High-precision CT scanning device

Abstract

This invention discloses a high-precision CT scanning device, comprising: a CT scanning gantry, a CT bed, and a positioning and adjustment mechanism disposed between the CT scanning gantry and the CT bed. The CT scanning gantry includes a scanning aperture, and the top surface of the CT bed is parallel to the axis of the scanning aperture. The positioning and adjustment mechanism is used to adjust the horizontal orientation of the CT bed. The high-precision CT scanning device provided in this application has a positioning and adjustment mechanism between the CT bed and the CT scanning gantry. If the movement direction of the CT bed is at a non-zero angle with the axis of the scanning aperture, the positioning and adjustment mechanism adjusts the horizontal orientation of the CT bed to adjust its movement direction, thereby aligning the movement direction of the CT bed with the axis of the scanning aperture, thus improving the scanning accuracy of the CT bed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a high-precision CT scanning device. Background Technology

[0002] The CT gantry and CT scanning bed constitute the CT mechanical system, with the CT scanning bed used for patient support and positioning. During a CT scan, the CT scanning bed supports the patient and moves along the Z-axis of the CT gantry, guiding the patient into the aperture. After the scan, the patient is moved out of the aperture. Because CT scans are helical, the CT gantry rotates while the CT scanning bed enters the aperture. In precise radiotherapy, the Z-axis movement of the CT scanning bed is critical; if the movement of the CT scanning bed forms an angle with the CT gantry, it will significantly affect the accuracy of lesion localization. Therefore, precise adjustment of the CT scanning bed's Z-axis has always been a challenge. Currently, diagnostic CT requires a center deviation of approximately 2mm, which is relatively low accuracy; for radiotherapy CT, the center deviation requirement is within 1mm. Existing technologies and solutions are difficult to adjust and implement.

[0003] In conclusion, how to solve the problem of low accuracy in existing CT scans is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a high-precision CT scanning device that solves the problem of low CT scanning accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-precision CT scanning device includes: a CT scanning gantry, a CT bed, and a positioning and adjustment mechanism disposed between the CT scanning gantry and the CT bed. The CT scanning gantry includes a scanning hole, the top surface of the CT bed is parallel to the axis of the scanning hole, and the positioning and adjustment mechanism is used to drive the CT bed to a horizontal orientation.

[0007] Preferably, the positioning and adjustment mechanism includes a positioning device and an adjustment device. One end of the positioning device is connected to the CT scanning gantry, and the other end is hinged to the CT bed. The adjustment device is located on one side of the positioning device to push or pull the CT bed to rotate around the hinge point where the positioning device is hinged to the CT bed.

[0008] Preferably, the positioning device includes a positioning rod, a first positioning hole, and a second positioning hole. The first positioning hole is located on the end face of the CT scanner facing the CT bed, and the second positioning hole is located on the bottom of the CT bed. The axis of the first positioning hole is perpendicular to the axis of the second positioning hole. The center line of the first positioning hole and the axis of the scanning hole are in the same vertical plane. One end of the positioning rod is inserted into the first positioning hole, and the other end of the positioning rod is hinged to the second positioning hole.

[0009] Preferably, the CT bed includes a base and a bed board, and the second positioning hole is disposed on the base directly below the bed board. The axis of the second positioning hole is perpendicular to and coplanar with the center line of the bed board.

[0010] Preferably, the adjustment device includes a telescopic rod and a fixing block. The fixing block is disposed on the base on one side of the second positioning hole. One end of the telescopic rod is hinged to the fixing block, and the other end is connected to the CT scanning frame on the side of the first positioning hole.

[0011] Preferably, the first positioning hole is a circular hole or a square hole.

[0012] The high-precision CT scanning device provided in this application has a positioning adjustment mechanism between the CT bed and the CT scanning gantry. If the movement direction of the CT bed is at a non-zero angle with the axial direction of the scanning hole, the horizontal orientation of the CT bed is adjusted by positioning adjustment to adjust the movement direction of the CT bed, so that the movement direction of the CT bed is consistent with the axial direction of the scanning hole, thereby improving the scanning accuracy of the CT bed. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the high-precision CT scanning device provided by the present invention;

[0015] Figure 2 This is a front view of the positioning rod provided by the present invention;

[0016] Figure 3 A perspective view of the positioning rod provided by the present invention;

[0017] Figure 4 A three-dimensional view of the CT bed provided by the present invention;

[0018] Figure 5This is a perspective view of the CT scanner provided by the present invention.

[0019] Figure 1-5 middle:

[0020] 1-CT scanning gantry, 2-first positioning hole, 3-CT bed, 4-second positioning hole, 5-positioning device, 6-adjustment device, 7-positioning rod, 8-first positioning protrusion, 9-second positioning protrusion, 10-bed board, 11-base, 12-scanning hole. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The core of this invention is to provide a high-precision CT scanning device, which solves the problem of low CT scanning accuracy.

[0023] Please refer to Figures 1-5 A high-precision CT scanning device includes: a CT scanning frame 1, a CT bed 3, and a positioning and adjustment mechanism disposed between the CT scanning frame 1 and the CT bed 3. The CT scanning frame 1 includes a scanning hole 12, and the top surface of the CT bed 3 is parallel to the axis of the scanning hole 12. The positioning and adjustment mechanism is used to drive the CT bed 3 to a horizontal orientation.

[0024] It should be noted that the CT bed 3 is positioned facing the scanning hole 12 of the CT gantry 1. The CT bed 3 can enter and exit the scanning hole 12. The top surface of the CT bed 3 is parallel to the axis of the scanning hole 12, ensuring that the CT bed 3 is always horizontal when placed on the ground. The positioning and adjustment mechanism can not only position the relative position of the gantry and the CT bed 3, but also adjust the horizontal orientation of the CT bed 3.

[0025] The high-precision CT scanning device provided in this application has a positioning adjustment mechanism between the CT bed 3 and the CT scanning gantry 1. If the movement direction of the CT bed 3 is at a non-zero angle with the axial direction of the scanning hole 12, the horizontal orientation of the CT bed 3 is adjusted by positioning adjustment to adjust the movement direction of the CT bed 3, so that the movement direction of the CT bed 3 is consistent with the axial direction of the scanning hole 12, thereby improving the scanning accuracy of the CT bed 3.

[0026] Based on the above embodiments, as a further preferred embodiment, the positioning and adjustment mechanism includes a positioning device 56 and an adjustment device 6. One end of the positioning device 56 is connected to the CT scanner 1, and the other end is hinged to the CT bed 3. The adjustment device 6 is disposed on one side of the positioning device 56 to push or pull the CT bed 3 to rotate around the hinge point where the positioning device 56 is hinged to the CT bed 3. The positioning device 56 connects the CT scanner 1 and the CT bed 3 to position the relative position between the CT scanner 1 and the CT bed 3. The adjustment device 6 can adjust the horizontal orientation of the CT bed 3 along the hinge point where the positioning device 56 is hinged to the CT bed 3.

[0027] Based on the above embodiments, as a further preferred embodiment, the positioning device 56 includes a positioning rod 75, a first positioning hole 2 and a second positioning hole 4. The first positioning hole 2 is disposed on the end face of the CT scanning frame 1 facing the CT bed 3, and the second positioning hole 4 is disposed on the bottom of the CT bed 3. The axis of the first positioning hole 2 and the axis of the second positioning hole 4 are perpendicular to each other. The center line of the first positioning hole 2 and the axis of the scanning hole 12 are in the same vertical plane. One end of the positioning rod 75 is inserted into the first positioning hole 2, and the other end of the positioning rod 75 is hinged to the second positioning hole 4.

[0028] One end of the positioning rod 75 is provided with a first positioning protrusion 8 that matches the first positioning hole 2. The positioning rod 75 has a long strip structure. After the first positioning protrusion 8 is inserted into the first positioning hole 2, its position is fixed. The other end of the positioning rod 75 is provided with a downward-facing second positioning protrusion 9. The second positioning hole 4 is upward-facing. The second positioning protrusion 9 is inserted into the second positioning hole 4 and can rotate along the axis of the second positioning hole 4. The axis of the second positioning protrusion 9 coincides with the axis of the second positioning hole 4, so that the entire CT bed 3 can rotate around the axis of the second positioning hole 4. The centerline of the second positioning hole 4 and the centerline of the first positioning hole 2 are in the same vertical plane. The centerline of the first positioning hole 2 and the axis of the scanning hole 12 are in the same vertical plane, which greatly improves the accuracy of the CT bed 3 in adjusting its position.

[0029] Based on the above embodiments, as a further preferred embodiment, the CT bed 3 includes a base 11 and a bed board 10. The second positioning hole 4 is disposed on the base 11 directly below the bed board 10. The axis of the second positioning hole 4 is perpendicular to and coplanar with the center line of the bed board 10. The bed board 10 is square and has a symmetrical structure. The axis of the second positioning hole 4 is coplanar with the center line of the bed board 10, so that the center line of the bed board 10 is coplanar with the axis of the scanning hole 12, thereby improving the positioning accuracy of the CT bed 3. When the center line of the bed board 10 is not coplanar with the axis of the scanning hole 12, the center line of the bed board 10 can be adjusted to be coplanar with the axis of the scanning hole 12 by the adjustment device 6.

[0030] Based on the above embodiments, as a further preferred embodiment, the adjustment device 6 includes a telescopic rod and a fixing block. The fixing block is disposed on the base 11 on one side of the second positioning hole 4. One end of the telescopic rod is hinged to the fixing block, and the other end is connected to the CT scanner 1 on the side of the first positioning hole 2. Preferably, the telescopic rod is a hydraulic rod or an electric rod. By extending or shortening the telescopic rod, the CT bed 3 can be rotated around the axis of the second positioning hole 4 to adjust the orientation of the CT bed 3.

[0031] Based on the above embodiments, as a further preferred embodiment, the first positioning hole 2 is a circular hole or a square hole. Both circular and square holes have a center line. Optionally, the first positioning hole 2 can have a cross-section with other hole shapes that also have a center line.

[0032] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0033] The high-precision CT scanning device provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A high-precision CT scanning device, characterized in that, include: A CT scanner (1), a CT bed (3), and a positioning and adjustment mechanism disposed between the CT scanner (1) and the CT bed (3). The CT scanner (1) includes a scanning hole (12), and the top surface of the CT bed (3) is parallel to the axis of the scanning hole (12). The positioning and adjustment mechanism is used to drive the horizontal orientation of the CT bed (3). The positioning and adjustment mechanism includes a positioning device (5) and an adjustment device (6). One end of the positioning device (5) is connected to the CT scanner (1), and the other end is connected to the CT bed (3). The CT bed (3) is hinged, and the adjustment device (6) is located on one side of the positioning device (5) to push or pull the CT bed (3) to rotate around the hinge point where the positioning device (5) is hinged to the CT bed (3); the positioning device (5) includes a positioning rod (7), a first positioning hole (2) and a second positioning hole (4). The first positioning hole (2) is located on the end face of the CT scanner (1) facing the CT bed (3), and the second positioning hole (4) is located on the bottom of the CT bed (3). The axis of the first positioning hole (2) is perpendicular to the axis of the second positioning hole (4). The axes of the positioning holes (4) are perpendicular to each other. The center line of the first positioning hole (2) and the axis of the scanning hole (12) are in the same vertical plane. One end of the positioning rod (7) is inserted into the first positioning hole (2), and the other end of the positioning rod (7) is hinged to the second positioning hole (4). The CT bed (3) includes a base (11) and a bed board (10). The second positioning hole (4) is located on the base (11) directly below the bed board (10). The axis of the second positioning hole (4) is perpendicular to the center line of the bed board (10). And coplanar; the adjustment device (6) includes a telescopic rod and a fixing block. The fixing block is set on the base (11) on one side of the second positioning hole (4). One end of the telescopic rod is hinged to the fixing block and the other end is connected to the CT scanning frame (1) on the side of the first positioning hole (2). By extending or shortening the telescopic rod, the CT bed (3) is driven to rotate around the axis of the second positioning hole (4) to adjust the orientation of the CT bed (3) so that the center line of the CT bed (3) and the axis of the scanning hole (12) are adjusted to be coplanar.

2. The high-precision CT scanning device according to claim 1, characterized in that, The first positioning hole (2) is a circular hole or a square hole.

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