X-ray fluoroscopy equipment

Abstract

The present invention comprises a rotatable C-arm 17 that supports and causes an X-ray tube 13 and an X-ray detector 15 to face each other, an image generating unit 43 that uses a detected signal of the x-ray detector 15 to generate an X-ray image L, and an image display device 11 that displays the X-ray image L. The image display device 11 comprises: an image display unit 49 capable of displaying information display images D in parallel in a matrix shape; an input unit 51 for inputting an instruction for changing the position where image information K is displayed in the information display images D so that at least two X-ray images L are displayed adjacent to each other among the information display images D; and an image display control unit 57 that controls the image display unit 49 so that the X-ray images L are displaced adjacent to each other, on the basis of the content of the instruction.

Description

[Technical Field]

[0001] The present invention relates to an X-ray fluoroscopic imaging apparatus. [Background technology]

[0002] In the medical field, for example, when performing an angiography examination using a catheter procedure, an X-ray fluoroscopy device that performs X-ray fluoroscopy or X-ray photography is indispensable. In this procedure, fluoroscopy is performed by irradiating X-rays from any direction onto the subject's circulatory system. While referring to the X-ray image data obtained by fluoroscopy, the operator operates the catheter appropriately and proceeds with the procedure.

[0003] A conventional X-ray fluoroscopy device includes a tabletop on which a subject is placed, an imaging system consisting of an X-ray tube and an X-ray detector, and a C-shaped arm (C-arm) that supports the imaging system. The X-ray tube and X-ray detector are provided at one end and the other end of the C-arm, and the C-arm is arranged so that the X-ray tube and the X-ray detector are positioned opposite each other with the subject in between. The C-arm is configured to be slidable along an arc path that follows the shape of the arm. In addition, the C-arm is supported by a rotatable rotation mechanism, and can rotate around a predetermined axis in accordance with the rotation of the rotation mechanism. Therefore, a user can irradiate X-rays from a desired angle to obtain a fluoroscopic or radiographic X-ray image at that angle.

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

[0005] When performing angiography using a biplane X-ray fluoroscopy device, the user inserts a catheter into the subject and reaches the area of ​​interest. Then, a contrast agent is injected through the catheter into the blood vessels at the area of ​​interest, and X-ray imaging is performed with the blood vessel outlines visualized, thereby obtaining X-ray image data for a contrast-enhanced image (reference image). The X-ray image data for the reference image is then displayed on an image display device, along with the X-ray image data (acquired images) acquired in real time. The user operates the catheter to proceed with the procedure while comparing the reference image, which shows the contrast agent, with the acquired image, which shows the nearest area of ​​interest. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-158658 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the conventional example having such a configuration has the following problems.

[0008] Each piece of X-ray image data acquired by an X-ray fluoroscopy device is displayed on an image display device with an information display area attached to the image display area, which is the area where the X-ray image is displayed. The information display area is an area where information about the X-ray image, such as the X-ray irradiation conditions or the X-ray irradiation angle, is displayed, and is essential for X-ray image data. Here, for each piece of X-ray image data, the positional relationship between the image display area and the information display area is fixed. As an example, the information display area is located on the left side of the image display area. Therefore, when the X-ray image data of an acquired image and the X-ray image data of a reference image are displayed side by side on an image display device, the information display area of ​​the acquired image or the information display area of ​​the reference image will be displayed between the image display area of ​​the acquired image and the image display area of ​​the reference image.

[0009] This display mode forces the user to view the image display area every time they compare the X-ray image of the acquired image with the X-ray image of the reference image. As a result, the information displayed in the information display area interferes with the user's ability to compare and examine the X-ray images, making it difficult to proceed with the procedure quickly and increasing the burden on the user.

[0010] The present invention has been made in view of the above circumstances, and has an object to provide an X-ray fluoroscopic imaging apparatus that allows a plurality of displayed X-ray images to be easily compared and examined. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention has the following configuration. That is, a first aspect of the present invention is an X-ray image display device comprising: an X-ray tube for irradiating an object with X-rays; an X-ray detector for detecting X-rays transmitted through the object; an arm for supporting the X-ray tube and the X-ray detector so as to face each other; an arm rotation mechanism for rotating the arm around a predetermined axis; an X-ray image generating unit for generating an X-ray image using a detection signal output by the X-ray detector; and an X-ray image display device for displaying the X-ray image, wherein the X-ray image display device has an information display screen having an X-ray image display area in which the X-ray image showing a predetermined region of interest is displayed and an image information display area in which information about the X-ray image is displayed. The present invention relates to an X-ray fluoroscopy device that includes an image display unit that can display images in parallel in a matrix, an information display area change instruction unit that inputs an instruction to change the position of the image information display area in the information display image so that at least two of the X-ray image display areas are displayed adjacent to each other for the information display image that is displayed in parallel on the image display unit, and an image display control unit that controls the image display unit to change the position of the image information display area in the information display image so that the X-ray image display areas are displayed adjacent to each other based on the content of the instruction input to the information display area change instruction unit.

[0012] A second aspect of the present invention 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 generation 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 has an X-ray image display area in which the X-ray image showing a predetermined region of interest is displayed and an image information display area in which information about the X-ray image is displayed. The present invention relates to an X-ray fluoroscopy device that includes an image display unit that can display information display images in parallel in a matrix, an information display position setting unit that sets in advance the positions of the image information display areas in the information display image so that the X-ray image display areas are displayed adjacent to each other depending on the positional relationship pattern in which the information display images are displayed in parallel, and an image display control unit that controls the image display unit by determining the positional relationship pattern in which the information display images are displayed in parallel 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. [Effects of the Invention]

[0013] According to a first aspect of the present invention, an image display device 11 is provided that displays an X-ray image of a predetermined region of interest, and the X-ray image display device comprises 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 displayed in parallel in a matrix.

[0014] The input unit 51 is configured to be able to input an instruction to change the position of the X-ray image display area and the position of the image information display area in the information display image so 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 in accordance with the instruction input to the input unit 51 so that the X-ray image display areas are displayed adjacent to each other.

[0015] That is, unlike conventional devices in which the positional relationship between the X-ray image display area and the image information K in the information display image is fixed, the X-ray fluoroscopy device according to the first aspect is configured 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 if the pattern in which multiple information display images are arranged in a matrix on the image display unit is changed as needed 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 changed again so that the X-ray image display areas are adjacent to each other in the changed arrangement pattern of the information display images. Therefore, when comparing X-ray images in multiple information display images, it is possible to reliably prevent the image information display area from being present between the X-ray images to be compared, while changing the arrangement pattern of the information display images according to the user's request. That is, since the image information display area does not interfere with the operation of comparing the X-ray images, the operation of comparing the X-ray images can be performed more easily.

[0016] According to a second aspect of the present invention, an X-ray image display device is provided that displays an X-ray image of a predetermined area of ​​interest, and the X-ray image display device is provided with an image display unit, an information display position setting unit, and an image display control unit. On the image display unit, information display images each having an X-ray image display area and an image information display area are displayed in parallel in a matrix.

[0017] The information display position setting unit sets in advance the positions of the image information display areas in the information display image in accordance with a positional relationship pattern in which the information display images are displayed side by side so that the X-ray image display areas are displayed adjacent to each other. The image display control unit controls the image display unit to display the X-ray image display areas adjacent to each other based on the positions of the image information display areas in the information display image set by the information display position setting unit.

[0018] In this way, with the X-ray fluoroscopy device described in paragraph 2, the position of the image information display area in the information display image can be set in advance before generating an X-ray image. That is, since the X-ray image display areas can be displayed adjacent to each other without the need to change the position of the image information display area while the surgical procedure is in progress, the operation of comparing and examining the X-ray images can be performed more easily, and the steps and time required for the surgical procedure can be further shortened. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a front view illustrating the overall configuration of an X-ray fluoroscopic imaging apparatus according to a first embodiment. [Figure 2] 1 is a right side view illustrating the overall configuration of an X-ray fluoroscopic imaging apparatus according to a first embodiment. [Figure 3] 1 is a functional block diagram illustrating a schematic configuration of an X-ray fluoroscopic imaging apparatus according to a first embodiment. [Figure 4] FIG. 2 is a diagram showing a configuration of an information display image according to the first embodiment. [Figure 5] FIG. 2 is a diagram showing an example of a pattern in which a plurality of information display images according to the first embodiment are arranged. [Figure 6] 4 is a flowchart illustrating the operation of the X-ray fluoroscopic imaging apparatus according to the first embodiment. [Figure 7] FIG. 10 is a diagram illustrating step S1 according to the first embodiment. [Figure 8] FIG. 10 is a diagram illustrating step S2 according to the first embodiment. [Figure 9] FIG. 10 is a diagram illustrating step S3 according to the first embodiment. [Figure 10] FIG. 10 is a diagram illustrating step S4 according to the first embodiment. [Figure 11] FIG. 10 is a diagram illustrating step S4 according to the first embodiment. [Figure 12] 10 is a flowchart illustrating the operation of the X-ray fluoroscopic imaging apparatus according to the second embodiment. [Figure 13] FIG. 10 is a diagram illustrating step F0 according to the second embodiment. [Figure 14]FIG. 10 is a diagram illustrating step F0 according to the second embodiment. [Figure 15] FIG. 10 is a diagram illustrating step F0 according to the second embodiment. [Figure 16] FIG. 10 is a diagram illustrating step F2 according to the second embodiment. [Figure 17] FIG. 10 is a diagram illustrating step F3 according to the second embodiment. [Figure 18] FIG. 1 is a diagram illustrating a problem in a conventional configuration. [Figure 19] 10A and 10B are diagrams showing the configuration of an information display image according to a comparative example, in which (a) is a diagram showing the configuration of an information display image including a collection image, and (b) is a diagram showing the configuration of an information display image including a reference image. [Figure 20] FIG. 10 is a diagram illustrating a problem in a comparative example. [Figure 21] FIG. 10 is a diagram illustrating a problem in a comparative example. [Figure 22] FIG. 10 is a diagram showing a layout in an initial state of an information display image according to a modified example. [Figure 23] 10A and 10B are diagrams showing a state in which the layout of an information display image according to a modified example has been changed. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0020] A first embodiment of the present invention will be described below with reference to the drawings.

[0021] <Explanation of overall configuration> 1 and 2, the X-ray fluoroscopic imaging apparatus 1 according to the first embodiment includes a tabletop 3, a first imaging mechanism 5, and a second imaging mechanism 7. A subject M in a supine position is placed on the tabletop 3. Note that FIG. 1 shows a state in which the feet of the subject M are facing forward.

[0022] The first imaging mechanism 5 irradiates the subject M with X-rays, for example, from a vertical direction. 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.

[0023] The X-ray tube 13 irradiates X-rays onto the subject M. The X-ray detector 15 detects the X-rays irradiated from the X-ray tube 13 and converts them into an electrical signal. The X-ray tube 13 and the X-ray detector 15 are arranged opposite each other with the tabletop 3 in between. The X-ray tube 13 and the X-ray detector 15 constitute an imaging system. The collimator 16 is disposed in the X-ray tube 13 and limits the X-rays irradiated from the X-ray tube 13 to a predetermined shape. An example of the shape that the collimator 16 limits the X-rays is a pyramidal cone shape.

[0024] C-arm 17 is curved and has a substantially C-shape. X-ray tube 13 is provided on one end of C-arm 17, and X-ray detector 15 is provided on the other end of C-arm 17.

[0025] The slide mechanism 19 supports the C-arm 17 so that it can slide. That is, the C-arm 17 is configured to slide along an arc path of the C-arm 17 indicated by the symbol RA. The arc path RA is a path that follows 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 tabletop 3).

[0026] The rotation mechanism 21 is disposed on the side of the support column 23 and rotatably supports the slide mechanism 19. The rotation mechanism 21 is configured to be rotatable around a horizontal axis P (hereinafter also referred to as "around the body axis") that is parallel to the x direction (the longitudinal direction of the tabletop 3). The C-arm 17, which is held by the rotation mechanism 21 via the slide mechanism 19, rotates around the axis in the x direction in accordance with the rotation of the rotation mechanism 21. The arc path around the horizontal axis P is indicated by the symbol RB.

[0027] The C-arm 17 is configured to be rotatable about two orthogonal axes along the arcuate path RA and the arcuate path RB, respectively, so that X-rays can be irradiated from any direction onto the subject M. In Fig. 1, the X-ray tube 13 shows a state in which it irradiates X-rays onto the subject M in the z direction (a direction perpendicular to the support surface of the tabletop 3).

[0028] The support pillar 23 is supported by a support base 25 disposed on the floor surface and is configured to be able to move horizontally in the y direction (the short side direction of the tabletop 3). The rotation mechanism 21, slide mechanism 19, and C-arm 17 supported by the support pillar 23 move in the y direction in accordance with the horizontal movement of the support pillar 23.

[0029] The second imaging mechanism 7 irradiates the subject M with X-rays from a direction different from that of the first imaging mechanism 5. The second imaging mechanism 7 irradiates X-rays from a horizontal direction, for example. The second imaging mechanism 7 includes an X-ray tube 27, an X-ray detector 29, a C-arm 31, a slide mechanism 33, and a rotation mechanism 35.

[0030] 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 each other with the tabletop 3 in between, and form an imaging system. The collimator 30 is disposed on the X-ray tube 27 and limits the X-rays irradiated from the X-ray tube 27 to a predetermined shape. The C-arm 31 is curved and has a roughly C-shape. The X-ray tube 27 is provided on one end of the C-arm 31, and the X-ray detector 29 is provided on the other end of the C-arm 31. The slide mechanism 33 supports the C-arm 31 so that it can slide. In other words, the C-arm 31 is configured to slide along the arc path of the C-arm 31 indicated by the symbol RC.

[0031] The rotation mechanism 35 is disposed on the upper surface of the slide mechanism 33 and rotatably supports the slide mechanism 33. The rotation mechanism 35 is configured to be rotatable around a vertical axis Q that is parallel to the z direction (a direction perpendicular to the support surface of the tabletop 3). The C-arm 31, which is held by the rotation mechanism 35 via the slide mechanism 33, rotates around an axis in the z direction in accordance with the rotation of the rotation mechanism 35. The arc path around the vertical axis Q is indicated by the symbol RD. Because the C-arm 31 is configured to be rotatable around two orthogonal axes along each of the arc paths RC and RD, X-rays can be irradiated onto the subject M from any direction.

[0032] The rotation mechanism 35 is suspended from the ceiling T via a rail 36 and a ceiling travel section 37. The rail 36 extends in the x direction along the ceiling T. The ceiling travel section 37 is connected to the rotation mechanism 35 and is configured to be able to move back and forth in the x direction along the rail 36.

[0033] As described above, the X-ray fluoroscopy apparatus 1 according to the first embodiment is a so-called pipe-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, X-rays can be simultaneously irradiated onto the subject M from different angles.

[0034] 3, the X-ray fluoroscopy apparatus 1 further includes a main control unit 9 and an image display device 11. The main control unit 9 includes an information processing means such as a central processing unit (CPU) and controls the overall configuration of 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.

[0035] The X-ray irradiation control unit 39 is configured to independently control each of the X-ray tube 13 and the X-ray tube 27. The X-ray irradiation control unit 39 is configured to output a high voltage to each of the X-ray tube 13 and the X-ray tube 27. 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 X-ray irradiation are controlled.

[0036] The drive control unit 41 is configured to independently control the operation of each of the C-arms 17 and 31. The drive control unit 41 controls a drive mechanism (not shown) to appropriately control the rotation direction and rotation amount of each of the C-arms 17 and 31. The control of the drive control unit 41 adjusts the rotation angle of each of the C-arms 17 and 31 appropriately. The rotation angles of the C-arms 17 and 31 are detected by a rotation angle detector (not shown), such as a rotary encoder, and information on the rotation angles is sent to the main control unit 9 as needed.

[0037] The rotation directions of the C-arms 17 and 31 are expressed as follows. As shown in Fig. 1, the direction toward the head of the subject M in the direction of the body axis is hereinafter referred to as "CRA" (Cranial), and the direction toward the feet is hereinafter referred to as "CAU" (Caudal). As shown in Fig. 2, the direction of rotation toward the left as viewed from the head side around the body axis of the subject M is hereinafter referred to as "LAO" (Left Anterior Oblique), and the direction of rotation toward the right as viewed from the head side is hereinafter referred to as "RAO" (Right Anterior Oblique).

[0038] The rotation directions of the C-arms 17 and 31 are represented by a combination of the direction (CRA or CAU) in which each C-arm rotates in the direction of the body axis of the subject M and the direction (LAO or RAO) in which each C-arm rotates around the body axis of the subject M. The rotation angle of the C-arm 17 is represented by a combination of the angle by which the C-arm 17 rotates in the direction of the body axis of the subject M and the angle by which the C-arm 17 rotates around the body axis of the subject M. The rotation angle of the C-arm 31 is represented in the same way as the rotation angle of the C-arm 17.

[0039] The image generation unit 43 is provided after 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 output from the X-ray detector 15 and the X-ray detector 29. That is, the image generation unit 43 generates each of the X-ray image captured by the first imaging mechanism 5 and the X-ray image captured by the second imaging mechanism 7. The image generation unit 43 also generates data for an information display image D by linking the data of the image information K to the data of the X-ray image L. Details of the image information K and the information display image D will be described later.

[0040] The X-ray fluoroscopy apparatus 1 further includes a storage unit 45 and an operation console 47. The storage unit 45 stores various information related to the X-ray fluoroscopy apparatus 1. Examples of the information stored in the storage unit 45 include information related to X-ray imaging conditions such as tube voltage and tube current, various X-ray images generated by the image generation unit 43, and information related to image processing by the image generation unit 43. An example of the storage unit 45 is a non-volatile memory.

[0041] The operation console 47 is used to input instructions from the operator regarding the operation of the X-ray fluoroscopy apparatus 1, and the main control unit 9 performs overall control in accordance with the instructions input by the user to the operation console 47. Examples of the operation console 47 include a keyboard input panel, a touch input panel, a mouse, a dial, a changeover switch, and a push button switch.

[0042] 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, i.e., the X-ray image L with image information K attached. An example of the image display unit 49 is a liquid crystal monitor. Examples of the configuration in which the image display unit 49 is disposed include a configuration in which it is suspended from the ceiling or a configuration in which it is mounted on a mobile cart. In this embodiment, as shown in FIG. 1, the image display unit 49 is a large-screen monitor suspended from the ceiling.

[0043] The input unit 51 is used to input instructions from an operator regarding the operation of the image display device 11, and various operations are performed in the image display device 11 according to the instructions input by the user to the input unit 51. Examples of the input unit 51 include a keyboard input panel, a touch input panel, and a mouse.

[0044] The layout storage unit 53 stores information relating to the layout of images to be displayed on the image display unit 49. In the present embodiment 1, the layout storage unit 53 stores an arrangement pattern for when a plurality of information display images D are displayed on the image display unit 49. The layout storage unit 53 is also configured to store the positional relationship between the X-ray image L and the image information K in each information display image D. The layout storage unit 53 stores predetermined initial state patterns (default patterns) for the arrangement patterns for the plurality of information display images D and the arrangement patterns for the X-ray image L and the image information K in the information display image D.

[0045] The layout setting unit 55 receives instructions from the operator via the input unit 51, and, in accordance with the operator's instructions, newly sets the positional relationship between the X-ray image L and the image information K in the information display image D. Furthermore, in accordance with the operator's instructions via the input unit 51, the layout setting unit 55 newly sets an arrangement pattern of the multiple information display images D on the display screen of the image display unit 49.

[0046] 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 in accordance with the arrangement pattern set by the layout setting unit 55.

[0047] <Configuration of information display image> Next, the configuration of the information display image D displayed on the image display unit 49 will be described. As shown in Fig. 4, 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 performing appropriate 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 that shows a region of interest in the subject M. The area in the information display image D where the X-ray image L is displayed corresponds to the X-ray image display area in this embodiment.

[0048] The image information K displays information about the attached X-ray image L. Examples of information displayed in the image information K include irradiation condition information J1 and irradiation direction information J2. The irradiation condition information J1 is information about the conditions under which X-rays are irradiated, and includes, for example, the tube voltage or tube current of the X-ray tube as well as information such as the X-ray irradiation time. The irradiation direction information J2 is information about the direction in which X-rays are irradiated, and includes, for example, information about the rotation angles of the C-arm 17 and the C-arm 31. The area in which the image information K is displayed in the information display image D corresponds to the image information display area in this embodiment.

[0049] In the information display image D, the X-ray image L and the image information K are arranged side by side. FIG. 4 shows the arrangement pattern of the X-ray image L and the image information K in the initial state. In the initial state, the area in the information display image D where the image information K is arranged is determined to be to the left of the area in which the X-ray image L is arranged. In the first embodiment, by providing an input unit 51 and a layout setting unit 55, the arrangement pattern of the X-ray image L and the image information K in the information display image D can be changed. The operation for changing the arrangement pattern will be described later. The input unit 51 corresponds to the information display area change instruction unit in this embodiment. The layout setting unit 55 corresponds to the information display position setting unit in this embodiment.

[0050] 5 shows the layout pattern of each information display image D when a plurality of X-ray images L are displayed on the image display unit 49. When performing angiography using a catheter Ch, an X-ray image L acquired with the blood vessels 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 an "acquired image LF") are acquired. The reference image LR and the acquired image LF are then displayed on the image display unit 49, and the position of the catheter Ch can be determined by comparing them.

[0051] When angiography is performed using the biplane X-ray fluoroscopic apparatus 1, X-ray images L are captured at different imaging angles of the subject M using each of the first imaging mechanism 5 and the second imaging mechanism 7, and each of the X-ray images L is displayed on the image display unit 49. That is, the acquired image LF and reference image LF captured using the first imaging mechanism 5, and the acquired image LF and reference image LF captured using the second imaging mechanism 7 are displayed on the image display unit 49.

[0052] The collected image LF captured using the first imaging mechanism 5 is referred to as collected image LF1, and is distinguished from collected image LF2, which is collected image LF captured using the second imaging mechanism 7. The reference image LR captured using the first imaging mechanism 5 is referred to as reference image LR1, and is distinguished from reference image LR2, which is reference image LR captured using the second imaging mechanism 7.

[0053] The image information K attached to each of the reference images FR1 and FR2 and the acquired images LF1 and LF2 is distinguished by assigning different symbols to them, namely, image information KR1, KR2, KF1, and KF2. Among the information display images D, the one in which the image information KR1 is attached to the reference image LR1 is called information display image DR1. Similarly, among the information display images D, the ones in which the X-ray image L is the reference image LR2, the acquired image LF1, and the acquired image LF2 are distinguished from each other by the information display images DR2, DF1, and DF2.

[0054] 5 shows an arrangement pattern of four information display images DR1, DR2, DF1, and DF2 in the initial state. The four information display images DR1, DR2, DF1, and DF2 are arranged in parallel in a matrix on the screen of the image display unit 49. In the initial arrangement pattern in Example 1, the information display images DF1 and DR1 acquired using the first imaging mechanism 5 are arranged in the upper row, and the information display images DF2 and DR2 acquired using the second imaging mechanism 7 are arranged in the lower row. Furthermore, the information display images DR1 and DR2 containing the reference image LR are arranged to the right of the information display images DF1 and DF2 containing the collected image LF.

[0055] <Overview of operation> Next, a description will be given of the operation of the X-ray fluoroscopy apparatus 1 according to the embodiment 1. Fig. 6 shows a flowchart relating to the operation of the X-ray fluoroscopy apparatus 1. In the embodiment 1, an example will be described in which angiography of cardiovascular blood vessels is performed by biplane imaging using the first imaging mechanism 5 and the second imaging mechanism 7.

[0056] Step S1 (Selection of placement pattern) First, before X-ray imaging of the subject M, an arrangement pattern for a plurality of information display images D on the image display unit 49 is selected. The user operates the operation console 47 to read out the arrangement patterns for the information display images D stored in the layout storage unit 53. Each of the read-out arrangement patterns is displayed on a display GS or the like provided on the operation console 47, as shown in FIG. 7. As arrangement patterns for the information display images D, as shown in FIG. 7, in addition to an arrangement pattern PT1 in which the reference image LR is arranged to the right of the acquired image LF, an arrangement pattern PT2 in which the reference image LR is arranged below the acquired image LF, and the like are preset. In other words, the arrangement pattern PT1 is an arrangement pattern of the information display images DR1, DR2, DF1, and DF2 as shown in FIG.

[0057] The user selects a pattern that is preferable for the progression of the surgical procedure from among the arrangement patterns of the information display image D. Here, it is assumed that the arrangement pattern PT1 is selected as the arrangement pattern of the information display image D in the initial state.

[0058] Step S2 (obtaining a reference image) After the layout pattern of the information display image D in the initial state is selected, a reference image is acquired. That is, the user inserts the catheter Ch into the body of the subject M and reaches the cardiac blood vessels of the subject M. After the catheter Ch reaches the cardiac blood vessels, which are the target location, the C-arm 17 of the first imaging mechanism 5 and the C-arm 31 of the second imaging mechanism 7 are each rotated to a predetermined rotation angle, and a contrast image is acquired as the reference image LR. The user administers a contrast agent into the blood vessels of the subject M from the tip of the catheter Ch.

[0059] After the contrast agent is administered, capturing of an X-ray image L begins. That is, the surgeon operates the console 47 to irradiate the subject M with 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. The X-ray detector 15 detects the X-rays that are irradiated from the X-ray tube 13 at the first imaging angle and have passed through the region of interest of the subject M, and outputs an X-ray detection signal. The X-ray detector 29 detects the X-rays that are irradiated from the X-ray tube 27 at the second imaging angle and have passed through the region of interest, and outputs an X-ray detection signal.

[0060] Image generation unit 43 generates an X-ray image L showing the angiographically enhanced blood vessels in the region of interest as a reference image LR1 based on the X-ray detection signal output by X-ray detector 15. Image generation unit 43 also generates an X-ray image L showing the angiographically enhanced blood vessels in the region of interest as a reference image LR2 based on the X-ray detection signal output by X-ray detector 29. Reference image LR1 and reference image LR2 are X-ray images of the same region of interest captured simultaneously from different imaging angles.

[0061] The image generation unit 43 generates an information display image D by attaching image information K to each of the reference image LR1 and the reference image LR2. That is, the image generation unit 43 generates an information display image DR1 by attaching image information KR1, which displays information such as the first shooting angle, to the reference image LR1 captured by the first imaging mechanism 5. The image generation unit 43 also generates an information display image DR2 by attaching image information KR2, which displays information such as the second shooting angle, to the reference image LR2 captured by the second imaging mechanism 7. The data of the generated information display image DR1 and information display image DR2 is transmitted to the image display device 11.

[0062] 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 layout pattern selected in step S1, as shown in Fig. 8. That is, the information display image DR1 is displayed in the upper right part of the image display unit 49, and the information display image DR2 is displayed in the lower right part of the image display unit 49. Furthermore, the information display image DR1 and the information display image DR2 are arranged so as to be adjacent to each other vertically.

[0063] After the contrast agent is administered into the blood vessels, the contrast agent diffuses along the blood flow over time, causing the blood vessels in the region of interest to become non-enhanced. Therefore, by acquiring reference images LR1 and LR2 while the blood vessels are in an enhanced state and displaying them on the image display unit 49, the position of the blood vessel Ra in the region of interest can be confirmed by referring to the reference images LR1 and LR2. When each of the information display images D including the reference images LR is acquired and displayed on the image display unit 49, the process of step S2 is completed.

[0064] Step S3 (Acquisition of collected images) After acquiring the reference image LR, the acquired image LF is acquired. The user again operates the console 47 to irradiate the subject M with X-rays from each of the X-ray tubes 13 and 27 at the same imaging angle as in step S2.

[0065] The image generation unit 43 generates an X-ray image L showing the nearest region of interest as an acquired image LF1 based on the X-ray detection signal output by the X-ray detector 15. The image generation unit 43 also generates an X-ray image L showing the nearest region of interest as an acquired image LF2 based on the X-ray detection signal output by the X-ray detector 29. The acquired images LF1 and LF2 are X-ray images of the same region of interest taken simultaneously from different imaging angles, and show an image of the catheter Ch in the nearest position.

[0066] The image generation unit 43 generates an information display image D by attaching image information K to each of the collected images LF1 and LF2. That is, the image generation unit 43 generates an information display image DF1 by attaching image information KF1 displaying information such as the first shooting angle to the collected image LF1 captured by the first imaging mechanism 5. The image generation unit 43 also generates an information display image DF2 by attaching image information KF2 displaying information such as the second shooting angle to the collected image LF2 captured by the second imaging mechanism 7. Data of the generated information display image DF1 and information display image DF2 is transmitted from the image generation unit 43 to the image display device 11.

[0067] 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 in accordance with the arrangement pattern selected in step S1, as shown in Fig. 9. That is, the information display image DF1 is displayed adjacent to the information display image DR1 on the left side, and the information display image DF2 is displayed adjacent to the information display image DR2 on the left side.

[0068] The user intermittently acquires acquired images LF to grasp the latest state of the catheter Ch. That is, X-rays are intermittently irradiated onto the subject M from each of the X-ray tubes 13 and 27. Each time X-rays are irradiated, the image generator 43 generates a new information display image DF1 and an information display image DF2. Therefore, the image display unit 49 displays the information display image DF1 and the information display image DF2, which show the catheter Ch in real time. When each of the information display images D, including the acquired image LF, is acquired and displayed on the image display unit 49, the process of step S3 is completed.

[0069] Step S4 (Change layout) In the initial state, in each information display image D, the X-ray image L is determined to be arranged to the right of the image information K. Therefore, at the time when step S3 is completed, the acquired image LF1 is arranged to the right of the image information KF1 in the information display image DF1, and the reference image LR1 is arranged to the right of the image information KR1 in the information display image DR1. Therefore, when the information display images DR1, DR2, DF1, and DF2 are displayed on the image display unit 49 in the initial arrangement pattern, the image information KR1 will be arranged between the acquired image LF1 and the reference image LR1. Furthermore, the image information KR2 will be arranged between the acquired image LF2 and the reference image LR2.

[0070] When performing a catheterization procedure using angiography, the user needs to alternately move their gaze between a reference image LR, which is a contrast-enhanced image, and an acquired image LF, which is a real-time image without contrast, to compare the two. Therefore, if image information K is positioned between the reference image LR and the acquired image LF, the image information K will interfere with the comparison operation. Therefore, in the first embodiment, the layout of the information display image DR1 is changed from its initial state by a user operation. That is, by changing the positional relationship between the image information KR1 and the reference image LR1, an operation is performed to position the acquired image LF1 and the reference image LR1 adjacent to each other.

[0071] To change the layout of the information display image DR1, the user operates the input unit 51 of the image display device 11 to input an instruction to place the collected image LF1 to the right of the reference image LR1. As an example, as shown in Fig. 10, the user operates the cursor CS on the screen of the image display unit 49 using a mouse or the like to select the area of ​​the image information KF1. Then, as an example, the user uses the mouse to drag the image information KF1 to the right.

[0072] The content of the instruction input by the user using the input unit 51 is accepted by the layout setting unit 55. Then, in accordance with the content of the instruction, 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. That is, in the information display image DR1, the initial arrangement pattern in which the image information KR1 is arranged to the left of the reference image LR1 is changed to an arrangement pattern in which the image information KR1 is arranged to the right of the reference image LR1.

[0073] The layout setting unit 55 transmits information about the arrangement pattern of the image information KR1 and the reference image LR1 after the change, i.e., the layout of the information display image DR1 after the change, to each of the layout storage unit 53 and the image display control unit 57. The layout storage unit 53 stores the setting of the layout of the information display image DR1 after the change.

[0074] The image display control unit 57 controls the image display unit 49 so that the manner in which the information display image DR1 is displayed on the image display unit 49 is changed according to the layout information of the information display image DR1 newly set by the layout setting unit 55. 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. That is, as shown in Fig. 10, in the information display image DR1, the image information KR1 is displayed to the right 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 (acquired image LF1) in the information display image DF1 are adjacent to each other in the left-right direction G.

[0075] Furthermore, by changing the layout, the entire sides of the reference image LR1 and the collected image LF1 match in the direction in which they are aligned (G direction). In other words, the position (height) of the reference image LR1 and the position (height) of the collected image LF1 match in the direction perpendicular to the alignment direction (H direction). By changing the layout so that the heights of the reference image LR1 and the collected image LF1 match, the user can compare the reference image LR1 and the collected image LF1 by moving their gaze parallel to the G direction. In other words, when comparing and examining the positions of the images reflected in the reference image LR1 and the collected image LF1, there is no need to move their gaze diagonally to consider the difference in height between the images, making it easier to compare the reference image LR1 and the collected image LF1.

[0076] After changing the layout of the information display image DR1 so that the reference image LR1 and the collected image LF1 are adjacent to each other, an operation to change the layout of the information display image DR2 is performed. That is, since the image information KR2 is arranged between the collected 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.

[0077] For example, the user selects image information KF2 and drags it to the right, thereby inputting an instruction to place image information KR2 to the right of reference image LR2. The user's operation is accepted by layout setting unit 55, and the layout of information display image DR2 is changed from a pattern in which image information KR2 is placed to the left of reference image LR2 to a pattern in which image information KR2 is placed to the right of reference image LR2.

[0078] The image display control unit 57 controls the image display unit 49 so that the information display image DR2 is displayed in accordance with the changed layout setting. As a result, as shown in FIG. 11, the image information KR2 is displayed to the right of the reference image LR2 in the information display image DR2. As a result, the X-ray image L (reference image LR2) in the information display image DR2 and the X-ray image L (acquired image LF2) in the information display image DF2 are adjacent to each other in the left-right direction G. Furthermore, the entire sides of the reference image LR2 and the acquired image LF2 coincide with each other in the direction in which they are arranged side by side (the G direction).

[0079] In this way, the layout of the information display image D is changed as appropriate to facilitate comparison between the reference image LR and the acquired 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.

[0080] Step S5 (Image comparison) After changing the layout of the information display image D, the surgical procedure is carried out while comparing the reference image LR with the acquired image LF. The user can grasp the positional relationship between the catheter Ch and the blood vessel Ra in the region of interest of the subject M by checking the real-time position of the catheter Ch displayed in the acquired image LF and the position of the angiographically enhanced blood vessel Ra displayed in the reference image LR.

[0081] That is, the user alternately looks at the reference image LR1 and the acquired image LF1 displayed on the image display unit 49 and compares the images to grasp the positional relationship between the catheter Ch and the blood vessel Ra in the region of interest of the subject M for the first imaging direction. The user also compares the reference image LR2 and the acquired image LF2 to grasp the positional relationship between the catheter Ch and the blood vessel Ra in the region of interest for the second imaging direction. By grasping the accurate positional relationship between the catheter Ch and the blood vessel Ra, the user operates the catheter Ch to proceed with the medical procedure.

[0082] In the first embodiment, the reference image LR and the collected image LF are compared with each other while changing the layout of the information display image D. That is, in the initial state, the reference image LR and the collected image LF are opposed to each other with the image information K therebetween, but by performing an operation to change the layout, the reference image LR and the collected image LF to be compared are placed adjacent to each other.

[0083] Therefore, when the user alternates between directing his or her gaze to the reference image LR and the collected image LF to be compared, the contents of the image information K can be prevented from interfering with the comparison. Furthermore, since the reference image LR and the collected image LF are adjacent to each other, the distance the user must move his or her gaze is shortened by the amount of the image information K. Therefore, the fatigue experienced by the user when comparing the reference image LR and the collected image LF can be reduced.

[0084] The collected image LF and the reference image LR, which are arranged adjacent to each other in the left-right direction G, have the same position (height) in the up-down direction H. Therefore, by moving the line of sight alternately left and right, the user can compare the collected image LF and the reference image LR without considering the positional deviation of the images in the up-down direction H.

[0085] Furthermore, while the surgical procedure is in progress, the user can compare the reference image LR with the acquired image LF, as well as the acquired images LF1 and LF2, which were taken in different directions. That is, by comparing the acquired images LF1 and LF2, which are adjacent to each other in the vertical direction H, the user can grasp the three-dimensional position of the catheter Ch and the three-dimensional structure of the region of interest in the subject M.

[0086] Because image information K is not arranged between acquired image LF1 and acquired image LF2, the user can avoid the image information K interfering with the user's gaze when alternately directing the gaze to acquired image LF1 and acquired image LF2. Furthermore, acquired image LF1 and acquired image LF2, which are arranged adjacent to each other in the vertical direction H, are positioned in the same position in the horizontal direction G. Therefore, by alternately moving the gaze in the vertical direction, the user can compare acquired image LF1 and acquired image LF2 without considering the positional deviation in the horizontal direction G. The user completes the operation of catheter Ch using each of the information display images D with the changed layout, thereby completing a series of steps related to angiography using the X-ray fluoroscopy apparatus 1. [Example]

[0087] Next, a second embodiment of the present invention will be described. In the first embodiment, the layout of the information display image D is changed after the subject M is irradiated with X-rays. That is, a reference image LR and an acquired image LF to be compared are generated and displayed on the image display unit 49, and then an operation is performed to change the layout of the information display image D including the reference image LR or the acquired image LF. Note that the configuration of the X-ray fluoroscopic imaging apparatus 1 according to the second embodiment is the same as that of the first embodiment, and therefore a detailed description of the configuration will be omitted.

[0088] On the other hand, in the second embodiment, the layout of the information display image D is changed in advance before X-rays are irradiated onto the subject M. That is, an operation for changing the layout of the information display image D is performed for each of the arrangement patterns of the information display images D stored in the layout storage unit 53 when the information display images D are to be displayed on the image display unit 49.

[0089] Here, an operation of the X-ray fluoroscopy apparatus 1 according to the embodiment 2 will be described. Fig. 12 shows a flowchart relating to the operation of the X-ray fluoroscopy apparatus 1 according to the embodiment 2. In the embodiment 2, as in the embodiment 1, an example will be described in which angiography of the cardiovascular system is performed by biplane imaging.

[0090] Step F0 (Layout Settings) In the second embodiment, as a preliminary step to performing angiography, an operation is performed to set the layout for each pattern in which a plurality of information display images D are arranged on the screen of the image display unit 49. In the image display device 11, the layout storage unit 53 stores arrangement patterns PT1, PT2, etc. of the information display images D as shown in FIG.

[0091] The user operates the operation console 47 or the like to read out the layout patterns of the information display image D stored in the layout storage unit 53. Each of the read-out layout patterns is displayed on the display GS or the like, as shown in FIG.

[0092] After the arrangement pattern of the information display image D is read out, the user selects an arrangement pattern to be used for the layout setting operation. Here, it is assumed that arrangement pattern PT1 is selected as the layout setting target. Information on the selected arrangement pattern PT1 is read out from the layout storage unit 53, and an image for changing the layout in arrangement pattern PT1 is displayed on the display screen of the image display unit 49, as shown in FIG.

[0093] 13, in arrangement pattern PT1, four information display images D are arranged in two rows in the left-right direction G and two rows in the up-down direction H. In other words, arrangement areas Da, Db, Dc, and Dd occupy the upper left, upper right, lower left, and lower right parts of the entire area of ​​arrangement pattern PT1. Arrangement areas Da, Db, Dc, and Dd are areas where information display images DR1, DR2, DF1, and DF2 are arranged.

[0094] Furthermore, placement area Da has placement area La and placement area Ka, and placement area Ka is configured to be located to the left of placement area La. Placement area La is the area where collected image LF1 is placed, and placement area Ka is the area where image information KF1 is placed. As shown in FIG. 13, on the screen of image display unit 49, information P1 is attached to placement area La, and information P2 is attached to placement area Ka. Information P1 is information that visually indicates that this is the area where collected image LF1 is placed. Information P2 is information that visually indicates that this is the area where image information KF1 is placed.

[0095] Furthermore, placement area Db has placement area Lb and placement area Kb. Placement area Lb is the area where reference image LR1 is placed, and placement area Kb is the area where image information KR1 is placed. Placement area Dc has placement area Lc and placement area Kc. Placement area Lc is the area where acquired image LF2 is placed, and placement area Kc is the area where image information KF2 is placed. Placement area Dd has placement area Ld and placement area Kd. Placement area Ld is the area where reference image LR2 is placed, and placement area Kd is the area where image information KR2 is placed. Note that, like placement area La and placement area Ka, each of placement areas Lb to Ld and placement areas Kb to Kd is provided with information that visually identifies the X-ray image or image information to be placed.

[0096] 13, the user can understand the positions where the reference image LR and the acquired image LF are arranged and the positions where the image information K is arranged. That is, when angiography is started in the initial state of arrangement pattern PT1, the user can understand that the image information KR1 is arranged between the reference image LR1 and the acquired image LF1, which are to be compared, and that the image information KR1 will interfere with the comparison operation.

[0097] Therefore, before starting angiography, the user performs an operation to change the layout of the arrangement pattern PT1. That is, first, the user performs an operation to change the layout of the arrangement pattern PT1 so that the arrangement area La, which is the area where the acquired image LF1 is displayed, and the arrangement area Lb, which is the area where the reference image LR1 is displayed, are adjacent to each other.

[0098] 14, the layout of placement area Db is changed so that placement area Kb is positioned to the right of placement area Lb by placing cursor CS on placement area Kb, the area where image information KR1 is displayed, and moving placement area Kb to the right, as shown in FIG. As a result of this change, placement area Ka is positioned to the left of placement area Lb, while placement area Kb is positioned to the right of placement area Lb. As a result, the layout of placement pattern PT1 is changed so that placement area La and placement area Lb are positioned adjacent to each other in the left-right direction.

[0099] The user also understands that in the initial state of placement pattern PT1, image information KR2 is placed between reference image LR2 and acquired image LF2, which are the objects to be compared, and that this image information KR2 will interfere with the comparison. Therefore, as shown in Figure 15, by placing cursor CS on placement area Kd and moving placement area Kd to the right, the layout of placement area Dd is changed so that placement area Kd is positioned to the right of placement area Ld. As a result, the layout of placement pattern PT1 is changed so that placement area Lc and placement area Ld are adjacently placed in the left-right direction.

[0100] After completing the operation to change the layout of arrangement pattern PT1 from its initial state, the user performs an operation to save the changed layout. This save operation causes the layout storage unit 53 to store arrangement pattern PT1 in its changed state. By storing the changed layout, the next time angiography is performed using arrangement pattern PT1, the operation to change the layout of arrangement pattern PT1 can be omitted. By changing the layout of arrangement pattern PT1, the process of step F0 is completed.

[0101] Step F1 (Select placement pattern) After the layout change operation is completed, angiography is started. That is, as in step S1 in the first embodiment, first, an arrangement pattern for the plurality of information-display images D in the image display unit 49 is selected. The user operates the operation console 47 to read out the arrangement patterns of the information-display images D stored in the layout storage unit 53 (FIG. 7). Then, from the read-out arrangement patterns, an arrangement pattern PT1 to be used is selected.

[0102] In step F0, the layout of the placement pattern PT1 is changed, and the placement pattern PT1 in the changed state is stored in the layout storage unit 53. Therefore, the placement pattern read out from the layout storage unit 53 has an arrangement as shown in Fig. 15. That is, placement area La and placement area Lb are arranged adjacent to each other in the left-right direction, and placement area Lc and placement area Ld are arranged adjacent to each other in the left-right direction.

[0103] Step F2 (obtaining a reference image) After the layout pattern of the information display image D in the initial state is selected, a reference image is acquired. The process of step F2 according to the second embodiment is the same as the process of step S2 according to the first embodiment. That is, the user inserts the catheter Ch into the body of the subject M and causes the catheter Ch to reach the cardiac blood vessels of the subject M. After the catheter Ch reaches the cardiac blood vessels, which are 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 each rotated to a predetermined rotation angle, and a contrast image is acquired as the reference image LR. The user administers a contrast agent into the blood vessels of the subject M from the tip of the catheter Ch.

[0104] After the contrast agent is administered, capturing of an X-ray image L begins. That is, the surgeon operates the console 47 to irradiate the subject M with 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. The X-ray detector 15 detects the X-rays that are irradiated from the X-ray tube 13 at the first imaging angle and have passed through the region of interest of the subject M, and outputs an X-ray detection signal. The X-ray detector 29 detects the X-rays that are irradiated from the X-ray tube 27 at the second imaging angle and have passed through the region of interest, and outputs an X-ray detection signal.

[0105] The image generation unit 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. The image generation unit 43 also generates an information display image DR1 by adding image information KR1 to the reference image LR1. The image generation unit 43 also generates an information display image DR2 by adding image information KR2 to the reference image LR2. The data of the generated information display image DR1 and information display image DR2 is transmitted to the image display device 11.

[0106] 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 out in step F1.

[0107] That is, the information display image DR1 is displayed in the display area Db after the layout change, as shown in Fig. 16. That is, the reference image LR1 is displayed at the position of the display area Lb, and the image information KR1 is displayed to the right of the reference image LR1 (at the position of the display area Kb). Also, 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 to the right of the reference image LR2 (at the position of the display area Kd). When each of the information display images DR1 and DR2 is acquired and displayed on the image display unit 49, the process of step S2 is completed.

[0108] Step F3 (Acquisition of collected images) After acquiring each of the reference images LR, an acquired image LF is acquired. The process of step F3 according to the second embodiment is the same as the process of step S3 according to the first embodiment. That is, the user again operates the console 47 to irradiate the subject M with X-rays from each of the X-ray tubes 13 and 27 at the same imaging angle as in step F2.

[0109] The image generation unit 43 generates an X-ray image L showing the nearest region of interest as an acquired image LF1 based on the X-ray detection signal output by the X-ray detector 15. The image generation unit 43 also generates an X-ray image L showing the nearest region of interest as an acquired image LF2 based on the X-ray detection signal output by the X-ray detector 29. The image generation unit 43 generates an information display image DF1 by adding image information KF1 to the acquired image LF1. The image generation unit 43 also generates an information display image DF2 by adding image information KF2 to the acquired image LF2. The data of the generated information display image DF1 and information display image DF2 are transmitted from the image generation unit 43 to the image display device 11.

[0110] 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 out in step F1.

[0111] That is, the information display image DF1 is displayed in the display area Da after the layout change, as shown in Fig. 17. That is, the collected image LF1 is displayed at the position of the display area La, and the image information KF1 is displayed to the left of the collected image LF1 (at the position of the display area Ka). Also, the information display image DF2 is displayed in the display area Dc after the layout change. That is, the collected image LF2 is displayed at the position of the display area Lc, and the image information KF2 is displayed to the left of the collected image LF2 (at the position of the display area Kc).

[0112] Therefore, the collected image LF1 and the reference image LR1 captured by the first imaging mechanism 5 are displayed adjacent to each other in the left-right direction G. The collected image LF2 and the reference image LR2 captured by the second imaging mechanism 7 are also displayed 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 adjacent to each other.

[0113] The user intermittently acquires acquired images LF to grasp the latest state of the catheter Ch. Every time X-rays are irradiated, the image generation unit 43 generates new information display images DF1 and DF2, which are displayed on the image display unit 49. When the information display images DF1 and DF2, including the acquired images LF, are displayed on the image display unit 49, the process of step S3 is completed.

[0114] Step F4 (Image Comparison) After each of the reference images LR and each of the acquired images LF are displayed on the image display unit 49, the surgical procedure is carried out while comparing the reference images LR and the acquired images LF. The process of step F4 according to the second embodiment is common to the process of step S5 according to the first embodiment. That is, the user grasps the positional relationship between the catheter Ch and the blood vessel Ra in the region of interest of the subject M by checking the real-time position of the catheter Ch displayed in the acquired images LF and the position of the angiographically enhanced blood vessel Ra displayed in the reference images LR.

[0115] The user alternately looks at the reference image LR1 and the acquired image LF1 displayed on the image display unit 49 and compares the images to grasp the positional relationship between the catheter Ch and the blood vessel Ra in the region of interest of the subject M for the first imaging direction. The user also compares the reference image LR2 and the acquired image LF2 to grasp the positional relationship between the catheter Ch and the blood vessel Ra in the region of interest for the second imaging direction. By grasping the accurate positional relationship between the catheter Ch and the blood vessel Ra, the user operates the catheter Ch to proceed with the medical procedure.

[0116] In the second embodiment, similarly to the first embodiment, the operation of comparing the reference image LR and the collected image LF is performed with the layout of the information display image D changed. By performing the operation of changing the layout, the reference image LR and the collected image LF to be compared become adjacent to each other. Therefore, when the user alternates between looking at the reference image LR and the collected image LF to be compared, the contents of the image information K can be prevented from interfering with the comparison. Therefore, the fatigue experienced by the user when comparing the reference image LR and the collected image LF can be reduced.

[0117] Furthermore, in the second embodiment, the layout of the information display image D is changed in advance in step F0 before X-ray imaging begins, so that the reference image LR and the acquired image LF are already displayed adjacent to each other when they are displayed on the image display unit 49. This eliminates the need to change the layout while the procedure is in progress, further reducing the time required for the procedure. The user completes the operation of the catheter Ch using each of the information display images D with the changed layout, thereby completing a series of steps related to angiography using the X-ray fluoroscopy apparatus 1.

[0118] <Effects of the configuration of the embodiment> (Item 1) The X-ray fluoroscopy apparatus according to this embodiment includes an X-ray tube that irradiates a subject with X-rays, an X-ray detector that detects 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 around a predetermined axis, an X-ray image generation 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, and the X-ray image display device has an X-ray image display area in which the X-ray image showing a predetermined region of interest is displayed and an image information display area in which information about the X-ray image is displayed. an information display area change instruction unit that inputs an instruction to change the position of the image information display area in the information display image so that at least two of the X-ray image display areas are displayed adjacent to each other for the information display image displayed in parallel on the image display unit; and an image display control unit that controls the image display unit to change the position of the image information display area in the information display image so that the X-ray image display areas are displayed adjacent to each other based on the content of the instruction input to the information display area change instruction unit.

[0119] The effects of the X-ray fluoroscopy apparatus described in paragraph 1 will be described with reference to Figs. 18 to 21. In a conventional X-ray fluoroscopy apparatus, in an information display image E in which image information V is added to an X-ray image N, the positional relationship between the X-ray image N and the image information V is constant. Therefore, as an example, in a configuration in which the X-ray image N is always positioned to the right of the image information V in the information display image E, when two information display images E are arranged side by side, the image information V interferes with the operation of comparing the X-ray images N. That is, as shown in Fig. 18, when visually comparing an X-ray image N1 (an acquired image, for example) included in information display image E1 and an X-ray image N2 (a reference image, for example) included in information display image E2, the image information V2 included in information display image E2 interferes.

[0120] 18, there is a comparative example in which the positional relationship between the X-ray image N and the image information V in the information display image E is made different when the X-ray image N is the acquired image NF and when it is the reference image NR. In this comparative example, as shown in Fig. 19(a), when the X-ray image N is the acquired image NF, the X-ray image N is always arranged to the left of the image information V in the information display image E. When the X-ray image N is the reference image NR, the X-ray image N is always arranged to the right of the image information V in the information display image E, as shown in Fig. 19(b).

[0121] In this comparative example, as shown in Fig. 20, when an information display image E (information display image EF) including a collected image NF is arranged adjacent to the left side of an information display image E (information display image ER) including a reference image NR, the problem shown in Fig. 18 can be avoided. In other words, when the information display image EF is arranged to the left of the information display image ER, the collected image NF and the reference image NR are adjacent to each other on the left and right, so that it is possible to avoid the image information V interfering with the operation of comparing the collected image NF and the reference image NR.

[0122] However, in such a comparative example, it is difficult to reliably avoid the problem shown in Fig. 18. That is, when visually comparing a collected image NF and a reference image NR, the preferred arrangement pattern of the collected image NF and the reference image NR varies depending on the user. That is, some users prefer to arrange the collected image NF to the left of the reference image NR and compare them visually, while other users prefer to arrange the collected image NF above the reference image NR and compare them visually.

[0123] 19(a) and 19(b), the problem of the image information V interfering with comparison can be avoided only when the information display image EF is placed to the left of the information display image ER. That is, when the information display image EF is placed to the right of the information display image ER as shown in FIG. 21, two pieces of image information V exist between the collected image NF and the reference image NR, making it even more difficult to compare the collected image NF and the reference image NR.

[0124] In this comparative example, a new problem occurs when the information display image EF and the information display image ER are arranged one above the other. That is, when the information display image EF is arranged above the information display image ER as shown in Fig. 22, the positions of the information display image EF and the information display image ER are aligned in the left-right direction G. However, in the information display image EF, the image information V is arranged to the left of the acquired image NF, while in the information display image ER, the image information V is arranged to the right of the reference image NR.

[0125] As a result, a difference occurs in the horizontal direction G between the positions of the acquired image NF and the reference image NR, so the user must constantly move their gaze diagonally when comparing the acquired image NF and the reference image NR. For example, when comparing the center portion Fo of the information display image EF with the center portion Ro of the information display image ER, the user must constantly move their gaze back and forth diagonally along the trajectory indicated by the arrows YG in FIG. 21 and compare the contents of each image while mentally correcting the positional misalignment CP between the acquired image NF and the reference image NR in the horizontal direction G. There is a concern that the task of comparing the acquired image NF and the reference image NR, which are misaligned diagonally as shown in FIG. 20, may impose a greater burden on the user than the task of comparing the acquired image NF and the reference image NR, which are misaligned only horizontally or vertically.

[0126] In contrast to such a conventional configuration, the X-ray fluoroscopic imaging device 1 described in paragraph 1 is provided with an image display device 11 that displays an X-ray image L that shows a predetermined region of interest, and the image display device 11 is provided with 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, an information display image D having the X-ray image L and image information K is displayed side by side in a matrix.

[0127] The input unit 51 is configured to be able to input an instruction to change 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 in accordance with the instruction input to the input unit 51 so that the X-ray images L are displayed adjacent to each other.

[0128] That is, unlike conventional devices in which the positional relationship between the X-ray image L and the image information K in the information display image D is fixed, the X-ray fluoroscopy device 1 described in paragraph 1 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 if the pattern in which multiple information display images D are arranged in a matrix on the image display unit 49 is changed as needed 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 D can be changed again so that the X-ray images L are adjacent to each other in the changed arrangement pattern of the information display image D. Therefore, when comparing X-ray images L in multiple information display images D, it is possible to reliably prevent image information K from being present between the X-ray images L to be compared while changing the arrangement pattern of the information display image D according to the user's request. That is, it is possible to prevent image information K from interfering with the operation of comparing X-ray images when comparing the X-ray images, thereby reducing the burden required for the operation of comparing the X-ray images.

[0129] (Item 2) The X-ray fluoroscopy apparatus according to this embodiment includes an X-ray tube that irradiates a subject with X-rays, an X-ray detector that detects 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 around a predetermined axis, an X-ray image generation 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, and the X-ray image display device has an X-ray image display area in which the X-ray image showing a predetermined region of interest is displayed and an image display area in which information about the X-ray image is displayed. The apparatus includes an image display unit capable of displaying information display images each having an image information display area in a matrix in parallel, an information display position setting unit that pre-sets the position of the image information display area in the information display image so that the X-ray image display areas are displayed adjacent to each other in accordance with the positional relationship pattern in which the information display images are displayed in parallel, and an image display control unit that controls the image display unit by determining the positional relationship pattern in which the information display images are displayed in parallel 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.

[0130] The X-ray fluoroscopic imaging device described in paragraph 2 is provided with an image display device 11 that displays an X-ray image L that shows a predetermined region of interest, 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, an information display image D having the X-ray image L and image information K is displayed side by side in a matrix.

[0131] The layout setting unit 55 sets in advance 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, according to the positional relationship pattern in which the information display image D is displayed side by side. 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.

[0132] In this way, with the X-ray fluoroscopy apparatus described in paragraph 2, the position of the image information K in the information display image D can be set in advance before generating the X-ray image L. In other words, the X-ray images L can be displayed adjacent to each other without the need to change the position of the image information K while the surgical procedure is in progress, which reduces the burden of comparing the X-ray images and further shortens the steps and time required for the surgical procedure.

[0133] (Item 3) In the X-ray fluoroscopy apparatus described in items 1 or 2, the image display unit displays the information display image including the reference image, which is the X-ray image in which blood vessels are contrasted in a specified area of ​​interest, side by side with the information display image including the acquired image, which is the X-ray image most recently generated in which blood vessels are not contrasted in the area of ​​interest, and the image display control unit controls the image display unit to display the reference image and the acquired image adjacent to each other.

[0134] According to the X-ray fluoroscopic imaging device described in paragraph 3, the image display unit 49 displays an information display image DR and an information display image DF side by side. The information display image DR includes a reference image LR, and the information display image DF includes an acquired image LF. The reference image LR is an X-ray image L in which blood vessels in a predetermined region of interest are contrasted. The acquired image LF is an X-ray image L most recently generated in which blood vessels in the predetermined region of interest are not contrasted.

[0135] The image display control unit 57 then controls the image display unit 49 so that the reference image LR and the acquired image LF are displayed adjacent to each other. That is, the image display control unit 57 changes 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. This allows the user to accurately proceed with the surgical procedure for the nearest region of interest shown in the acquired image while visually checking the reference image showing the angiographically ...

[0136] <Other embodiments> It should be noted that the embodiments disclosed herein are illustrative in all respects and are not limiting. The scope of the present invention includes the claims and all modifications within the meaning and scope of the claims. For example, the present invention can be modified as follows:

[0137] (1) In each of the above-described embodiments, the images arranged in a matrix on the image display unit 49 are not limited to the acquired images LF and the reference images LR. As an example, ultrasound images may be arranged in parallel with the acquired images or reference images in a matrix. In this case, the user proceeds with the surgical procedure while visually comparing the acquired images, the reference images, and the ultrasound images.

[0138] (2) In the above-described embodiment and modified example, as an arrangement pattern for displaying a plurality of information display images D in parallel on the image display unit 49, a pattern in which two information display images D are displayed in parallel in the left-right direction G and two information display images D are displayed in parallel in the up-down direction H has been exemplified, but the arrangement is not limited to such a 2×2 array pattern. Three or more information display images D may be arranged in the left-right direction G, or three or more information display images D may be arranged in the up-down direction H.

[0139] (3) In the above-described embodiment or modified example, the image information K and the X-ray image L are not limited to being arranged adjacent to each other in the left-right direction G. In other words, although the position where the image information K is arranged in the information display image D is described as being on the left or right side of the X-ray image L as an example, the position is not limited to this. That is, the X-ray image L and the image information K may be arranged adjacent to each other in the up-down direction H in the information display image D.

[0140] 22 shows a configuration in which, in each information display image D in the initial state, the X-ray image L is positioned below the image information K. FIG. 22 also illustrates an arrangement pattern for displaying a plurality of information display images D, in which three rows of information display images D are arranged in the left-right direction G and two rows of information display images D are arranged in the up-down direction. In the initial state shown in FIG. 22, as an example, in the three information display images D arranged in the upper row of the six information display images D, the X-ray images L are adjacent to each other in the left-right direction G. Therefore, the image information K does not interfere with the operation of comparing the three X-ray images arranged side by side in the left-right direction G.

[0141] 22, however, the image information K becomes an obstacle when 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 side by side in the vertical direction, when comparing the two X-ray images L, the image information K becomes an obstacle when comparing the two X-ray images L.

[0142] 22 , an operation to change the layout of the information display images D is performed on the three information display images D arranged in the lower rows among the six information display images D, similar to step S4 according to the first embodiment or step F0 according to the second embodiment. That is, the user operates the input unit 51 or the like to input an instruction to change the positional relationship between the X-ray image L and the image information K for each of the three information display images D. Specifically, an instruction to move the image information K arranged above the X-ray image L downward and change the layout of the information display images D so that the image information K is arranged below the X-ray image L is input.

[0143] The layout setting unit 55 accepts the input instructions and maintains the layout settings for the three information display images D arranged in the upper row of the six information display images D in the initial state, while changing the layout settings for the three information display images D arranged in the lower row so that the X-ray image L is arranged above the image information K.

[0144] The image display control unit 57 controls the image display unit 49 so that each of the information display images D is displayed in accordance with the layout setting changed by the layout setting unit 55. As a result, as shown in Fig. 23, for the three information display images D arranged in the upper row, the X-ray image L is arranged below the image information K, while for the three information display images D arranged in the lower row, the X-ray image L is arranged above the image information K.

[0145] 23, the X-ray images L are arranged adjacent to each other in the vertical direction H. Therefore, not only can the user avoid being hindered by the image information K in comparing the multiple X-ray images L arranged adjacent to each other in the horizontal direction G, but also the user can avoid being hindered by the image information K in comparing the multiple X-ray images L arranged adjacent to each other in the vertical direction H. [Explanation of symbols]

[0146] 1. X-ray fluoroscopy equipment 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...Slide mechanism 21... Rotating mechanism 23...post 25…Support base 27...X-ray tube 29...X-ray detector 31...C-arm 33...Slide mechanism 35...Rotation mechanism 39...X-ray irradiation control unit 41 ... Drive control unit 43...Image generation unit 45...Storage section 47...Operation console 49...Image display section 51...input section 53...Layout memory section 55...Layout setting section 57...Image display control unit D...Information display image L...X-ray image K...Image information LF...Collected images LR...Reference image

Claims

1. an X-ray tube that irradiates an object with X-rays; an X-ray detector that detects X-rays that have passed through the subject; an arm that supports the X-ray tube and the X-ray detector so as to 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; an X-ray image display device that displays the X-ray image; Equipped with The X-ray image display device comprises: an image display unit capable of displaying information display images in parallel in a matrix, the information display image having an X-ray image display area in which the X-ray image showing a predetermined region of interest is displayed and an image information display area in which information about the X-ray image is displayed; an information display area change instruction unit that inputs an instruction to change the positions of the image information display areas in the information display image displayed in parallel on the image display unit so that at least two of the X-ray image display areas are displayed adjacent to each other; an image display control unit that controls the image display unit to change the positions of the image information display areas in the information display image based on the content of an instruction input to the information display area change instruction unit so that the X-ray image display areas are displayed adjacent to each other; An X-ray fluoroscopy apparatus comprising:

2. an X-ray tube that irradiates an object with X-rays; an X-ray detector that detects X-rays that have passed through the subject; an arm that supports the X-ray tube and the X-ray detector so as to 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; an X-ray image display device that displays the X-ray image; Equipped with The X-ray image display device comprises: an image display unit capable of displaying information display images in parallel in a matrix, the information display image having an X-ray image display area in which the X-ray image showing a predetermined region of interest is displayed and an image information display area in which information about the X-ray image is displayed; an information display position setting unit that sets in advance positions of the image information display areas in the information display image so that the X-ray image display areas are displayed adjacent to each other in accordance with a positional relationship pattern in which the information display images are displayed side by side; an image display control unit that controls the image display unit by determining a pattern of a positional relationship in which the information display images are displayed in parallel, so that the position of the image information display area in the information display image is set to the position set by the information display position setting unit; An X-ray fluoroscopy apparatus comprising:

3. 2. The X-ray fluoroscopic imaging apparatus according to claim 1, The image display unit displaying, in parallel, the information display image including the reference image, which is the X-ray image in which blood vessels are contrasted in a predetermined region of interest, and the information display image including the acquired image, which is the X-ray image most recently generated in which blood vessels are not contrasted in the region of interest; The image display control unit An X-ray fluoroscopic imaging apparatus that controls the image display unit so as to display the reference image and the acquired image adjacent to each other.

Images