Calibration tool for front collimator of mobile CT (Computed Tomography)

Abstract

The utility model discloses a calibration tool for a front collimator of a mobile CT (Computed Tomography), relates to the technical field of medical instruments, and can solve the problems that the position calibration of the existing front collimator depends on manual knocking, the calibration is difficult, the operation is tedious and the efficiency is low. The front collimator calibration tool of the mobile CT comprises a tool body used for calibrating the position of a collimator body in the horizontal direction, and the tool body comprises a bottom plate and a position calibration surrounding edge structure which is arranged on the bottom plate and used for calibrating the position of the collimator body. The bottom plate is provided with at least one fixing through hole and at least one adjusting through hole, and the size of the adjusting through hole is larger than that of the fixing through hole. The tool further comprises at least one fastening bolt which is installed on the fixing through hole and used for temporarily fixing the generator body and the tool body, and at least one connecting bolt which is located in the adjusting through hole and used for connecting the collimator body and the generator body.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a front collimator calibration tool for a mobile CT. Background Art

[0002] Wheeled mobile CT (MCT), also known as intraoperative CT or bedside CT, is a mobile X-ray computed tomography device that can be placed at the patient's bedside or loaded into an ambulance. It is flexible and lightweight, can be moved by one person, and has a compact structure and high system integration.

[0003] The MCT can be broken down into four functional systems: the imaging system, the mechanical structure system, the control system, and the application software system. The imaging system is the core of the MCT. The imaging system primarily consists of an X-ray generation module (including the X-ray source / tube, high-voltage generator, and filter) and a detector system (including the detector, data acquisition module, and collimator).

[0004] During the MCT production process, the front collimator needs to be calibrated and adjusted to spatially position the image and ensure the quality of the CT image output. However, during the current operation, there is no auxiliary device for adjusting the front collimator. During the calibration and adjustment of the front collimator, the image is first exposed, then tapped with a tool based on the image position, and then exposed and judged. The above process is repeated until the calibration is in place. However, the current calibration accuracy of the collimator position is relatively high. The manual tapping method uses tools, and the tapping force and angle are entirely based on experience. The problem of excessive deviation is extremely easy to occur. The entire calibration process requires repeated tapping and calibration, and then exposure and image verification. As a result, the entire front collimator calibration and adjustment process is not only cumbersome to operate, but also extremely inefficient.

[0005] Based on this, the inventors have designed a front collimator calibration tool for a mobile CT to solve one or more of the above problems, and thus proposed the present utility model. Summary of the Invention

[0006] The utility model aims to provide a front collimator calibration tool for a mobile CT, which solves the problem that the position calibration of the front collimator relies on manual knocking, the calibration is difficult, the operation is cumbersome and the efficiency is low.

[0007] In order to solve the above technical problems, the present invention adopts the following solutions:

[0008] The utility model provides a front collimator calibration tool for a mobile CT, comprising a tool body for calibrating the position of the collimator body in the horizontal direction, the tool body comprising a base plate, and a calibration surrounding structure provided on the base plate and used for calibrating the position of the collimator body;

[0009] At least one fixed through-hole and at least one adjustment through-hole on the bottom plate, and the size of the adjustment through-hole is larger than that of the fixed through-hole;

[0010] It also includes fastening bolts installed on at least one fixed through-hole and used for temporarily fixing the generator main body and the tooling main body, and connection bolts located in at least one adjustment through-hole and used for connecting the collimator main body and the generator main body.

[0011] Optionally, the shape of the bottom plate is rectangular;

[0012] At least one set of first adjustment screw hole groups for adjusting the lateral position of the collimator main body and at least one set of second adjustment screw hole groups for adjusting the longitudinal position of the collimator main body are provided on the alignment surrounding edge structure.

[0013] Optionally, the alignment surrounding edge structure includes at least two transverse stop edges respectively arranged on the front and rear sides of the bottom plate, and at least two longitudinal stop edges respectively arranged on the left and right sides of the bottom plate;

[0014] One set of the first adjustment screw hole groups includes two transverse adjustment screw holes with coincident axes and respectively located on two transverse stop edges;

[0015] One set of the second adjustment screw hole groups includes two longitudinal adjustment screw holes with coincident axes and respectively located on two longitudinal stop edges;

[0016] The distance between the two transverse stop edges on the front and rear sides of the bottom plate is greater than the width of the collimator main body;

[0017] The distance between the two longitudinal stop edges on the left and right sides of the bottom plate is greater than the length of the collimator main body.

[0018] Optionally, there are four transverse stop edges and two longitudinal stop edges;

[0019] The four transverse stop edges are arranged close to the four corners of the bottom plate, and both ends of the two longitudinal stop edges are connected to the transverse stop edges located on the front and rear sides of the bottom plate to form a U-shaped enclosure structure, and the U-shaped enclosure structures corresponding to the two longitudinal stop edges are arranged oppositely.

[0020] Optionally, the alignment surrounding edge structure further includes alignment bolts threadedly connected to the first adjustment screw hole groups and the second adjustment screw hole groups.

[0021] Optionally, both the first adjustment screw hole groups and the second adjustment screw hole groups are provided with two groups, and both the first adjustment screw hole groups and the second adjustment screw hole groups are arranged close to the corner positions of the bottom plate.

[0022] Optionally, there are two fixed through-holes and two adjustment through-holes;

[0023] The axes of the two fixed through holes and the two adjusting through holes are connected to form a rectangle, and the two fixed through holes and the two adjusting through holes are all located at the diagonal positions of the rectangle.

[0024] Optionally, the number of the fastening bolts and the number of the fixing through holes are the same;

[0025] The number of the connecting bolts is the same as the number of the adjusting through holes.

[0026] Optionally, a rectangular through hole corresponding to the collimation groove of the collimator body is further provided in the middle of the base plate.

[0027] Optionally, the length of the rectangular through hole is greater than or equal to the length of the collimating groove, and the width of the rectangular through hole is greater than or equal to the width of the collimating groove.

[0028] Beneficial effects of the utility model:

[0029] The utility model sets a tooling body, and the tooling body includes a base plate and a calibration edge structure, and a fixing through hole and an adjustment through hole are set on the base plate, and a fastening bolt is spirally connected to the fixing through hole, and a connecting bolt is set in the adjusting through hole, so that after the tooling body is connected to the generator body through the connecting bolt, the calibration edge structure can be used to calibrate the horizontal position of the collimator body. After the calibration is in place, the connecting bolt can be used to lock the collimator body and the generator body, so that the positions of the collimator body and the generator body are relatively fixed, and then the tooling body and the fastening bolt are removed, and new connecting bolts are installed to further lock the collimator body and the generator body, so as to realize the position calibration of the collimator body. Compared with the prior art, the utility model uses auxiliary tooling for calibration, which solves the problem that the current position calibration of the front collimator relies on manual knocking, the calibration is difficult, the operation is cumbersome, and the efficiency is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0031] Figure 2 It is a schematic cross-sectional view of an embodiment of the present utility model.

[0032] Figure 3 This is a schematic diagram of the structure of an embodiment of the utility model during use.

[0033] Figure 4 It is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model.

[0034] Description of reference numerals:

[0035] 1- tooling body, 11- base plate, 111- rectangular through hole, 112- fixed through hole, 113- adjustment through hole, 12- calibration edge structure, 121- transverse rib, 122- longitudinal rib, 123- transverse adjustment screw hole, 124- longitudinal adjustment screw hole, 13- calibration bolt, 14- fastening bolt, 15- connecting bolt, 2- collimator body, 3- generator body, 4- ray generating module. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] like Figures 1 to 3 As shown, this embodiment provides a front collimator calibration tool for a mobile CT, including a tool body 1 for calibrating the position of a collimator body 2 in the horizontal direction. The tool body 1 includes a base plate 11 and a calibration surrounding structure 12 provided on the base plate 11 and used for calibrating the position of the collimator body 2.

[0041] The bottom plate 11 has at least one fixing through hole 112 and at least one adjusting through hole 113, and the size of the adjusting through hole 113 is larger than that of the fixing through hole 112;

[0042] It also includes a fastening bolt 14 installed on at least one fixing through hole 112 and used to temporarily fix the generator body 3 and the tooling body 1, and at least one connecting bolt 15 located in the adjustment through hole 113 and used to connect the collimator body 2 and the generator body 3.

[0043] In this embodiment, a tool body 1 is provided, and the tool body 1 includes a base plate 11 and a calibration edge structure 12. A fixing through hole 112 and an adjustment through hole 113 are provided on the base plate 11, and a fastening bolt 14 is screwed on the fixing through hole 112, and a connecting bolt 15 is provided in the adjustment through hole 113. After the tool body 1 is connected to the generator body 3 through the connecting bolt 15, the calibration edge structure 12 can be used to calibrate the horizontal position of the collimator body 2. After the calibration is in place, the connecting bolt 14 can be used to adjust the position of the collimator body 2. The bolt 15 locks the collimator body 2 and the generator body 3, so that the positions of the collimator body 2 and the generator body 3 are relatively fixed. Then the tooling body 1 and the fastening bolts 14 are removed, and new connecting bolts 15 are installed to further lock the collimator body 2 and the generator body 3 to achieve position calibration of the collimator body 2. Compared with the prior art, the present invention uses auxiliary tooling for calibration, which solves the problem that the current position calibration of the front collimator relies on manual knocking, which is difficult to calibrate, cumbersome to operate, and inefficient.

[0044] In this embodiment, when the fastening bolt 14 connects the tooling body 1 and the generator body 3, it needs to be set through the collimator body 2. A waist-shaped hole is provided on the collimator body 2, and the size is larger than the fastening bolt 14, so that after the tooling body 1 and the generator body 3 are connected, when the tooling body 1 is horizontally calibrated by the calibration surrounding structure 12, the tooling body 1 can have a small relative displacement with the tooling body 1, and at the same time does not affect the subsequent fixation between the tooling body 1 and the generator body 3.

[0045] Specifically, in this embodiment, Figure 1 and Figure 2 As shown, the bottom plate 11 is in the shape of a rectangle;

[0046] The alignment edge structure 12 is provided with at least one first adjustment screw hole group for adjusting the lateral position of the collimator body 2, and at least one second adjustment screw hole group for adjusting the longitudinal position of the collimator body 2. The lateral position and longitudinal position of the collimator body 2 can be adjusted through the first adjustment screw hole group and the second adjustment screw hole group.

[0047] Specifically, in this embodiment, the alignment edge structure 12 includes at least two transverse ribs 121 respectively provided on the front and rear sides of the bottom plate 11, and at least two longitudinal ribs 122 respectively provided on the left and right sides of the bottom plate 11.

[0048] The first adjusting screw hole group includes two transverse adjusting screw holes 123 whose axes coincide with each other and are respectively located on two transverse ribs 121;

[0049] One set of the second adjusting screw holes includes two longitudinal adjusting screw holes 124 whose axes coincide with each other and are respectively located on the two longitudinal ribs 122;

[0050] The distance between the two transverse ribs 121 on the front and rear sides of the base plate 11 is greater than the width of the collimator body 2;

[0051] The distance between the two longitudinal ribs 122 on the left and right sides of the bottom plate 11 is greater than the length of the collimator body 2 .

[0052] In this embodiment, by setting two lateral adjustment screw holes 123, the collimator body 2 can be pushed to move freely in the lateral direction to achieve lateral position adjustment. By setting two longitudinal adjustment screw holes 124, the collimator body 2 can be pushed to move freely in the longitudinal direction to achieve longitudinal position adjustment.

[0053] Specifically, in this embodiment, Figure 1 and Figure 2 ,as well as Figure 4 As shown, the transverse ribs 121 are provided with four pieces, and the longitudinal ribs 122 are provided with two pieces;

[0054] Four transverse flanges 121 are positioned adjacent to the four corners of the base plate 11. The two longitudinal flanges 122 are connected at both ends to the transverse flanges 121 located on the front and rear sides of the base plate 11 to form a ⌚-shaped enclosure structure. The ⌚-shaped enclosure structures corresponding to the two longitudinal flanges 122 are positioned opposite each other. The provision of four transverse flanges 121 allows for the provision of two sets of first adjustment screw holes on each of the four transverse flanges 121, reducing the possibility of deflection of the collimator body 2 during adjustment.

[0055] Specifically, in this embodiment, the alignment edge structure 12 further includes alignment bolts 13 threadedly connected to the first adjustment screw hole group and the second adjustment screw hole group. In this embodiment, rotating the alignment bolts 13 can push the collimator body 2 to move in the horizontal direction.

[0056] Specifically, in this embodiment, Figure 2 As shown, two groups of first and second adjusting screw holes are provided, and both the first and second adjusting screw holes are provided near the corners of the base plate 11. Providing two groups of first and second adjusting screw holes can prevent the collimator body 2 from deflecting when in the calibration position, thereby improving calibration efficiency.

[0057] Specifically, in this embodiment, Figure 1 、 Figure 2 and Figure 4As shown, there are two fixing through holes 112 and two adjusting through holes 113;

[0058] The axes of the two fixing holes 112 and the two adjusting holes 113 are connected to form a rectangle, and the two fixing holes 112 and the two adjusting holes 113 are located at the diagonals of the rectangle. The provision of two fixing holes 112 and two adjusting holes 113 makes the connection between the collimator body 2 and the generator body 3, as well as the connection between the tooling body 1 and the generator body 3, more stable.

[0059] Specifically, in this embodiment, the number of the fastening bolts 14 and the fixing through holes 112 are the same;

[0060] The number of the connecting bolts 15 is the same as the number of the adjusting through holes 113 .

[0061] Specifically, in this embodiment, Figure 1 As shown, a rectangular through hole 111 corresponding to the collimation groove of the collimator body 2 is further provided in the middle of the base plate 11 .

[0062] Specifically, in this embodiment, Figure 1 As shown, the length of the rectangular through hole 111 is greater than or equal to the length of the collimating groove, and the width of the rectangular through hole 111 is greater than or equal to the width of the collimating groove. By providing the rectangular through hole 111, the filtering performance of the collimator body 2 can be avoided from being affected.

[0063] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will be able to make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A front collimator calibration tool for mobile CT, characterized in that: It includes a tooling body (1) for calibrating the position of the collimator body (2) in the horizontal direction. The tooling body (1) includes a bottom plate (11), and a positioning border structure (12) disposed on the bottom plate (11) and used for positioning the collimator body (2). There are at least one fixed through-hole (112) and at least one adjusting through-hole (113) on the bottom plate (11), and the size of the adjusting through-hole (113) is larger than that of the fixed through-hole (112). It further includes fastening bolts (14) installed on at least one fixed through-hole (112) and used for temporarily fixing the generator body (3) and the tooling body (1), and at least one connecting bolt (15) located in the adjusting through-hole (113) and used for connecting the collimator body (2) and the generator body (3).

2. A front collimator calibration tooling for a mobile CT according to claim 1, wherein The shape of the bottom plate (11) is rectangular; At least one set of first adjusting screw hole groups for adjusting the lateral position of the collimator body (2) and at least one set of second adjusting screw hole groups for adjusting the longitudinal position of the collimator body (2) are provided on the positioning border structure (12).

3. The front collimator calibration tool for mobile CT according to claim 2, characterized in that: The positioning border structure (12) includes at least two lateral stop edges (121) respectively disposed on the front and rear sides of the bottom plate (11), and at least two longitudinal stop edges (122) respectively disposed on the left and right sides of the bottom plate (11); One set of the first adjusting screw hole groups includes two lateral adjusting screw holes (123) with coincident axes and respectively located on two lateral stop edges (121); One set of the second adjusting screw hole groups includes two longitudinal adjusting screw holes (124) with coincident axes and respectively located on two longitudinal stop edges (122); The distance between the two lateral stop edges (121) on the front and rear sides of the bottom plate (11) is greater than the width of the collimator body (2); The distance between the two longitudinal stop edges (122) on the left and right sides of the bottom plate (11) is greater than the length of the collimator body (2).

4. The front collimator calibration tool for mobile CT according to claim 3, characterized in that: There are four lateral stop edges (121) and two longitudinal stop edges (122); The four lateral stop edges (121) are disposed close to the four corners of the bottom plate (11). Both ends of the two longitudinal stop edges (122) are connected to the lateral stop edges (121) located on the front and rear sides of the bottom plate (11) to form a U-shaped enclosure structure, and the U-shaped enclosure structures corresponding to the two longitudinal stop edges (122) are disposed oppositely.

5. The front collimator calibration tool for mobile CT according to claim 2, characterized in that: The positioning border structure (12) further includes positioning bolts (13) threadedly connected to the first adjusting screw hole groups and the second adjusting screw hole groups.

6. The front collimator calibration tool for mobile CT according to claim 2, characterized in that: Both the first adjusting screw hole groups and the second adjusting screw hole groups are provided with two sets, and both the first adjusting screw hole groups and the second adjusting screw hole groups are disposed close to the corner positions of the bottom plate (11).

7. The front collimator calibration tool for mobile CT according to claim 1, characterized in that: Both the fixed through-holes (112) and the adjusting through-holes (113) are provided with two; The axes of the two fixed through-holes (112) and the two adjusting through-holes (113) are connected to form a rectangle, and both the two fixed through-holes (112) and the two adjusting through-holes (113) are located at the diagonal positions of the rectangle.

8. The front collimator calibration tool for mobile CT according to claim 7, characterized in that: The number of the fastening bolts (14) is the same as that of the fixed through-holes (112); The number of the connecting bolts (15) is the same as the number of the adjusting through holes (113).

9. The front collimator calibration tool for mobile CT according to claim 1, characterized in that: A rectangular through hole (111) corresponding to the collimation groove of the collimator body (2) is also provided in the middle of the bottom plate (11).

10. The front collimator calibration tool for mobile CT according to claim 9, characterized in that: The length of the rectangular through hole (111) is greater than or equal to the length of the collimating groove, and the width of the rectangular through hole (111) is greater than or equal to the width of the collimating groove.

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