X-ray fluoroscopic imaging device

Abstract

The present invention is provided with: a C-arm (17) that is rotatable and supports an X-ray tube (13) and an X-ray detector (15) so that the X-ray tube (13) and the X-ray detector (15) face each other; an image generation unit (43) that generates an X-ray image (L) using a detection signal from the X-ray detector (15); and an image display device (11) that displays the X-ray image (L), the image display device (11) being provided with: an image display unit (49) that can display the information display images (D) in a matrix arrangement; an input unit (51) for inputting an instruction for changing the position of the display image information (K) in the information display image (D) so that the at least two X-ray images (L) are displayed adjacent to each other with respect to the information display image (D); and an image display control unit (57) that, on the basis of the content of the instruction, controls the image display unit (49) so that the X-ray images (L) are displayed adjacent to each other.

Description

Technical Field

[0001] The invention relates to an X-ray fluoroscopic imaging device. Background Art

[0002] In the medical field, when performing angiography using catheter technology, for example, an X-ray fluoroscopy device for performing X-ray fluoroscopy or X-ray photography is indispensable. In this operation, X-rays are irradiated from any direction to the circulatory organ area of ​​the subject and fluoroscopy is performed. The operator performs the operation by appropriately operating the catheter while referring to the X-ray image data obtained by fluoroscopy.

[0003] Conventional X-ray fluoroscopy devices include a top plate on which a subject is placed, an imaging system including an X-ray tube and an X-ray detector, and a C-arm (C-arm) that supports the imaging system. The X-ray tube and the X-ray detector are disposed at one end and the other end of the C-arm, and the C-arm is configured so that the X-ray tube and the X-ray detector are disposed opposite to each other across the subject. The C-arm is configured to be able to slide along an arc path in accordance with the shape of the arm. In addition, the C-arm is supported by a rotatable rotating mechanism, and the C-arm can rotate around a predetermined axis as the rotating mechanism rotates. Therefore, by irradiating X-rays from an angle desired by the user, an X-ray image obtained by fluoroscopy or photography at that angle can be obtained.

[0004] In recent years, in particular, as a device for acquiring X-ray images of a subject in real time from two different directions, an X-ray fluoroscopy device (a dual-plane X-ray fluoroscopy device) having two C-arms supporting an imaging system has been proposed (for example, Patent Document 1). By using a dual-plane X-ray fluoroscopy device, it is possible to perform fluoroscopy on a predetermined area of ​​interest from two directions simultaneously through a single injection of a contrast agent. Such an X-ray fluoroscopy device is also called a CVS device (CVS: CardioVascular Systems), and is used when performing surgery on the cardiovascular system using a catheter.

[0005] When performing angiography with a dual-plane X-ray fluoroscopy device, the user inserts a catheter into the subject and moves the catheter to the site of interest. Then, a contrast agent is injected from the catheter into the blood vessel of the site of interest to perform X-ray photography in a state where the contour of the blood vessel is visualized, and X-ray image data of the contrast image (reference image) is acquired. Then, the X-ray image data as the reference image is displayed on the image display device, and the X-ray image data (collected image) acquired in real time is displayed on the image display device. The user operates the catheter to perform the operation while comparing the reference image in which the contrast agent is injected with the latest collected image in which the site of interest is injected.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2016-158658 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] However, in the case of the conventional example having such a structure, there are the following problems.

[0011] Each X-ray image data acquired in an X-ray fluoroscopy device is displayed on an image display device in a state where an information display area is spliced ​​with an area for displaying the X-ray image, i.e., an image display area. The information display area is an area for displaying information related to the X-ray image, such as X-ray irradiation conditions or X-ray irradiation angles, and is necessary in the X-ray image data. Here, in each X-ray image data, the positional relationship between the image display area and the information display area is fixed. As an example, an information display area is arranged on the left side of the image display area. Therefore, when the X-ray image data as a collected image and the X-ray image data as a reference image are arranged and displayed on the image display device, the information display area in the collected image or the information display area in the reference image is displayed between the image display area in the collected image and the image display area in the reference image.

[0012] By setting such a display mode, whenever the user compares the X-ray image as the collected image with the X-ray image as the reference image, the image display area enters the user's field of view. As a result, the information displayed in the information display area hinders the user's comparative study of the X-ray images, making it difficult to perform surgery quickly and increasing the burden on the user.

[0013] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an X-ray fluoroscopy apparatus that can easily compare and examine a plurality of displayed X-ray images.

[0014] Solutions for solving problems

[0015] In order to achieve the above object, the present invention adopts the following structure.

[0016] That is, a first embodiment of the present invention relates to an X-ray fluoroscopy apparatus comprising: an X-ray tube that irradiates an object with X-rays; an X-ray detector that detects the X-rays that have passed through the object; an arm that supports the X-ray tube and the X-ray detector so that they face each other; an arm rotation mechanism that rotates the arm around a predetermined axis; an X-ray image generating unit that generates an X-ray image using a detection signal output by the X-ray detector; and an X-ray image display device that displays the X-ray image, wherein the X-ray image display device comprises: an image display unit that can display information display images in a matrix arrangement, the information display image having the function of displaying a predetermined area of ​​interest. an X-ray image display area of ​​the X-ray image of the part and an image information display area displaying information related to the X-ray image; an information display area change indication unit, which is used to input an indication for changing the position of the image information display area in the information display image in a manner that the information display images are arranged and displayed on the image display unit so that at least two of the X-ray image display areas are displayed adjacent to each other; and an image display control unit, which controls the image display unit based on the content of the indication input to the information display area change indication unit, so as to change the position of the image information display area in the information display image in a manner that the X-ray image display areas are displayed adjacent to each other.

[0017] In addition, a second embodiment of the present invention relates to an X-ray fluoroscopic imaging device, which comprises: an X-ray tube that irradiates an object with X-rays; an X-ray detector that detects the X-rays that have passed through the object; an arm that supports the X-ray tube and the X-ray detector so that they face each other; an arm rotation mechanism that rotates the arm around a predetermined axis; an X-ray image generating unit that generates an X-ray image using a detection signal output by the X-ray detector; and an X-ray image display device that displays the X-ray image, wherein the X-ray image display device comprises: an image display unit that can display information display images in a matrix arrangement, and the information display image has a display An X-ray image display area showing the X-ray image of a specified part of interest, and an image information display area displaying information related to the X-ray image; an information display position setting unit, which pre-sets the position of the image information display area in the information display image in accordance with a pattern of positional relationship in which the information display images are arranged and displayed, so that the X-ray image display areas are displayed adjacent to each other; and an image display control unit, which controls the image display unit by determining a pattern of positional relationship in which the information display images are arranged and displayed, so that the position of the image information display area in the information display image becomes the position set by the information display position setting unit.

[0018] Effects of the Invention

[0019] According to a first embodiment of the present invention, an image display device 11 for displaying an X-ray image of a predetermined region of interest is provided, and the X-ray image display device includes an image display unit, an input unit 51, and an image display control unit. In the image display unit of the X-ray image display device, an information display image having an X-ray image display area and an image information display area is arranged and displayed in a matrix.

[0020] The input unit 51 is configured to be capable of inputting an instruction for changing the position of the X-ray image display area and the position of the image information display area in the information display image in such a manner that at least two X-ray image display areas are displayed adjacent to each other. The image display control unit controls the image display unit based on the instruction input to the input unit 51 so that the X-ray image display areas are displayed adjacent to each other.

[0021] That is, unlike the conventional apparatus in which the positional relationship between the X-ray image display area and the image information K in the information display image remains unchanged, the X-ray fluoroscopy apparatus according to the first embodiment is configured to be able to change the positional relationship between the X-ray image display area and the image information display area in the information display image. Therefore, even when the mode of arranging a plurality of information display images in a matrix form in the image display unit is appropriately changed according to the user's request, the positional relationship between the X-ray image L and the image information K in the information display image can be newly changed so that the X-ray image display areas are adjacent to each other in the arrangement mode of the changed information display image. Therefore, when comparing the X-ray images in the plurality of information display images, the arrangement mode of the information display image can be changed according to the user's request, and the image information display area can be reliably avoided from existing between the X-ray images to be compared. That is, it can be avoided that the image information display area interferes with the comparison operation when comparing the X-ray images, so the operation of comparing the X-ray images can be made easier.

[0022] According to a second aspect of the present invention, there is provided an X-ray image display device for displaying an X-ray image in which a predetermined region of interest is captured. The X-ray image display device includes an image display unit, an information display position setting unit, and an image display control unit.

[0023] In the image display unit, information display images having an X-ray image display area and an image information display area are arranged in a matrix and displayed.

[0024] The information display position setting unit pre-sets the positions of the image information display areas in the information display image in accordance with the pattern of the positional relationship in which the information display images are arranged and displayed, so that the X-ray image display areas are displayed adjacent to each other. The image display control unit controls the image display unit based on the positions of the image information display areas in the information display image set by the information display position setting unit, so that the X-ray image display areas are displayed adjacent to each other.

[0025] Thus, in the X-ray fluoroscopy apparatus described in the second item, the position of the image information display area in the information display image can be preset before generating the X-ray image. That is, during the operation, the X-ray image display areas can be displayed adjacent to each other without changing the position of the image information display area, so that the operation when comparing and studying the X-ray images can be more easily performed, and the process and time required for the operation can be further shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front view illustrating the overall structure of the X-ray fluoroscopy apparatus according to the first embodiment.

[0027] Figure 2 It is a right side view for explaining the overall structure of the X-ray fluoroscopy apparatus according to the first embodiment.

[0028] Figure 3 This is a functional block diagram illustrating a schematic configuration of an X-ray fluoroscopy apparatus according to the first embodiment.

[0029] Figure 4 This is a diagram showing the structure of an information display image according to the first embodiment.

[0030] Figure 5 This is a diagram showing an example of a pattern in which a plurality of information display images according to the first embodiment are arranged.

[0031] Figure 6 This is a flowchart for explaining the operation of the X-ray fluoroscopy apparatus according to the first embodiment.

[0032] Figure 7 This is a diagram for explaining step S1 according to the first embodiment.

[0033] Figure 8 This is a diagram for explaining step S2 according to the first embodiment.

[0034] Fig. 9 This is a diagram for explaining step S3 according to the first embodiment.

[0035] Fig.10 This is a diagram for explaining step S4 according to the first embodiment.

[0036] Fig.11 This is a diagram for explaining step S4 according to the first embodiment.

[0037] Fig.12 This is a flowchart for explaining the operation of the X-ray fluoroscopy apparatus according to the second embodiment.

[0038] Fig.13 This is a diagram for explaining step F0 involved in Example 2.

[0039] Fig.14 This is a diagram for explaining step F0 involved in Example 2.

[0040] Fig.15 This is a diagram for explaining step F0 involved in Example 2.

[0041] Fig.16 This is a diagram for explaining step F2 according to the second embodiment.

[0042] Fig.17 This is a diagram for explaining step F3 according to the second embodiment.

[0043] Fig.18 This is a diagram showing problems of the conventional structure.

[0044] Fig.19 The figures show the structure of the information display image according to the comparative example: (a) shows the structure of the information display image including the collected image, and (b) shows the structure of the information display image including the reference image.

[0045] Fig. 20 It is a diagram showing problems of the comparative example.

[0046] Fig.21 It is a diagram showing problems of the comparative example.

[0047] Fig. 22 It is a diagram showing a layout of an information display image according to a modification example in an initial state.

[0048] Fig.23 It is a diagram showing a state in which the layout of the information display image according to the modification example is changed. DETAILED DESCRIPTION

[0049] Next, Embodiment 1 of the present invention will be described with reference to the accompanying drawings.

[0050] <Description of overall structure>

[0051] like Figure 1 and Figure 2As shown, the X-ray fluoroscopic imaging device 1 according to the first embodiment includes a top plate 3, a first imaging device 5, and a second imaging device 7. The top plate 3 is used to place the subject M in a supine position. Figure 1 The state in which the feet of the subject M are directed toward the front side is shown.

[0052] As an example, the first imaging mechanism 5 irradiates X-rays from a vertical direction to the subject M. The first imaging mechanism 5 includes an X-ray tube 13 , an X-ray detector 15 , a C-arm 17 , a slide mechanism 19 , and a rotation mechanism 21 .

[0053] The X-ray tube 13 irradiates the object M with X-rays. The X-ray detector 15 detects the X-rays irradiated from the X-ray tube 13 and converts them into electrical signals. The X-ray tube 13 and the X-ray detector 15 are arranged to face each other with the top plate 3 interposed therebetween. The X-ray tube 13 and the X-ray detector 15 constitute an imaging system. The collimator 16 is provided at the X-ray tube 13 and is used to limit the X-rays irradiated from the X-ray tube 13 to a predetermined shape. As an example of the shape of the X-rays limited by the collimator 16, a cone formed in the shape of a pyramid can be cited.

[0054] The C-arm 17 is bent in a substantially C-shape. The X-ray tube 13 is provided on one end of the C-arm 17 , and the X-ray detector 15 is provided on the other end of the C-arm 17 .

[0055] The sliding mechanism 19 supports the C-arm 17 in a slidable manner. That is, the C-arm 17 is configured to slide along an arc path of the C-arm 17 indicated by the reference symbol RA. The arc path RA is a path along the arm shape of the C-arm 17, and is an arc path around an axis in the y direction (the short side direction of the top plate 3).

[0056] The rotating mechanism 21 is disposed on the side surface of the support 23, and supports the sliding mechanism 19 in a rotatable manner. The rotating mechanism 21 is configured to be rotatable around an axis (hereinafter also referred to as "body axis") of a horizontal axis P parallel to the x direction (long side direction of the top plate 3). The C arm 17 held by the rotating mechanism 21 via the sliding mechanism 19 rotates around the axis in the x direction as the rotating mechanism 21 rotates. The arc path of the axis around the horizontal axis P is shown by the reference symbol RB.

[0057] The C-arm 17 is configured to be rotatable about two orthogonal axes along the arc paths RA and RB, respectively, thereby being able to irradiate the subject M with X-rays from any direction. Figure 1 , a state in which the X-ray tube 13 irradiates the subject M with X-rays in the z direction (a direction perpendicular to the placement surface of the top plate 3 ) is shown.

[0058] The support column 23 is supported by a support base 25 disposed on the ground and is configured to be horizontally movable in the y direction (the short side direction of the top plate 3). The rotation mechanism 21, the slide mechanism 19 and the C arm 17 supported by the support column 23 move in the y direction as the support column 23 moves horizontally.

[0059] The second imaging mechanism 7 irradiates the subject M with X-rays from a direction different from that of the first imaging mechanism 5. As an example, the second imaging mechanism 7 irradiates X-rays from a horizontal direction. The second imaging mechanism 7 includes an X-ray tube 27, an X-ray detector 29, a C-arm 31, a sliding mechanism 33, and a rotating mechanism 35.

[0060] The X-ray tube 27 irradiates the subject M with X-rays. The X-ray detector 29 detects the X-rays irradiated from the X-ray tube 27 and converts them into electrical signals. The X-ray tube 27 and the X-ray detector 29 are arranged opposite to each other with the top plate 3 in between and constitute an imaging system. The collimator 30 is provided on the X-ray tube 27, and is used to limit the X-rays irradiated from the X-ray tube 27 to a prescribed shape. The C-arm 31 is a curved, roughly C-shaped shape. The X-ray tube 27 is provided on one end side of the C-arm 31, and the X-ray detector 29 is provided on the other end side of the C-arm 31. The sliding mechanism 33 supports the C-arm 31 in a manner that allows it to slide. That is, the C-arm 31 is configured to slide along the arc path of the C-arm 31 indicated by the reference symbol RC.

[0061] The rotating mechanism 35 is arranged on the upper surface of the sliding mechanism 33, and supports the sliding mechanism 33 in a rotatable manner. The rotating mechanism 35 is configured to be rotatable around an axis of a vertical axis Q parallel to the z direction (a direction orthogonal to the mounting surface of the top plate 3). The C-arm 31 held by the rotating mechanism 35 by the sliding mechanism 33 rotates around the axis in the z direction as the rotating mechanism 35 rotates. The arc path of the axis around the vertical axis Q is shown by the reference symbol RD. The C-arm 31 is configured to be freely rotatable around two orthogonal axes along each of the arc paths of the arc path RC and the arc path RD, thereby being able to irradiate the subject M with X-rays from any direction.

[0062] The rotation mechanism 35 is suspended from the ceiling T via a rail 36 and a ceiling travel portion 37 . The rail 36 extends in the x direction along the ceiling T. The ceiling travel portion 37 is connected to the rotation mechanism 35 and is configured to be reciprocatingly movable in the x direction along the rail 36 .

[0063] Thus, the X-ray fluoroscopy apparatus 1 according to the first embodiment is a so-called dual-plane type X-ray fluoroscopy apparatus having the first imaging mechanism 5 and the second imaging mechanism 7. By using the first imaging mechanism 5 and the second imaging mechanism 7, the subject M can be irradiated with X-rays simultaneously from different angles.

[0064] like Figure 3As shown, the X-ray fluoroscopy apparatus 1 further includes a main control unit 9 and an image display device 11. As an example, the main control unit 9 includes an information processing unit such as a central processing unit (CPU) and performs overall control of various components in the X-ray fluoroscopy apparatus 1. The main control unit 9 includes an X-ray irradiation control unit 39, a drive control unit 41, and an image generation unit 43.

[0065] The X-ray irradiation control unit 39 is configured to independently control the X-ray tube 13 and the X-ray tube 27. The X-ray irradiation control unit 39 is configured to output high voltage to each of the X-ray tube 13 and the X-ray tube 27. Then, based on the high voltage output provided by the X-ray irradiation control unit 39, the amount of X-rays irradiated by each of the X-ray tube 13 and the X-ray tube 27 and the timing of irradiating X-rays are controlled.

[0066] The drive control unit 41 is configured to independently control the movements of the C-arm 17 and the C-arm 31. The drive control unit 41 controls the driving mechanism (not shown) to appropriately control the rotation direction and the rotation amount of the C-arm 17 and the C-arm 31. The rotation angles of the C-arm 17 and the C-arm 31 are appropriately adjusted by the control of the drive control unit 41. The rotation angles of the C-arm 17 and the C-arm 31 are detected by a rotation angle detector (not shown) such as a rotary encoder, and the information of the rotation angle is sent to the main control unit 9 at any time.

[0067] The rotation directions of the C-arm 17 and the C-arm 31 are shown as follows. Figure 1 As shown, the direction of the head side in the body axis direction of the subject M is hereinafter represented as "CRA" (Cranial: head side), and the direction of the foot side in the body axis direction of the subject M is hereinafter represented as "CAU" (Caudal: lower limb side). Figure 2 As shown, the rotation direction around the body axis of the subject M toward the left side when viewed from the head side is represented as "LAO" (Left Anterior Oblique), and the rotation direction around the body axis of the subject M toward the right side when viewed from the head side is represented as "RAO" (Right Anterior Oblique: Right Anterior Oblique).

[0068] The rotation directions of the C-arm 17 and the C-arm 31 are expressed by a combination of the rotation direction of each C-arm in the body axis direction of the subject M (CRA or CAU) and the rotation direction of each C-arm in the direction around the body axis of the subject M (LAO or RAO). Furthermore, the rotation angle of the C-arm 17 is expressed by a combination of the rotation angle of the C-arm 17 in the body axis direction of the subject M and the rotation angle of the C-arm 17 around the body axis direction of the subject M. The rotation angle of the C-arm 31 is expressed in the same manner as the rotation angle of the C-arm 17.

[0069] The image generator 43 is provided at the subsequent stage of the X-ray detector 15 and the X-ray detector 29, and generates an X-ray image by performing various image processing based on the X-ray detection signals outputted from the X-ray detector 15 and the X-ray detector 29, respectively. That is, the image generator 43 generates each of the X-ray image captured by the first imaging device 5 and the X-ray image captured by the second imaging device 7. In addition, the image generator 43 generates data of the information display image D by associating the data of the image information K with the data of the X-ray image L. Details of the image information K and the information display image D will be described later.

[0070] The X-ray fluoroscopy apparatus 1 further includes a storage unit 45 and an operation console 47. The storage unit 45 is used to store various information related to the X-ray fluoroscopy apparatus 1. As an example of the information stored in the storage unit 45, various information such as information related to X-ray imaging conditions such as tube voltage and tube current, various X-ray images generated by the image generating unit 43, and information related to image processing performed by the image generating unit 43 are stored. As an example of the storage unit 45, a non-volatile memory can be cited.

[0071] The console 47 is used to input the operator's instructions related to the operation of the X-ray fluoroscopic imaging device 1, and the main control unit 9 performs unified control according to the instructions input by the user to the console 47. Examples of the console 47 include a keyboard input type panel, a touch input type panel, a mouse, a dial, a toggle switch, a push button switch, etc.

[0072] The image display device 11 includes an image display unit 49, an input unit 51, a layout storage unit 53, a layout setting unit 55, and an image display control unit 57. The image display unit 49 displays the information display image D generated by the image generation unit 43, that is, the X-ray image L in a state where the image information K is added. As an example of the image display unit 49, a liquid crystal monitor can be cited. As an example of a structure in which the image display unit 49 is arranged, a structure suspended from a ceiling or a structure mounted on a mobile carriage can be cited. In this embodiment, as Figure 1 As shown, the image display unit 49 is provided as a large-screen monitor suspended from the ceiling.

[0073] The input unit 51 is used to input instructions related to the operation of the image display device 11 from the operator, and various operations in the image display device 11 are performed according to the instructions input by the user to the input unit 51. Examples of the input unit 51 include a keyboard input type panel, a touch input type panel, a mouse, and the like.

[0074] The layout storage unit 53 is used to store information related to the layout of the image displayed on the image display unit 49. In the present first embodiment, the layout storage unit 53 stores a configuration pattern when a plurality of information display images D are displayed on the image display unit 49. In addition, the layout storage unit 53 is configured to store the positional relationship between the X-ray image L and the image information K in each information display image D. In addition, regarding the configuration pattern related to the plurality of information display images D and the configuration pattern of the X-ray image L and the image information K in the information display image D, a predetermined initial state mode (default mode) is stored in the layout storage unit 53.

[0075] The layout setting unit 55 receives an instruction from the operator via the input unit 51, and resets the positional relationship between the X-ray image L and the image information K in the information display image D according to the instruction from the operator. In addition, the layout setting unit 55 resets the arrangement pattern of the plurality of information display images D on the display screen of the image display unit 49 according to the instruction from the operator via the input unit 51.

[0076] The image display control unit 57 controls the display mode of various image data on the image display unit 49. The image display control unit 57 controls the image display unit 49 to display each information display image D on the image display unit 49 according to the arrangement pattern set by the layout setting unit 55.

[0077] <Structure of Information Display Image>

[0078] Next, the structure of the information display image D displayed on the image display unit 49 will be described. Figure 4 As shown, the information display image D includes an X-ray image L and image information K. The X-ray image L is an image acquired by appropriately performing image processing on the X-ray detection signal output from the X-ray detector 15 or the X-ray detector 29, and is an image of a portion of interest of the subject M. The area where the X-ray image L is displayed in the information display image D corresponds to the X-ray image display area in this embodiment.

[0079] The image information K displays information related to the X-ray image L that is added and set. As an example of the information displayed by the image information K, the irradiation condition information J1 or the irradiation direction information J2 can be cited. The irradiation condition information J1 is information related to the conditions for irradiating X-rays, and as an example, in addition to the tube voltage or tube current of the X-ray tube, it also includes information such as the X-ray irradiation time. The irradiation direction information J2 is information related to the direction of irradiating X-rays, and as an example, it includes information on the rotation angles of the C-arm 17 and the C-arm 31. The area where the image information K is displayed in the information display image D is equivalent to the image information display area in this embodiment.

[0080] In the information display image D, the X-ray image L and the image information K are arranged side by side. Figure 4 The arrangement pattern of the X-ray image L and the image information K in the initial state is shown. In this initial state, the area where the image information K is arranged in the information display image D is determined to be on the left side of the area where the X-ray image L is arranged. In Example 1, it is configured to be able to change the arrangement pattern of the X-ray image L and the image information K in the information display image D by having an input unit 51 and a layout setting unit 55. The operation of changing the arrangement pattern will be described later. The input unit 51 is equivalent to the information display area change instruction unit in this embodiment. The layout setting unit 55 is equivalent to the information display position setting unit in this embodiment.

[0081] Figure 5 The arrangement pattern of each information display image D when a plurality of X-ray images L are displayed on the image display unit 49 is shown. When angiography is performed using the catheter Ch, an X-ray image L acquired in a state where the blood vessel is angiographically contrasted with a contrast agent (hereinafter referred to as a "reference image LR") and an X-ray image L acquired in real time (hereinafter referred to as a "collected image LF") are acquired. Then, the reference image LR and the collected image LF are displayed on the image display unit 49, and the position of the catheter Ch is grasped by comparing the two.

[0082] Furthermore, when angiography is performed using the dual-plane X-ray fluoroscopic imaging device 1, the first imaging device 5 and the second imaging device 7 are used to capture X-ray images L of the subject M at different imaging angles, and the X-ray images L are displayed on the image display unit 49. That is, the collected image LF and the reference image LF captured by the first imaging device 5, and the collected image LF and the reference image LF captured by the second imaging device 7 are displayed on the image display unit 49, respectively.

[0083] In addition, the collection image LF captured by the first camera 5 is set as the collection image LF1 to distinguish it from the collection image LF captured by the second camera 7, that is, the collection image LF2. In addition, the reference image LR captured by the first camera 5 is set as the reference image LR1 to distinguish it from the reference image LR captured by the second camera 7, that is, the reference image LR2.

[0084] Furthermore, the image information K added to the reference images FR1 and FR2 and the collected images LF1 and LF2 are distinguished from each other by assigning different reference numerals as image information KR1, KR2, KF1, and KF2. In addition, the image in which the image information KR1 is added to the reference image LR1 in the information display image D is referred to as the information display image DR1. Similarly, the images in which the X-ray image L is the reference image LR2, the X-ray image L is the collected image LF1, and the X-ray image L is the collected image LF2 in the information display image D are referred to as the information display image DR2, the information display image DF1, and the information display image DF2, respectively, to distinguish from each other.

[0085] Figure 5 The configuration mode of the four information display images DR1, DR2, DF1, and DF2 in the initial state is shown. The four information display images DR1, DR2, DF1, and DF2 are arranged in a matrix on the screen of the image display unit 49. In the first embodiment, in the configuration mode of the initial state, the information display images DF1 and DR2 acquired by the first camera unit 5 are arranged in the upper layer, and the information display images DF2 and DR2 acquired by the second camera unit 7 are arranged in the lower layer. In addition, the information display images DR1 and DR2 including the reference image LR are arranged on the right side of the information display images DF1 and DF2 including the collected image LF.

[0086] <Overview of Action>

[0087] Next, the operation of the X-ray fluoroscopy apparatus 1 according to the first embodiment will be described. Figure 6 The flowchart related to the operation of the X-ray fluoroscopy apparatus 1 is shown. In the first embodiment, the case where angiography of a cardiovascular vessel is performed by biplane imaging using the first imaging means 5 and the second imaging means 7 is described as an example.

[0088] Step S1 (selection of configuration mode)

[0089] First, before performing X-ray photography on the subject M, a layout pattern in the image display unit 49 is selected for a plurality of information display images D. The user operates the console 47 to read out the layout pattern of the information display image D stored in the layout storage unit 53. Each of the read-out layout patterns is as follows: Figure 7 As shown in FIG. 1 , the information display image D is displayed on the display GS or the like provided on the operation console 47. Figure 7 As shown in FIG. 1 , in addition to the arrangement pattern PT1 in which the reference image LR is arranged on the right side of the collected image LF, there is also a pre-set arrangement pattern PT2 in which the reference image LR is arranged on the lower side of the collected image LF. In other words, the arrangement pattern PT1 is as follows: Figure 5 The information shown here shows the arrangement pattern of the images DR1, DR2, DF1, and DF2.

[0090] The user selects a mode that is preferable for the advancement of surgery from among the arrangement modes of the information display image D. Here, it is assumed that the arrangement mode PT1 is selected as the arrangement mode of the information display image D in the initial state.

[0091] Step S2 (Acquisition of reference image)

[0092] After selecting the configuration mode of the information display image D in the initial state, a reference image is acquired. That is, the user inserts the catheter Ch into the body of the subject M and makes the catheter Ch reach the cardiovascular system of the subject M. After the catheter Ch reaches the cardiovascular system as the target site, the C-arm 17 of the first imaging mechanism 5 and the C-arm 31 of the second imaging mechanism 7 are rotated to a predetermined rotation angle, and a contrast image is acquired as a reference image LR. The user injects a contrast agent into the blood vessel of the subject M from the front end of the catheter Ch.

[0093] After the contrast agent is administered, the X-ray image L is started. That is, the operator operates the console 47 to irradiate the X-rays from the X-ray tube 13 of the first imaging mechanism 5 and the X-ray tube 27 of the second imaging mechanism 7 to the subject M. The X-ray detector 15 detects the X-rays irradiated from the X-ray tube 13 at the first imaging angle and transmitted through the target site of the subject M, and outputs an X-ray detection signal. The X-ray detector 29 detects the X-rays irradiated from the X-ray tube 27 at the second imaging angle and transmitted through the target site, and outputs an X-ray detection signal.

[0094] The image generator 43 generates an X-ray image L that captures the contrast-enhanced blood vessels at the site of interest as a reference image LR1 based on the X-ray detection signal output by the X-ray detector 15. In addition, the image generator 43 generates an X-ray image L that captures the contrast-enhanced blood vessels at the site of interest as a reference image LR2 based on the X-ray detection signal output by the X-ray detector 29. The reference image LR1 and the reference image LR2 are X-ray images obtained by simultaneously capturing the same site of interest from different imaging angles.

[0095] The image generating unit 43 adds the image information K to the reference image LR1 and the reference image LR2 to generate the information display image D. That is, the image generating unit 43 adds the image information KR1 showing the information of the first shooting angle and the like to the reference image LR1 captured by the first camera unit 5 to generate the information display image DR1. In addition, the image generating unit 43 adds the image information KR2 showing the information of the second shooting angle and the like to the reference image LR2 captured by the second camera unit 7 to generate the information display image DR2. The data of the generated information display image DR1 and the information display image DR2 are transmitted to the image display device 11.

[0096] In the image display device 11, the image display control unit 57 controls the image display unit 49 to display the information display image DR1 and the information display image DR2 on the image display unit 49. Figure 8 As shown, the positions of the information display image DR1 and the information display image DR2 displayed on the image display unit 49 are determined according to the configuration mode selected in step S1. That is, the information display image DR1 is displayed on the upper right portion of the image display unit 49, and the information display image DR2 is displayed on the lower right portion of the image display unit 49. In addition, the information display image DR1 and the information display image DR2 are configured so as to be adjacent to each other in the up-down direction.

[0097] After the contrast agent is injected into the blood vessel, the contrast agent diffuses along the blood flow over time, so the blood vessel at the site of interest becomes non-contrast-enhanced. Therefore, by acquiring the reference image LR1 and the reference image LR2 in the state where the blood vessel is contrast-enhanced and displaying them on the image display unit 49, the position of the blood vessel Ra at the site of interest can be confirmed by referring to the reference image LR1 and the reference image LR2. By acquiring each information display image D including the reference image LR and displaying it on the image display unit 49, the process of step S2 is completed.

[0098] Step S3 (acquisition of collected images)

[0099] After the reference image LR is acquired, the collected image LF is acquired. The user operates the console 47 again to irradiate the subject M with X-rays from the X-ray tube 13 and the X-ray tube 27 at the same imaging angle as that in step S2.

[0100] The image generator 43 generates the latest X-ray image L that captures the region of interest as the collected image LF1 based on the X-ray detection signal output by the X-ray detector 15. In addition, the image generator 43 generates the latest X-ray image L that captures the region of interest as the collected image LF2 based on the X-ray detection signal output by the X-ray detector 29. The collected image LF1 and the collected image LF2 are X-ray images obtained by simultaneously capturing the same region of interest from different imaging angles, and capture the latest image of the catheter Ch.

[0101] The image generation unit 43 adds the image information K to the collected image LF1 and the collected image LF2 to generate the information display image D. That is, the image generation unit 43 adds the image information KF1 showing the information such as the first shooting angle to the collected image LF1 captured by the first camera unit 5 to generate the information display image DF1. In addition, the image generation unit 43 adds the image information KF2 showing the information such as the second shooting angle to the collected image LF2 captured by the second camera unit 7 to generate the information display image DF2. The data of the generated information display image DF1 and the information display image DF2 are sent from the image generation unit 43 to the image display device 11.

[0102] In the image display device 11, the image display control unit 57 controls the image display unit 49 to display the information display image DF1 and the information display image DF2 on the image display unit 49. Fig. 9 As shown, the positions of the information display image DF1 and the information display image DF2 displayed on the image display unit 49 are determined according to the arrangement pattern selected in step S1. That is, the information display image DF1 is displayed adjacent to the left side of the information display image DR1, and the information display image DF2 is displayed adjacent to the left side of the information display image DR2.

[0103] The user intermittently acquires the collected image LF to further grasp the latest state of the catheter Ch. That is, the X-ray tube 13 and the X-ray tube 27 intermittently irradiate the subject M. Each time the X-ray is irradiated, the image generator 43 newly generates the information display image DF1 and the information display image DF2. Therefore, the real-time information display image DF1 and the information display image DF2 captured in the catheter Ch are displayed on the image display unit 49. By acquiring each information display image D including the collected image LF and displaying it on the image display unit 49, the process of step S3 is completed.

[0104] Step S4 (Layout Change)

[0105] In the initial state, it is determined that the X-ray image L is arranged on the right side of the image information K in each information display image D. Therefore, at the time point when step S3 is completed, in the information display image DF1, the collection image LF1 is arranged on the right side of the image information KF1, and in the information display image DR1, the reference image LR1 is arranged on the right side of the image information KR1. Therefore, when the information display images DR1, DR2, DF1, and DF2 are displayed on the image display unit 49 in the arrangement mode of the initial state, the image information KR1 is arranged between the collection image LF1 and the reference image LR1. In addition, the image information KR2 is arranged between the collection image LF2 and the reference image LR2.

[0106] When performing a catheter operation based on angiography, the user needs to alternately move the line of sight to the reference image LR, which is a contrast image, and the collected image LF, which is a real-time image in a non-contrast state, to compare the two. Therefore, when image information K is arranged between the reference image LR and the collected image LF, the image information K prevents the comparison operation from being performed. Therefore, in the first embodiment, the layout of the information display image DR1 is changed relative to the initial state by the user's operation. That is, the operation of making the collected image LF1 adjacent to the reference image LR1 is performed by changing the positional relationship between the image information KR1 and the reference image LR1.

[0107] When changing the layout of the information display image DR1, the user operates the input unit 51 provided in the image display device 11 to input an instruction for arranging the collection image LF1 on the right side of the reference image LR1. Fig.10 As shown in FIG. 1 , the area of ​​the image information KF1 is selected by operating the cursor CS on the screen of the image display unit 49 using a mouse or the like. Then, as an example, an operation of dragging the image information KF1 to the right is performed using the mouse.

[0108] The content of the instruction input by the user using the input unit 51 is accepted by the layout setting unit 55. Then, the layout setting unit 55 changes the arrangement pattern of the image information K and the X-ray image L in the information display image D according to the content of the instruction. That is, in the information display image DR1, the arrangement pattern in which the image information KR1 is arranged on the left side of the reference image LR1 in the initial state is changed to the arrangement pattern in which the image information KR1 is arranged on the right side of the reference image LR1.

[0109] The layout setting unit 55 sends the changed arrangement pattern of the image information KR1 and the reference image LR1, that is, information on the layout of the changed information display image DR1, to the layout storage unit 53 and the image display control unit 57. The layout storage unit 53 stores the setting of the changed layout of the information display image DR1.

[0110] The image display control unit 57 controls the image display unit 49 according to the information of the layout of the information display image DR1 newly set by the layout setting unit 55, so as to change the way in which the information display image DR1 is displayed on the image display unit 49. The layout of the information display image DR1 displayed on the image display unit 49 is changed by the control of the image display control unit 57. Fig.10 As shown, in the information display image DR1, the image information KR1 is displayed on the right side of the reference image LR1. As a result, the X-ray image L (reference image LR1) in the information display image DR1 and the X-ray image L (collected image LF1) in the information display image DF1 are adjacent to each other in the left-right direction G.

[0111] In addition, by changing the layout, the reference image LR1 and the collected image LF1 are in a state where the entire sides of each image are consistent in the arrangement direction (G direction). In other words, the position (height) of the reference image LR1 and the position (height) of the collected image LF1 are consistent in the direction (H direction) orthogonal to the arrangement direction. By changing the layout in a manner that makes the height of the reference image LR1 consistent with the height of the collected image LF1, the user can compare the reference image LR1 with the collected image LF1 by moving the line of sight parallel to the G direction. That is, when comparing the position of the image captured in the reference image LR1 with the position of the image captured in the collected image LF1, there is no need to move the line of sight in an inclined direction and consider the height difference of each image, so the action of comparing the reference image LR1 with the collected image LF1 becomes easier.

[0112] After changing the layout of the information display image DR1 so that the reference image LR1 is adjacent to the collection image LF1, the operation of changing the layout of the information display image DR2 is performed. That is, since the image information KR2 is arranged between the collection image LF2 and the reference image LR2 in the initial layout, the layout of the information display image DR2 is changed to change the positional relationship between the image information KR2 and the reference image LR2.

[0113] For example, the user drags the image information KF2 to the right while the image information KF2 is selected, thereby inputting an instruction to arrange the image information KR2 on the right side of the reference image LR2. The user's operation is accepted by the layout setting unit 55, and the layout of the information display image DR2 is changed from the mode in which the image information KR2 is arranged on the left side of the reference image LR2 to the mode in which the image information KR2 is arranged on the right side of the reference image LR2.

[0114] The image display control unit 57 controls the image display unit 49 so that the information display image DR2 is displayed according to the changed layout setting. Fig.11As shown, in the information display image DR2, the image information KR2 is displayed on the right side of the reference image LR2. As a result, the X-ray image L (reference image LR2) in the information display image DR2 and the X-ray image L (collected image LF2) in the information display image DF2 are adjacent to each other in the left-right direction G. In addition, the reference image LR2 and the collected image LF2 are in a state where the entire sides of each image are consistent in the arrangement direction (G direction).

[0115] In this way, the layout of the information display image D is appropriately changed to facilitate comparison between the reference image LR and the collected image LF. In the first embodiment, the process of step S4 is completed by changing the layout of the information display image DR1 and the information display image DR2.

[0116] Step S5 (Comparison of images)

[0117] After changing the layout of the information display image D, the operation is performed while comparing the reference image LR with the collected image LF. The user can understand the positional relationship between the catheter Ch and the blood vessel Ra at the target site of the subject M by confirming the real-time position of the catheter Ch captured in the collected image LF and the position of the contrast-enhanced blood vessel Ra captured in the reference image LR.

[0118] That is, the user grasps the positional relationship between the catheter Ch and the blood vessel Ra at the site of interest of the subject M in the first imaging direction by alternately directing the line of sight toward the reference image LR1 and the collected image LF1 displayed on the image display unit 49 and comparing the images. In addition, the user grasps the positional relationship between the catheter Ch and the blood vessel Ra at the site of interest in the second imaging direction by comparing the reference image LR2 and the collected image LF2. By grasping the accurate positional relationship between the catheter Ch and the blood vessel Ra, the user can operate the catheter Ch to perform diagnosis and treatment.

[0119] In the first embodiment, the comparison operation between the reference image LR and the collected image LF is performed in a state where the layout of the information display image D is changed. That is, in the initial state, the reference image LR and the collected image LF are in a state facing each other with the image information K interposed therebetween, but by performing the operation of changing the layout, the reference image LR and the collected image LF as the comparison object become adjacent to each other.

[0120] Therefore, when the user moves the line of sight alternately toward the reference image LR and the collected image LF as the comparison object, it is possible to prevent the content of the image information K from hindering the user from conducting a comparative study. In addition, since the reference image LR and the collected image LF are adjacent to each other, the distance that the user moves the line of sight is shortened by an amount corresponding to the image information K. Therefore, it is possible to reduce the fatigue that the user experiences when performing the comparison operation between the reference image LR and the collected image LF.

[0121] Moreover, the positions (heights) of the collected image LF and the reference image LR, which are adjacently arranged in the left-right direction G, in the up-down direction H are consistent. Therefore, the user can compare the collected image LF with the reference image LR without considering the positional deviation of the images in the up-down direction H by moving the line of sight alternately in the left-right direction.

[0122] In addition, the user can compare the reference image LR with the collected image LF during the operation, and can compare the collected image LF1 and the collected image LF2 having different imaging directions. That is, by comparing the collected image LF1 and the collected image LF2 arranged adjacent to each other in the vertical direction H, the three-dimensional position of the catheter Ch and the three-dimensional structure of the part of interest of the subject M can be grasped.

[0123] Since the image information K is not arranged between the collected image LF1 and the collected image LF2, it is possible to avoid the image information K becoming an obstacle when the user directs the line of sight alternately toward the collected image LF1 and the collected image LF2. In addition, the positions of the collected image LF1 and the collected image LF2 arranged adjacent to each other in the up-down direction H coincide with each other in the left-right direction G. Therefore, the user can compare the collected image LF1 and the collected image LF2 without considering the positional deviation in the left-right direction G by moving the line of sight alternately in the up-down direction. The user completes the operation of the catheter Ch using each information display image D after the layout is changed, thereby completing a series of steps related to angiography using the X-ray fluoroscopic imaging device 1.

[0124] Example 2

[0125] Next, the second embodiment of the present invention is described. In the first embodiment, the layout of the information display image D is changed after the X-ray is irradiated to the subject M. That is, in a state where a reference image LR and a collection image LF are generated as comparison objects and each image is displayed on the image display unit 49, an operation of changing the layout of the information display image D including the reference image LR or the collection image LF is performed. In addition, the structure of the X-ray fluoroscopic imaging device 1 involved in the second embodiment is the same as that of the first embodiment, and therefore a detailed description of the structure is omitted.

[0126] On the other hand, in the second embodiment, the layout of the information display image D is changed in advance before irradiating the subject M with X-rays. That is, the operation of changing the layout of the information display image D is performed in advance for each arrangement pattern of the information display image D stored in the layout storage unit 53 when displaying a plurality of information display images D on the image display unit 49.

[0127] Here, the operation of the X-ray fluoroscopy apparatus 1 according to the second embodiment will be described. Fig.12A flowchart related to the operation of the X-ray fluoroscopy apparatus 1 according to Embodiment 2 is shown. In Embodiment 2, similarly to Embodiment 1, a case where cardiovascular angiography is performed by biplane imaging is described as an example.

[0128] Step F0 (Layout Setting)

[0129] In the second embodiment, as a preliminary stage of performing angiography, an operation of setting a layout is performed for each mode of arranging a plurality of information display images D on the screen of the image display unit 49. In the image display device 11, the layout storage unit 53 stores the following information display images D: Figure 7 The information shown shows the configuration patterns PT1, PT2, etc. of the image D.

[0130] The user operates the operation console 47 and the like to read out the arrangement pattern of the information display image D stored in the layout storage unit 53. Each arrangement pattern read out is as follows: Figure 7 The display GS etc. are displayed as shown.

[0131] After reading the configuration mode of the information display image D, the user selects the configuration mode to be the target of the layout setting operation. Here, it is assumed that the configuration mode PT1 is selected as the target of the layout setting. The information of the configuration mode PT1 to be selected is read from the layout storage unit 53. Fig.13 As shown in FIG. 1 , an image for changing the layout in the arrangement pattern PT1 is displayed on the display screen of the image display unit 49 or the like.

[0132] In addition, if Fig.13 As shown, in the configuration pattern PT1, the four information display images D are arranged in two columns in the left-right direction G and in two columns in the up-down direction H. In other words, the configuration areas Da, Db, Dc, and Dd occupy the upper left part, the upper right part, the lower left part, and the lower right part of the entire area of ​​the configuration pattern PT1. The configuration areas Da, Db, Dc, and Dd are areas where the information display images DR1, DR2, DF1, and DF2 are arranged.

[0133] In addition, the configuration area Da includes the configuration area La and the configuration area Ka, and the configuration area Ka is configured to be located on the left side of the configuration area La. The configuration area La is an area where the collected image LF1 is configured, and the configuration area Ka is an area where the image information KF1 is configured. Fig.13 As shown, on the screen of the image display unit 49, information P1 is marked in the configuration area La, and information P2 is marked in the configuration area Ka. Information P1 is information for visually presenting that it is the area where the collected image LF1 is configured. Information P2 is information for visually presenting that it is the area where the image information KF1 is configured.

[0134] In addition, the configuration area Db includes a configuration area Lb and a configuration area Kb. The configuration area Lb is an area for configuring the reference image LR1, and the configuration area Kb is an area for configuring the image information KR1. The configuration area Dc includes a configuration area Lc and a configuration area Kc. The configuration area Lc is an area for configuring the collected image LF2, and the configuration area Kc is an area for configuring the image information KF2. The configuration area Dd includes a configuration area Ld and a configuration area Kd. The configuration area Ld is an area for configuring the reference image LR2, and the configuration area Kd is an area for configuring the image information KR2. In addition, similarly to the configuration area La and the configuration area Ka, each of the configuration areas Lb to Ld and the configuration areas Kb to Kd is labeled with information for visually identifying the configured X-ray image or image information.

[0135] Users visually identify Fig.13 The display screen of the image display unit 49 shown in FIG. 1 is used to understand the positions of the reference image LR and the collected image LF, and the positions of the image information K. That is, the following situation is understood: when the angiography is started in the initial state of the arrangement mode PT1, the image information KR1 is arranged between the reference image LR1 and the collected image LF1 as the contrast object, and the image information KR1 will hinder the contrast operation.

[0136] Therefore, as an early stage of starting angiography, the user performs an operation to change the layout of arrangement pattern PT1 so that arrangement area La, which displays collected image LF1, and arrangement area Lb, which displays reference image LR1, are adjacent to each other.

[0137] As a specific operation, first, Fig.14 As shown in FIG. 1 , the cursor CS is aligned with the configuration area Kb as the area for displaying the image information KR1 and the configuration area Kb is moved to the right, thereby changing the layout of the configuration area Db so that the configuration area Kb is located on the right side of the configuration area Lb. By this change operation, the configuration area Ka is located on the left side of the configuration area Lb, while the configuration area Kb is located on the right side of the configuration area Lb. As a result, the layout of the configuration pattern PT1 is changed so that the configuration area La and the configuration area Lb are adjacent to each other in the left-right direction.

[0138] In addition, the user also understands that in the initial state of the arrangement mode PT1, image information KR2 is arranged between the reference image LR2 and the collected image LF2 to be compared, and this image information KR2 will hinder the comparison operation. Fig.15As shown in FIG. 1 , by aligning the cursor CS with the configuration area Kd and moving the configuration area Kd to the right, the layout of the configuration area Dd is changed so that the configuration area Kd is located on the right side of the configuration area Ld. As a result, the layout of the configuration pattern PT1 is changed so that the configuration area Lc and the configuration area Ld are adjacent to each other in the left-right direction.

[0139] After the operation of changing the layout of the configuration pattern PT1 from the initial state is completed, the user performs an operation of saving the changed layout. Through this saving operation, the layout storage unit 53 stores the configuration pattern PT1 in the changed state. By storing the changed layout, the operation of changing the layout of the configuration pattern PT1 can be omitted when the configuration pattern PT1 is used for angiography the next time. By changing the layout of the configuration pattern PT1, the process of step F0 is completed.

[0140] Step F1 (Selection of configuration mode)

[0141] After the layout change operation is completed, angiography is started. That is, similarly to step S1 of the first embodiment, first, a layout pattern in the image display unit 49 is selected for a plurality of information display images D. The user operates the operation console 47 to read out the layout pattern ( Figure 7 ). Then, the configuration pattern PT1 to be used is selected from the read configuration patterns.

[0142] In step F0, the layout of the configuration pattern PT1 is changed, and the configuration pattern PT1 in the changed state is stored in the layout storage unit 53. Therefore, the configuration pattern read from the layout storage unit 53 becomes as follows: Fig.15 That is, the arrangement area La and the arrangement area Lb are arranged adjacent to each other in the left-right direction, and the arrangement area Lc and the arrangement area Ld are arranged adjacent to each other in the left-right direction.

[0143] Step F2 (Acquisition of reference image)

[0144] After selecting the configuration mode of the information display image D in the initial state, a reference image is acquired. The process of step F2 involved in Example 2 is the same as the process of step S2 involved in Example 1. That is, the user inserts the catheter Ch into the body of the subject M and makes the catheter Ch reach the cardiovascular system of the subject M. After the catheter Ch reaches the cardiovascular system as the target site, the C arm 17 of the first imaging device 5 and the C arm 31 of the second imaging device 7 are respectively rotated to a predetermined rotation angle to acquire a contrast image as a reference image LR. The user injects a contrast agent into the blood vessel of the subject M from the front end of the catheter Ch.

[0145] After the contrast agent is administered, the X-ray image L is taken. That is, the operator operates the console 47 to irradiate the X-rays from the X-ray tube 13 of the first imaging mechanism 5 and the X-ray tube 27 of the second imaging mechanism 7 to the subject M. The X-ray detector 15 detects the X-rays irradiated from the X-ray tube 13 at the first imaging angle and transmitted through the target site of the subject M, and outputs an X-ray detection signal. The X-ray detector 29 detects the X-rays irradiated from the X-ray tube 27 at the second imaging angle and transmitted through the target site, and outputs an X-ray detection signal.

[0146] The image generator 43 generates a reference image LR1 based on the X-ray detection signal output by the X-ray detector 15, and generates a reference image LR2 based on the X-ray detection signal output by the X-ray detector 29. In addition, the image generator 43 adds the setting image information KR1 to the reference image LR1 to generate the information display image DR1. Furthermore, the image generator 43 adds the setting image information KR2 to the reference image LR2 to generate the information display image DR2. The data of the generated information display image DR1 and the information display image DR2 are sent to the image display device 11.

[0147] In the image display device 11, the image display control unit 57 controls the image display unit 49 to display the information display image DR1 and the information display image DR2 on the image display unit 49. The positions of the information display image DR1 and the information display image DR2 displayed on the image display unit 49 are determined according to the arrangement pattern PT1 read in step F1.

[0148] That is, the information display image DR1 is as follows Fig.16 The information display image DR2 is displayed in the display area Db after the layout change as shown. That is, the reference image LR1 is displayed at the position of the display area Lb, and the image information KR1 is displayed on the right side of the reference image LR1 (the position of the display area Kb). In addition, the information display image DR2 is displayed in the display area Dd after the layout change. That is, the reference image LR2 is displayed at the position of the display area Ld, and the image information KR2 is displayed on the right side of the reference image LR2 (the position of the display area Kd). By acquiring each image of the information display images DR1 and DR2 and displaying them on the image display unit 49, the process of step S2 is completed.

[0149] Step F3 (acquisition of collected images)

[0150] After acquiring each reference image LR, the collection image LF is acquired. The process of step F3 involved in Example 2 is the same as the process of step S3 involved in Example 1. That is, the user operates the console 47 again to irradiate the subject M with X-rays from the X-ray tube 13 and the X-ray tube 27 at the same imaging angle as that in step F2.

[0151] The image generator 43 generates the latest X-ray image L that captures the part of interest as the collected image LF1 based on the X-ray detection signal output by the X-ray detector 15. In addition, the image generator 43 generates the latest X-ray image L that captures the part of interest as the collected image LF2 based on the X-ray detection signal output by the X-ray detector 29. The image generator 43 adds the setting image information KF1 to the collected image LF1 to generate the information display image DF1. In addition, the image generator 43 adds the setting image information KF2 to the collected image LF2 to generate the information display image DF2. The data of the generated information display image DF1 and the information display image DF2 are sent from the image generator 43 to the image display device 11.

[0152] In the image display device 11, the image display control unit 57 controls the image display unit 49 to display the information display image DF1 and the information display image DF2 on the image display unit 49. The positions of the information display image DF1 and the information display image DF2 displayed on the image display unit 49 are determined according to the arrangement pattern PT1 read in step F1.

[0153] That is, the information display image DF1 is as follows Fig.17 The information display image DF2 is displayed in the display area Dc after the layout change as shown. That is, the collection image LF1 is displayed at the position of the display area La, and the image information KF1 is displayed on the left side of the collection image LF1 (at the position of the display area Ka). In addition, the information display image DF2 is displayed in the display area Dc after the layout change. That is, the collection image LF2 is displayed at the position of the display area Lc, and the image information KF2 is displayed on the left side of the collection image LF2 (at the position of the display area Kc).

[0154] Therefore, the collected image LF1 and the reference image LR1 captured by the first imaging device 5 are displayed in a state adjacent to each other in the left-right direction G. In addition, the collected image LF2 and the reference image LR2 captured by the second imaging device 7 are also displayed in a state adjacent to each other in the left-right direction G. By performing the process of step F0 in advance in this way, the reference image LR generated in step F2 and the collected image generated in step F3 are automatically displayed at positions adjacent to each other.

[0155] The user intermittently acquires the collected image LF to further grasp the latest state of the catheter Ch. Every time X-rays are irradiated, the image generator 43 newly generates the information display image DF1 and the information display image DF2 and displays them on the image display unit 49. By displaying the information display image DF1 and the information display image DF2 including the collected image LF on the image display unit 49, the process of step S3 is completed.

[0156] Step F4 (Comparison of images)

[0157] After each reference image LR and each collected image LF are displayed on the image display unit 49, surgery is performed while comparing the reference image LR with the collected image LF. The process of step F4 involved in the second embodiment is the same as the process of step S5 involved in the first embodiment. That is, the user understands the positional relationship between the catheter Ch and the blood vessel Ra at the target site of the subject M by confirming the position of the real-time catheter Ch captured in the collected image LF and the position of the contrast-enhanced blood vessel Ra captured in the reference image LR.

[0158] The user alternately directs his / her line of sight toward the reference image LR1 and the collected image LF1 displayed on the image display unit 49 and compares the images to understand the positional relationship between the catheter Ch and the blood vessel Ra at the site of interest of the subject M in the first imaging direction. In addition, the user compares the reference image LR2 with the collected image LF2 to understand the positional relationship between the catheter Ch and the blood vessel Ra at the site of interest in the second imaging direction. By understanding the accurate positional relationship between the catheter Ch and the blood vessel Ra, the user can operate the catheter Ch to perform diagnostic and treatment actions.

[0159] In the second embodiment, similarly to the first embodiment, the comparison operation of the reference image LR and the collected image LF is performed in a state where the layout of the information display image D is changed. By performing the operation of changing the layout, the reference image LR and the collected image LF to be compared are placed in an adjacent state. Therefore, when the line of sight is alternately directed toward the reference image LR and the collected image LF to be compared, the content of the image information K can be prevented from hindering the user from conducting a comparative study. Therefore, the fatigue of the user when performing the comparison operation of the reference image LR and the collected image LF can be reduced.

[0160] Furthermore, in the second embodiment, since the layout of the information display image D is changed in advance in step F0 before the start of X-ray photography, the reference image LR and the collected image LF are already displayed in an adjacent state when the reference image LR and the collected image LF are displayed on the image display unit 49. Therefore, it is not necessary to perform an operation of changing the layout during the operation, so the time required for the operation can be further reduced. The user completes the operation of the catheter Ch using each information display image D whose layout has been changed, and thus a series of steps related to angiography using the X-ray fluoroscopic imaging device 1 are completed.

[0161] (Effects obtained by the structure of the embodiment)

[0162] (Item 1) The X-ray fluoroscopy apparatus according to the present embodiment comprises: an X-ray tube that irradiates an object with X-rays; an X-ray detector that detects X-rays that have passed through the object; an arm that supports the X-ray tube and the X-ray detector so that they face each other; an arm rotation mechanism that rotates the arm around a predetermined axis; an X-ray image generating unit that generates an X-ray image using a detection signal output by the X-ray detector; and an X-ray image display device that displays the X-ray image, wherein the X-ray image display device comprises: an image display unit that can display information display images in a matrix arrangement, the information display image having a function of displaying a portion of interest that is captured in a predetermined portion of interest. an X-ray image display area for the X-ray image arranged in a position and an image information display area for displaying information related to the X-ray image; an information display area change indication unit, which is used to input an indication for changing the position of the image information display area in the information display image in such a manner that at least two of the X-ray image display areas are displayed adjacent to each other; and an image display control unit, which controls the image display unit based on the content of the indication input to the information display area change indication unit, so as to change the position of the image information display area in the information display image in such a manner that the X-ray image display areas are displayed adjacent to each other.

[0163] use Figures 18 to 21 The effect of the X-ray fluoroscopic imaging device described in the first item is described below. In the conventional X-ray fluoroscopic imaging device, in the information display image E obtained by adding the image information V to the X-ray image N, the positional relationship between the X-ray image N and the image information V does not change. Therefore, as an example, in the case where the X-ray image N is always located on the right side of the image information V in the information display image E, if the two information display images E are arranged in the left-right direction, the image information V will hinder the contrast operation of the X-ray image N. That is, if Fig.18 As shown, when the X-ray image N1 contained in the information display image E1 (as an example, a collection image) and the X-ray image N2 contained in the information display image E2 (as an example, a reference image) are visually identified and compared, the image information V2 contained in the information display image E2 hinders the performance of the action.

[0164] In addition, as a way to avoid Fig.18 The method for solving the problem shown in the figure can be given as the following comparative example: when the X-ray image N is the collected image NF and when the X-ray image N is the reference image NR, the positional relationship between the X-ray image N and the image information V in the information display image E is made different in each case. In this comparative example, Fig.19As shown in (a) of FIG. 1 , when the X-ray image N is the collected image NF, the X-ray image N is always arranged on the left side of the image information V in the information display image E. Furthermore, when the X-ray image N is the reference image NR, as shown in FIG. Fig.19 As shown in (b) of FIG. 1 , the X-ray image N is always arranged on the right side of the image information V in the information display image E.

[0165] In such a comparative example, Fig. 20 When the information display image E (information display image EF) including the collected image NF is arranged adjacent to the left side of the information display image E (information display image ER) including the reference image NR as shown in FIG. Fig.18 That is, when the information display image EF is arranged on the left side of the information display image ER, since the collected image NF and the reference image NR are adjacent in the left-right direction, it is possible to avoid the image information V interfering with the operation of comparing the collected image NF with the reference image NR.

[0166] However, in such a comparative example, it is difficult to reliably avoid Fig.18 The problem is shown. That is, when visually recognizing and comparing the collected image NF and the reference image NR, the preferred arrangement pattern of the collected image NF and the reference image NR differs among users. That is, there are users who prefer to arrange the collected image NF on the left side of the reference image NR for comparison, while there are users who prefer to arrange the collected image NF on the upper side of the reference image NR for comparison.

[0167] Moreover, in the Fig.19 In the comparison example of the structures of (a) and (b), the problem that the image information V hinders the comparison study can be avoided only when the information display image EF is arranged on the left side of the information display image ER. Fig.21 When the information display image EF is arranged on the right side of the information display image ER as shown, since two pieces of image information V exist between the collected image NF and the reference image NR, the operation of comparing the collected image NF with the reference image NR becomes more difficult.

[0168] Furthermore, in this comparative example, when the information display image EF and the information display image ER are arranged in the vertical direction, a new problem will arise. Fig. 22When the information display image EF is arranged on the upper side of the information display image ER as shown, the positions of the information display image EF and the information display image ER coincide with each other in the left-right direction G. However, in the information display image EF, the image information V is arranged on the left side of the collected image NF, while in the information display image ER, the image information V is arranged on the right side of the reference image NR.

[0169] As a result, the position of the collected image NF differs from the position of the reference image NR in the left-right direction G, so the user needs to keep moving the line of sight in an oblique direction when comparing the collected image NF with the reference image NR. For example, when comparing the central part Fo of the information display image EF with the central part Ro of the information display image ER, the user needs to move the line of sight along the Fig.21 The track indicated by the arrow YG in the figure continuously moves back and forth in the oblique direction, and the content of each image is compared while modifying the position offset CP between the collected image NF and the reference image NR in the left-right direction G in the mind. Compared with the action of comparing the collected image NF and the reference image NR whose positions are offset only in the left-right direction or the up-down direction, comparing the collected image NF and the reference image NR whose positions are offset only in the left-right direction or the up-down direction Fig. 20 The operation of comparing the collected image NF shifted in the oblique direction with the reference image NR as shown may increase the burden on the user.

[0170] With regard to such a conventional structure, the X-ray fluoroscopic imaging apparatus 1 according to the first item includes an image display device 11 for displaying an X-ray image L captured in a predetermined region of interest, and the image display device 11 includes an image display unit 49, an input unit 51, and an image display control unit 57. In the image display unit 49 of the image display device 11, information display images D including the X-ray image L and image information K are arranged and displayed in a matrix.

[0171] The input unit 51 is configured to be capable of inputting an instruction for changing the position of the X-ray image L and the position of the image information K in the information display image D so that at least two X-ray images L are displayed adjacent to each other. The image display control unit 57 controls the image display unit 49 based on the instruction input to the input unit 51 so that the X-ray images L are displayed adjacent to each other.

[0172] That is, unlike the conventional apparatus in which the positional relationship between the X-ray image L and the image information K in the information display image D is unchanged, the X-ray fluoroscopic imaging apparatus 1 described in the first item is configured to be able to change the positional relationship between the X-ray image L and the image information K in the information display image D. Therefore, even when the mode of arranging the plurality of information display images D in a matrix form in the image display unit 49 is appropriately changed according to the user's request, it is possible to newly change the setting of the positional relationship between the X-ray image L and the image information K in the information display image D so that the X-ray images L are adjacent to each other in the changed arrangement mode of the information display image D. Therefore, when comparing the X-ray images L in the plurality of information display images D, the arrangement mode of the information display image D can be changed according to the user's request, and it is possible to reliably avoid the image information K from existing between the X-ray images L to be compared. That is, when comparing the X-ray images, it is possible to avoid the image information K from interfering with the comparison operation, and thus it is possible to reduce the burden required for the operation of comparing the X-ray images.

[0173] (Item 2) The X-ray fluoroscopy apparatus of the present embodiment comprises: an X-ray tube that irradiates an object with X-rays; an X-ray detector that detects the X-rays that have passed through the object; an arm that supports the X-ray tube and the X-ray detector so that they face each other; an arm rotation mechanism that rotates the arm around a predetermined axis; an X-ray image generating unit that generates an X-ray image using a detection signal output by the X-ray detector; and an X-ray image display device that displays the X-ray image, wherein the X-ray image display device comprises: an image display unit that can display information display images in a matrix arrangement, the information display image having a display image. An X-ray image display area of ​​the X-ray image of a specified part of interest, and an image information display area displaying information related to the X-ray image; an information display position setting unit, which pre-sets the position of the image information display area in the information display image in accordance with a pattern of positional relationship in which the information display images are arranged and displayed, so that the X-ray image display areas are displayed adjacent to each other; and an image display control unit, which controls the image display unit by determining a pattern of positional relationship in which the information display images are arranged and displayed, so that the position of the image information display area in the information display image becomes the position set by the information display position setting unit.

[0174] According to the X-ray fluoroscopic imaging apparatus described in the second item, the image display device 11 is provided for displaying an X-ray image L in which a predetermined region of interest is captured, and the image display device 11 is provided with an image display unit 49, a layout setting unit 55, and an image display control unit 57. In the image display unit 49 of the image display device 11, information display images D having the X-ray image L and image information K are arranged and displayed in a matrix.

[0175] The layout setting unit 55 pre-sets the position of the image information K in the information display image D so that the X-ray images L are displayed adjacent to each other, based on the pattern of the positional relationship in which the information display images D are arranged and displayed. The image display control unit 57 controls the image display unit 49 based on the position of the image information K in the information display image D set by the layout setting unit 55 so that the X-ray images L are displayed adjacent to each other.

[0176] Thus, in the X-ray fluoroscopic imaging apparatus described in the second item, the position of the image information K in the information display image D can be preset before generating the X-ray image L. That is, the X-ray images L can be displayed adjacent to each other without changing the position of the image information K during the operation, so the burden required for the operation of comparing the X-ray images can be reduced, and the process and time required for the operation can be further shortened.

[0177] (Item 3) In addition, in the X-ray fluoroscopic imaging device described in Item 1 or Item 2, the image display unit displays the information display image including a reference image and the information display image including a collected image in an arranged manner, wherein the reference image is the X-ray image of a state in which blood vessels at a specified site of interest are angiographically imaged, and the collected image is the most recently generated X-ray image in a state in which blood vessels at the site of interest are not angiographically imaged, and the image display control unit controls the image display unit so that the reference image is displayed adjacent to the collected image.

[0178] According to the X-ray fluoroscopy apparatus described in the third item, the image display unit 49 displays the information display image DR and the information display image DF in parallel. The information display image DR includes the reference image LR, and the information display image DF includes the collection image LF. The reference image LR is an X-ray image L in which the blood vessels at the predetermined part of interest are stained. The collection image LF is the latest X-ray image L in which the blood vessels at the predetermined part of interest are not stained.

[0179] Then, the image display control unit 57 controls the image display unit 49 so that the reference image LR is displayed adjacent to the collected image LF. That is, the position of the image information K in the information display image DR or the position of the image information K in the information display image DF is changed by the image display control unit 57. Therefore, the user can visually recognize the reference image in which the angiographic blood vessels are captured and confirm the position of the blood vessels, and can perform surgery on the latest part of interest captured in the collected image with high accuracy. That is, it is possible to avoid the image information K interfering with the operation of comparing the collected image with the reference image, and to perform surgery based on angiography photography in an ideal manner.

[0180] <Other Implementation Methods>

[0181] In addition, the embodiments disclosed this time are illustrative in all aspects and are not restrictive. The scope of the present invention includes the claims and all changes within the meaning and scope equivalent to the claims. As an example, the present invention can be modified and implemented as follows.

[0182] (1) In the above-mentioned embodiments, the images arranged in a matrix on the image display unit 49 are not limited to the collected images LF and the reference images LR. As an example, ultrasonic images may be arranged in a matrix together with the collected images or the reference images. In this case, the user performs surgery while comparing the collected images, the reference images, and the ultrasonic images.

[0183] (2) In the above-described embodiment or modification, as an arrangement pattern for arranging and displaying a plurality of information display images D on the image display unit 49, the following pattern is exemplified: two information display images D are arranged and displayed in the left-right direction G, and two information display images D are arranged and displayed in the up-down direction H. However, the arrangement pattern is not limited to such a 2×2-column arrangement pattern. Three or more information display images D may be arranged in the left-right direction G, and three or more information display images D may be arranged in the up-down direction H.

[0184] (3) In the above-mentioned embodiment or modification, the configuration is not limited to the configuration in which the image information K and the X-ray image L are adjacent to each other in the left-right direction G. In other words, the configuration position of the image information K in the information display image D is the left side or the right side of the X-ray image L, but the configuration is not limited to this. That is, the following configuration may be adopted: in the information display image D, the X-ray image L and the image information K are adjacent to each other in the up-down direction H.

[0185] Fig. 22 FIG. 2 shows a structure in which the X-ray image L is arranged below the image information K in each information display image D in the initial state. Fig. 22In FIG. 1 , as an arrangement pattern for displaying a plurality of information display images D, a pattern in which three columns of information display images D are arranged in the left-right direction G and two columns of information display images D are arranged in the up-down direction is exemplified. Fig. 22 In the initial state shown, as an example, in three information display images D arranged in the upper layer among the six information display images D, the X-ray images L are adjacent to each other in the left-right direction G. Therefore, it is possible to avoid the image information K interfering with the comparison operation of the three X-ray images arranged in the left-right direction G.

[0186] However, in Fig. 22 In the initial state shown, the image information K prevents the operation of comparing the X-ray images L in the vertical direction H. That is, since the image information K is arranged between two X-ray images L arranged in the vertical direction, when the operation of comparing the two X-ray images L is performed, the image information K prevents the operation.

[0187] Therefore, in the initial state Fig. 22 In the case of the arrangement mode shown in FIG. 1 , the operation of changing the layout of the information display images D is performed on the three information display images D arranged in the lower layer among the six information display images D, similarly to step S4 in Example 1 or step F0 in Example 2. That is, the user operates the input unit 51 or the like to input instructions for changing the positional relationship between the X-ray image L and the image information K to each of the three information display images D. Specifically, an instruction to change the layout of the information display image D is input in such a manner that the image information K arranged on the upper side of the X-ray image L is moved downward to arrange the image information K on the lower side of the X-ray image L.

[0188] The layout setting unit 55 accepts the content of the input instruction, maintains the layout setting of the three information display images D arranged in the upper layer among the six information display images D in the initial state, and changes the layout setting of the three information display images D arranged in the lower layer in such a way that the X-ray image L is arranged on the upper side of the image information K.

[0189] The image display control unit 57 controls the image display unit 49 so that each information display image D is displayed according to the layout setting changed by the layout setting unit 55. As a result, Fig.23 As shown, the X-ray image L is arranged below the image information K for the three information display images D arranged in the upper layer, and on the other hand, the X-ray image L is arranged above the image information K for the three information display images D arranged in the lower layer.

[0190] By changing the layout settings to Fig.23In the arrangement pattern shown, the X-ray images L are also arranged adjacent to each other in the vertical direction H. Therefore, the user can avoid not only the image information K interfering with the operation of comparing the plurality of X-ray images L arranged adjacent to each other in the horizontal direction G, but also the image information K interfering with the operation of comparing the plurality of X-ray images L arranged adjacent to each other in the vertical direction H.

[0191] Description of Reference Numerals

[0192] 1: X-ray fluoroscopic imaging device; 3: top plate; 5: first imaging mechanism; 7: second imaging mechanism; 9: image processing device; 11: image display device; 13: X-ray tube; 15: X-ray detector; 16: collimator; 17: C-arm; 19: sliding mechanism; 21: rotating mechanism; 23: support; 25: supporting base; 27: X-ray tube; 29: X-ray detector; 31: C-arm; 33: sliding mechanism; 35: rotating mechanism; 39: X-ray irradiation control unit; 41: drive control unit; 43: image generation unit; 45: storage unit; 47: operation table; 49: image display unit; 51: input unit; 53: layout storage unit; 55: layout setting unit; 57: image display control unit; D: information display image; L: X-ray image; K: image information; LF: collected image; LR: reference image.

Claims

1. An X-ray fluoroscopic imaging device, comprising: An X-ray tube that irradiates an object with X-rays; An X-ray detector for detecting X-rays that have passed through the subject; an arm that supports the X-ray tube and the X-ray detector so that they face each other; an arm rotation mechanism that rotates the arm about a specified axis; an X-ray image generating unit that generates an X-ray image using the detection signal output by the X-ray detector; and an X-ray image display device which displays the X-ray image, Wherein, the X-ray image display device comprises: an image display unit capable of arranging and displaying information display images in a matrix, the information display images having an X-ray image display area for displaying the X-ray image captured in a predetermined region of interest and an image information display area for displaying information related to the X-ray image; an information display area change instruction unit for inputting an instruction to change the position of the image information display area in the information display image in such a manner that at least two of the X-ray image display areas are displayed adjacent to each other, with respect to the information display image arranged and displayed on the image display unit; and An image display control unit controls the image display unit based on the content of the instruction input to the information display area change instruction unit so as to change the position of the image information display area in the information display image in such a way that the X-ray image display areas are displayed adjacent to each other.

2. An X-ray fluoroscopic imaging device, comprising: An X-ray tube that irradiates an object with X-rays; An X-ray detector for detecting X-rays that have passed through the subject; an arm that supports the X-ray tube and the X-ray detector so that they face each other; an arm rotation mechanism that rotates the arm about a specified axis; an X-ray image generating unit that generates an X-ray image using the detection signal output by the X-ray detector; and an X-ray image display device which displays the X-ray image, Wherein, the X-ray image display device comprises: an image display unit capable of arranging and displaying information display images in a matrix, the information display images having an X-ray image display area for displaying the X-ray image captured in a predetermined region of interest and an image information display area for displaying information related to the X-ray image; an information display position setting unit that pre-sets the position of the image information display area in the information display image in such a manner that the X-ray image display areas are displayed adjacent to each other, based on a pattern of positional relationship in which the information display image is arranged and displayed; and An image display control unit controls the image display unit by determining a pattern of positional relationship in which the information display images are arranged and displayed so that the position of the image information display area in the information display image becomes the position set by the information display position setting unit.

3. The X-ray fluoroscopic imaging device according to claim 1, wherein: The image display unit displays the information display image including a reference image and the information display image including a collected image in a row, wherein the reference image is the X-ray image in which a blood vessel at a predetermined site of interest is angiographically imaged, and the collected image is the most recently generated X-ray image in which a blood vessel at the site of interest is not angiographically imaged, The image display control unit controls the image display unit so that the reference image is displayed adjacent to the collected images.

Images