Medical Imaging Coordinate Calibration System and Calibration Method Based on Geodetic Coordinate System

Abstract

The present application provides a medical imaging coordinate correction system based on a geodetic coordinate system, comprising a fixed box, and a swingable coordinate system tube, which is connected to the fixed box and contains a contrast agent; the fixed box is also provided with a rotatable calibration plate, which is provided with a cross mark, and the coordinate system tube is connected to the calibration plate; a rotatable display board rack is also provided, which is used to fix a tissue model, and the display board rack is provided with an inclination sensor, which solves the problem of poor coordinate system correspondence and difficult quantitative feedback of the angle value of the physical model when the virtual imaging model is converted into a physical model.

Description

Technical Field

[0001] The present invention relates to the field of medical imaging coordinate system correction, and in particular to a medical imaging coordinate correction system and correction method based on a geodetic coordinate system. Background Art

[0002] When undergoing CT or MRI examinations in hospitals, doctors use 3D printing to convert virtual tissue models into physical models for easier observation. These models are used to observe important areas or intuitively determine the angle of surgical intervention.

[0003] Because patient positioning is random, while there are recommended positions based on experience for different conditions, these recommendations vary from person to person. Furthermore, scanned data, stored as machine data, is difficult to directly and intuitively convert into the required spatial data. This requires specialized imaging software or the cooperation of a radiologist. When applied to post-processing, such as 3D printing, relative spatial positions may be lost or difficult to visualize.

[0004] Because the intermediate process is cumbersome, it increases the time to judge the condition and also increases the difficulty for clinicians to get started.

[0005] Therefore, a device is needed to align the patient's position with the angle of the tissue model. This device can use CT or MRI as an intermediate link to connect the patient's position with the machine, record the tissue model angle, and then feed it back to the machine. Because the inclination of a 3D-printed tissue model in real space is relatively easy to measure, but it is difficult to directly align it with the coordinate system of the virtual model in CT or MRI, the CT or MRI must first be leveled relative to the ground, and then the measured inclination angle must be input into the machine to ensure that the virtual model and the physical tissue model are aligned.

[0006] However, it is impossible to check the calibration level every time CT or MRI is used. Substituting the CT or MRI angles into the C-arm machine undoubtedly increases the complexity of the intermediate process. Therefore, there is an urgent need for a CT coordinate correction system and correction method that can align the coordinate systems of the CT virtual model and the physical tissue model, and can easily quantify the angle values of the physical model to guide subsequent CT examinations. Summary of the Invention

[0007] The present invention provides a medical imaging coordinate correction system and correction method based on the geodetic coordinate system, which solves the problems of poor coordinate system correspondence and difficulty in quantifying and feeding back the angle values of the physical model when converting the imaging virtual model into the physical model.

[0008] To solve the above technical problems, the technical solution adopted by the present invention is: a coordinate correction system for medical imaging based on a geodetic coordinate system, comprising a fixed box and a swingable coordinate system tube connected to the fixed box, wherein a contrast agent is provided in the coordinate system tube;

[0009] The fixed box is also provided with a rotatable calibration plate, on which a cross mark is provided, and the coordinate system tube is connected to the calibration plate;

[0010] A rotatable display board frame is also provided, which is used to fix the tissue model and is provided with an inclination sensor.

[0011] In a preferred solution, a mask is further included, one side of the mask is used to connect to the human body, and the other side of the mask is detachably connected to the fixing box.

[0012] In the preferred solution, the fixed box is a box structure, the coordinate system tube is arranged in the fixed box, the calibration plate is arranged at the upper end of the fixed box, and a universal joint is also provided. The lower end of the universal joint is connected to the coordinate system tube, and the calibration plate is provided with a rotating central axis, which passes through the fixed box to be connected to the upper end of the universal joint.

[0013] In a preferred embodiment, the coordinate system tube includes a five-way tube sleeve, a first hollow tube, a second hollow tube and a third hollow tube. The five-way tube sleeve is provided with multiple openings, each opening is provided with a groove and a clamp, the first hollow tube, the second hollow tube and the third hollow tube are respectively connected to the openings of the five-way tube sleeve to form a three-axis orthogonal structure, and the first hollow tube, the second hollow tube and the third hollow tube are filled with contrast agent.

[0014] In the preferred embodiment, the universal joint includes an upper U-shaped block and a lower U-shaped block, a central connecting block is provided between the upper U-shaped block and the lower U-shaped block, the central connecting block is provided with multiple connecting shafts, each connecting shaft is rotatably connected to the central connecting block, each connecting shaft forms a cross structure, and each connecting shaft is respectively connected to the upper U-shaped block and the lower U-shaped block.

[0015] In the preferred embodiment, a tensioner is further provided in the center connecting block, a slidable sliding shaft is provided in the tensioner, a plurality of openings are provided in the circumferential direction of the side wall of the tensioner, and top beads are provided at the openings. The top beads are used to support the end face of the connecting shaft, and the sliding shaft is provided with a conical surface. The sliding shaft slides to tighten or loosen the conical surface to tighten or loosen the top bead.

[0016] In the preferred solution, a support frame device is also provided, and a rotating joint group is provided on one side of the display panel frame. One end of the rotating joint group is rotatably connected to the support frame device, and the rotating axis of the rotating joint group and the rotating axis axis of the rotating joint group and the support frame device are arranged perpendicularly.

[0017] Including correction methods,

[0018] Fix the fixed box with the coordinate system tube to the human body;

[0019] The coordinate system tube and the human body are scanned together by CT or MRI;

[0020] 3D printing is performed using data from CT or MRI scans, integrating the tissue model and coordinate system.

[0021] Place the tissue model on the display stand, adjust the angle of the display stand, find the area that needs to be observed, and record the angle value of the display stand at this time;

[0022] The angle value is fed back to the C-arm device, and the human body lies at that angle to scan the key area.

[0023] Including supplementary methods,

[0024] Producing a human body surface profiling mask;

[0025] During the first CT or MRI scan, the fixing box is connected to the mask, and the mask is fixed to the human body with an adhesive layer or straps;

[0026] After scanning, the mask is separated from the fixed box;

[0027] After the angle of the key observation area is determined and a C-arm scan is required, the mask and the fixing box are installed again, and the fixing box is fixed on the human body using the mask.

[0028] The preferred solution includes a mask making method:

[0029] The human body lies flat, and the light-shielding film is covered on the surface of the human body;

[0030] Inject UV glue into a transparent sealed bag, and lay the transparent sealed bag filled with UV glue flat on the light-shielding film;

[0031] Using ultraviolet light to irradiate the transparent sealed bag to solidify the ultraviolet glue;

[0032] Remove the solidified transparent sealing bag and grind the upper end surface to make a mask.

[0033] The beneficial effects of the present invention are: using gravity to define the vertical direction, directly connecting with the human body, and not being affected by the placement of CT or MRI equipment; it is easy to 3D print together with the human tissue model, and the physical model and the virtual model form a coordinate system corresponding, and a universal rotating display board frame is provided, which is convenient for confirming the optimal surgical angle and establishing an intuitive connection between the angle value and the machine positioning coordinate system, which can reduce the number of DSA and other angiography in subsequent treatments, the amount of contrast agent used, etc., reduce medical costs, and improve medical safety; it is simple to make, has clear display, and low cost, and exists in the form of images, so it is stable, not easy to modify, effective and sustainable, and prevents the loss of spatial positioning information of the image during software migration or subsequent other applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and examples.

[0035] Figure 1 It is a schematic diagram of the external placement of the coordinate system tube of the present invention.

[0036] Figure 2 It is a schematic diagram of the coordinate system tube of the present invention.

[0037] Figure 3 It is a schematic diagram of the calibration plate of the present invention.

[0038] Figure 4 It is a schematic diagram of a specific implementation of the fixing box of the present invention.

[0039] Figure 5 It is a top view of the fixing box of the present invention.

[0040] Figure 6 It is a partial schematic diagram of the fixing box of the present invention.

[0041] Figure 7 It is a diagram of the coordinate system tube structure of the present invention.

[0042] Figure 8 It is a structural diagram of the universal joint of the present invention.

[0043] Figure 9 It is a schematic diagram of the central connecting block of the present invention.

[0044] Figure 10 This is a cross-sectional view of the tensioner of the present invention Figure 1 .

[0045] Figure 11 This is a cross-sectional view of the tensioner of the present invention Figure 2 .

[0046] Figure 12 It is a side view of the display panel frame of the present invention.

[0047] Figure 13 It is an oblique view of an exhibition board of the present invention.

[0048] Figure 14 It is a schematic diagram of the display panel stand tripod of the present invention.

[0049] Figure 15 It is a partial view of the display panel stand tripod of the present invention.

[0050] Figure 16 It is a mask production diagram of the present invention.

[0051] Figure 17 This is a 3D model diagram of the sternum mask of the present invention.

[0052] In the figure: fixing box 1; oscillator 2; weight 201; hollow sleeve 202; ball joint seat 203; display panel frame 3; support column 301; rear fixing plate 302; tilt sensor 303; pitch rotation head 304; horizontal rotation sleeve 305; tripod 306; foot 307; adjustment rod 308; bushing 309; first locking knob 310; second locking knob 311; first top block 312; second top block 313; slide 314; rotation joint assembly 315; rotation axis 316; coordinate system tube 4; universal joint 401; five-way pipe sleeve 40 2; first hollow tube 403; second hollow tube 404; third hollow tube 405; notch 406; clamp 407; upper U-shaped block 408; lower U-shaped block 409; center connecting block 410; connecting shaft 411; tensioner 412; sliding shaft 413; top ball 414; electromagnet 415; conical surface 416; calibration plate 5; rotating central axis 501; cross mark 6; damping plate 502; mask 7; adhesive layer 701; light-shielding film 702; human body surface layer 703; transparent sealing bag 704; UV adhesive 705; one-way valve 706. DETAILED DESCRIPTION

[0053] Example 1:

[0054] like Figure 4-16 A coordinate correction system for medical imaging based on a geodetic coordinate system includes a fixed box 1 and a swingable coordinate system tube 4 connected to the fixed box 1. The coordinate system tube 4 contains a contrast agent.

[0055] The fixed box 1 is also provided with a rotatable calibration plate 5, on which a cross mark 6 is provided, and the coordinate system tube 4 is connected to the calibration plate 5;

[0056] A rotatable display panel frame 3 is also provided. The display panel frame 3 is used to fix the tissue model. An inclination sensor 303 is provided on the display panel frame 3 .

[0057] The coordinate system tube 4 is a hollow glass tube in the shape of a Cartesian coordinate system. In order to easily distinguish the X, Y, and Z axes after CT scanning, the lengths of the X, Y, and Z axes are made different. For example, the Z axis is made to have only a positive half axis or a negative half axis, and the X and Y axes have both positive and negative half axes but different lengths.

[0058] First, the fixing box 1 needs to be fixed to the human body with straps or glue. After the human body lies flat on the examination bed and the body position is stable, the coordinate system tube is stable and does not swing, and the Z axis of the coordinate system tube 4 points to the center of the earth, fixing the relative position and angle of the coordinate system tube 4.

[0059] During an imaging examination, since the human body has been injected with contrast agent in advance, the human body and the coordinate system tube 4 are both CT scanned into the model data in the same frame. The coordinate system of the human body can be observed very intuitively. When the model data is 3D printed into a solid model, the coordinate axis is also printed at the same time and connected to the solid tissue model. In other words, the coordinates represented by the coordinate system tube will never be lost due to intermediate links.

[0060] After the model is printed, it is placed on the display stand 3 for post-processing. The angle of the model is adjusted to an angle that is convenient for observing key areas or for performing interventional surgery. Due to the presence of the inclination sensor, the angle can be quantitatively recorded, and correction processing can be performed through the coordinate axis represented by the coordinate system tube.

[0061] Since the deviation between the CT or MRI coordinate system and the earth coordinate system is known from the first shot, this angle value is substituted into the C-arm device to guide the patient to lie at this angle for scanning of the key area.

[0062] In a preferred solution, a mask 7 is further included, one side of the mask 7 is used to connect to the human body, and the other side of the mask 7 is detachably connected to the fixing box 1.

[0063] In the preferred solution, the fixed box 1 is a box structure, the coordinate system tube 4 is arranged in the fixed box 1, the calibration plate 5 is arranged at the upper end of the fixed box 1, and a universal joint 401 is also provided. The lower end of the universal joint 401 is connected to the coordinate system tube 4, and the calibration plate 5 is provided with a rotating central axis 501. The rotating central axis 501 passes through the fixed box 1 to be connected to the upper end of the universal joint 401.

[0064] A damping plate 502 is provided on the lower side of the calibration plate 5 to appropriately increase the rotational friction of the calibration plate 5 to facilitate stabilizing the angle.

[0065] When the fixed box 1 is horizontal, the crosshairs 6 are parallel to the X and Y axes of the coordinate system tube 4. The central axis of the coordinate system tube 4 is aligned with the central axis of the calibration plate 5, and the two can rotate coaxially and synchronously. When the fixed box 1 is tilted, the Z axis of the coordinate system tube 4 always points to the center of gravity, and the coordinate system tube 4 represents the geodetic coordinate system.

[0066] The cross marks 6 can be expanded into chessboard lines.

[0067] CT and MRI devices incorporate integrated lasers that emit a cross-shaped positioning beam, representing the device's X and Y axes. Since the calibration plate 5 is rotatable, the cross-shaped lines 6 or one of the horizontal and vertical combinations of checkerboard lines can be adjusted to align with the cross-shaped positioning beam. This aligns the device coordinate system with the X and Y axes of the geodetic coordinate system. This means that the CT coordinate system and the geodetic coordinate system only have deflection angles around the X or Y axis, or both, and no horizontal deflection angle around the Z axis. The X and Y axes correspond to the head-foot line and left-right line of the CT or MRI machine, respectively, and are both perpendicular to the center of gravity, reducing the mathematical complexity involved in aligning the coordinate systems.

[0068] In a preferred embodiment, the coordinate system tube 4 includes a five-way tube sleeve 402, a first hollow tube 403, a second hollow tube 404 and a third hollow tube 405. The five-way tube sleeve 402 is provided with multiple openings, each opening is provided with a groove 406 and a clamp 407. The first hollow tube 403, the second hollow tube 404 and the third hollow tube 405 are respectively connected to the openings of the five-way tube sleeve 402 to form a three-axis orthogonal structure. The first hollow tube 403, the second hollow tube 404 and the third hollow tube 405 are filled with contrast agent.

[0069] There are two first hollow tubes 403 and two second hollow tubes 404 , and only one third hollow tube 405 , which are respectively inserted into corresponding openings and fixed by clamps 407 .

[0070] In the preferred embodiment, the universal joint 401 includes an upper U-shaped block 408 and a lower U-shaped block 409, and a central connecting block 410 is provided between the upper U-shaped block 408 and the lower U-shaped block 409. The central connecting block 410 is provided with multiple connecting shafts 411, and each connecting shaft 411 is rotatably connected to the central connecting block 410. Each connecting shaft 411 forms a cross structure, and each connecting shaft 411 is respectively connected to the upper U-shaped block 408 and the lower U-shaped block 409.

[0071] The connecting end of the connecting shaft 411 and the U-shaped block is fixed and does not rotate, while the end sleeved with the central connecting block 410 is rotatable.

[0072] In a preferred embodiment, a tensioner 412 is further provided in the center connecting block 410, and a slidable sliding shaft 413 is provided in the tensioner 412. The side wall of the tensioner 412 is provided with multiple openings along the circumference, and a top ball 414 is provided at the opening. The top ball 414 is used to support the end face of the connecting shaft 411. The sliding shaft 413 is provided with a tapered surface 416, and the sliding shaft 413 slides to tighten or loosen the tapered surface 416 to tighten or loosen the top ball 414.

[0073] An electromagnet 415 is also provided at the upper end of the tensioner 412, and the circuit passes through the upper end to the external control. An arc-shaped or conical positioning pit is set at the end of the connecting shaft 411 and coated with friction material to increase the friction force with the top ball 414. After the patient's posture is stable, the electromagnet 415 is energized to attract the sliding shaft 413, and the top ball 414 is squeezed out and pressed against the end of the connecting shaft 411, and the rotation direction of the connecting shaft 411 is locked.

[0074] Since MRI equipment prohibits the use of metal or magnetic objects, the electromagnet 415 solution is mainly aimed at CT scanning.

[0075] In the preferred embodiment, a support frame device is also provided, and a rotating joint group 315 is provided on one side of the display panel frame 3, one end of the rotating joint group 315 is rotatably connected to the support frame device, and the rotating axis of the rotating joint group 315 and the rotating joint group 315 are arranged perpendicular to the axis of the rotating axis of the support frame device.

[0076] The display panel frame 3 is used to fix the 3D printed tissue model. The other end of the rotating joint group 315 is connected to the display panel frame 3. A tilt sensor 303 is also provided, and the tilt sensor 303 is connected to the display panel frame 3.

[0077] Place the display board frame 3 at the initial angle and fix the printed tissue model on the panel of the display board frame 3 with rolled tape, double-sided tape or self-tapping screws; according to actual needs, adjust the display board 3 or the tissue model to the required inclination position, and the angle information of the position can be obtained through the inclination sensor.

[0078] In a preferred solution, the tilt sensor 303 is a three-axis tilt sensor.

[0079] The inclination sensor is a standard component. The three-axis inclination sensor can monitor the rotation angle around the three axes X, Y, and Z of the Cartesian coordinate system in real time. The choice of a two-axis or three-axis inclination sensor is determined according to the number of rotating axes of the display panel frame 3.

[0080] In a preferred solution, the display panel frame 3 includes a porous plate and a rear fixing plate 302 . A plurality of support columns 301 are provided between the rear fixing plate 302 and the porous plate. The tilt sensor 303 is provided at the center of the rear fixing plate 302 .

[0081] The porous plate is convenient for fixing the tissue model by tying or screwing. The support column 301 elevates the porous plate, so that there is a certain manual operation space between the porous plate and the rear fixing plate 302, which is convenient for screwing or tying.

[0082] In the preferred embodiment, the rotating joint group 315 includes a pitch rotating head 304 and a horizontal rotating sleeve 305, the pitch rotating head 304 and the horizontal rotating sleeve 305 are hinged, the support frame device includes a tripod 306, the tripod 306 is provided with multiple legs, the lower end of the legs is provided with a height-adjustable foot 307, the tripod 306 is provided with an adjustment rod 308 that can slide up and down, the horizontal rotating sleeve 305 is provided with a bushing 309 made of ceramic or copper, the upper end of the adjustment rod 308 is rotatably connected to the horizontal rotating sleeve 305, the upper end of the pitch rotating head 304 is provided with a rotation shaft 316, and the rotation shaft 316 is rotatably connected to the display panel frame 3.

[0083] The pitch rotating head 304 is provided with a thin neck, which raises the rear fixed plate 302 to prevent the rear fixed plate 302 from hitting the horizontal rotating sleeve 305 when rotating.

[0084] In the preferred embodiment, the adjustment rod 308 is provided with a slide groove 314, the tripod 306 is provided with a second locking knob 311, the end of the second locking knob 311 is provided with a second top block 313, the second top block 313 is stuck in the slide groove 314, and the end of the second top block 313 is against the slide groove 314.

[0085] In a preferred solution, the horizontal rotating sleeve 305 is provided with a first locking knob 310 , and a first top block 312 is provided at the end of the first locking knob 310 , and one end of the first top block 312 abuts against the side wall of the adjustment rod 308 .

[0086] Including correction methods,

[0087] Fix the fixed box 1 with the coordinate system tube 4 to the human body;

[0088] The coordinate system tube 4 and the human body are scanned together by CT or MRI;

[0089] The CT or MRI data of multiple single slices are stacked and reconstructed to form a virtual model;

[0090] 3D printing is performed using data obtained from CT or MRI scans, integrating the tissue model with the coordinate system established by the coordinate tube, or the coordinate tube itself, to form a solid model.

[0091] Place the physical tissue model with the coordinate system on the display stand 3, and use the cross-indicator line emitted by the laser level to calibrate the coordinate axis Z on the physical model to point to the center of gravity;

[0092] Use one of the horizontal light rays emitted by the laser level as the observation direction to locate the Y-axis direction;

[0093] Adjust the Y-axis of the solid model to be parallel to the viewing direction, and the orientation of the solid model is determined;

[0094] Record the three-axis angles of the tilt sensor 303 at this time or return to zero;

[0095] Adjust the angle of the display frame 3, find the area that needs to be observed, and perform coordinate system calibration. That is, align the model coordinate system (Z axis is the vertical direction of the earth, XY axis is the CT or MRI head-foot horizontal line and left and right horizontal lines) with the measurement coordinate system axis, and record the angle change of the display frame 3 at this time;

[0096] The angle difference is fed back to the C-arm device, and the human body lies at this angle to scan the key area. The adjustment value of each axis of the C-arm device is the difference.

[0097] In addition, the C-arm machine needs to be regularly adjusted to maintain its level and maintain contact with the earth coordinate system.

[0098] Including supplementary methods,

[0099] Producing a human body surface profiling mask;

[0100] During the first CT or MRI scan, the fixing box 1 is connected to the mask 7, and the mask 7 is fixed to the human body via the adhesive layer 701 or the straps;

[0101] After scanning is completed, the mask 7 is separated from the fixing box 1;

[0102] When the angle of the key observation area is determined and a C-arm scan is required, the mask 7 and the fixing box 1 are installed again, and the fixing box 1 is fixed on the human body using the mask 7 .

[0103] The preferred solution includes a mask making method:

[0104] The human body lies flat, and the light shielding film 702 is covered on the human body surface 703;

[0105] Inject the UV glue 705 into the transparent sealing bag 704, and lay the transparent sealing bag 704 filled with the UV glue 705 flat on the light shielding film 702;

[0106] The transparent sealing bag 704 is irradiated with an ultraviolet lamp to solidify the ultraviolet glue 705;

[0107] The solidified transparent sealing bag 704 is removed and the upper end surface is polished and smoothed to make a mask 7.

[0108] The lower end of the fixing box 1 can be made into a buckle or other quick-release structure to facilitate quick connection with the mask 7. The flat side of the mask 7 is attached to the bottom surface of the fixing box 1. The fixing box 1 is a public device, and the mask 7 is a customized device.

[0109] A one-way valve 706 can be provided on the transparent sealing bag 704 to facilitate the injection of the UV glue 705 and to smooth it out later. Alternatively, the UV glue 705 can be injected into the transparent sealing bag 704 and the gap can be sealed by tying or gluing.

[0110] Mask 7 is mainly made based on the specific structure of the human body, such as the sternum and clavicle. Since the human body structure has little difference in fluctuation, UV glue 705 does not need too much. It can generally solidify quickly within tens of seconds to minutes after exposure to UV light.

[0111] The main function of the light shielding film 702 is to prevent the human body from being excessively exposed to ultraviolet rays.

[0112] The mask 7 needs to be installed when the fixed box 1 is used for the first time. It should be worn every time a CT scan is required to establish a connection between the human body's own coordinate system and the coordinate system tube 4 in the fixed box 1 to prevent the coordinate system transmission chain of the entire link from being broken due to changes in the coordinates of the fixed box 1 relative to the human body.

[0113] like Figure 17Another way to make Mask 7 is to directly scan the human body contour through CT scanning to obtain a data model, and then 3D print Mask 7 based on the data model.

[0114] Example 2:

[0115] like Figure 1-3 A coordinate correction system for medical imaging based on a geodetic coordinate system includes a fixed box 1 and a swingable coordinate system tube 4 connected to the fixed box 1. The coordinate system tube 4 contains a contrast agent.

[0116] The fixed box 1 is also provided with a rotatable calibration plate 5, on which a cross mark 6 is provided, and the coordinate system tube 4 is connected to the calibration plate 5;

[0117] A rotatable display panel frame 3 is also provided. The display panel frame 3 is used to fix the tissue model. An inclination sensor 303 is provided on the display panel frame 3 .

[0118] The preferred solution also includes a swingable oscillator 2, which is provided with a hollow sleeve 202, a heavy hammer 201 at the lower end of the hollow sleeve 202, the coordinate system tube 4 is arranged in the calibration plate 5, and an insertion rod is provided at the lower end of the calibration plate 5, and the insertion rod of the calibration plate 5 is inserted into the hollow sleeve 202.

[0119] A ball joint seat 203 is provided at the upper end of the fixing box 1 , and the oscillator 2 is sleeved in the ball joint seat 203 .

[0120] The calibration plate 5 can rotate.

[0121] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A medical imaging coordinate correction system based on a geodetic coordinate system, characterized by: It comprises a fixed box (1), and is also provided with a swingable coordinate system tube (4), wherein the coordinate system tube (4) is connected to the fixed box (1); A rotatable calibration plate (5) is also provided on the fixed box (1), a cross mark (6) is provided on the calibration plate (5), and the coordinate system tube (4) is connected to the calibration plate (5); A rotatable display panel frame (3) is also provided. The display panel frame (3) is used to fix the tissue model. An inclination sensor (303) is provided on the display panel frame (3). The fixed box (1) is a box structure, the coordinate system tube (4) is arranged in the fixed box (1), the calibration plate (5) is arranged at the upper end of the fixed box (1), and is further provided with a universal joint (401), the lower end of the universal joint (401) is connected to the coordinate system tube (4), and the calibration plate (5) is provided with a rotating central axis (501), and the rotating central axis (501) passes through the fixed box (1) to be connected to the upper end of the universal joint (401); The central axis of the coordinate system tube (4) is aligned with the central axis of the calibration plate (5), and the coordinate system tube (4) and the calibration plate (5) can rotate synchronously on the same axis; A contrast agent is provided in the coordinate system tube (4).

2. The medical imaging coordinate correction system based on the geodetic coordinate system according to claim 1, characterized in that: It also includes a mask (7), one side of the mask (7) is used to connect to the human body, and the other side of the mask (7) is detachably connected to the fixing box (1).

3. The medical imaging coordinate correction system based on the geodetic coordinate system according to claim 2, characterized in that: The coordinate system tube (4) comprises a five-way tube sleeve (402), a first hollow tube (403), a second hollow tube (404) and a third hollow tube (405). The five-way tube sleeve (402) is provided with a plurality of openings, each opening being provided with a slot (406) and a clamp (407). The first hollow tube (403), the second hollow tube (404) and the third hollow tube (405) are respectively connected to the openings of the five-way tube sleeve (402) to form a three-axis orthogonal structure. The first hollow tube (403), the second hollow tube (404) and the third hollow tube (405) are filled with contrast agent.

4. The medical imaging coordinate correction system based on the geodetic coordinate system according to claim 2, characterized in that: The universal joint (401) includes an upper U-shaped block (408) and a lower U-shaped block (409). A central connecting block (410) is provided between the upper U-shaped block (408) and the lower U-shaped block (409). The central connecting block (410) is provided with a plurality of connecting shafts (411). Each connecting shaft (411) is rotatably connected to the central connecting block (410). The connecting shafts (411) form a cross structure. Each connecting shaft (411) is connected to the upper U-shaped block (408) and the lower U-shaped block (409) respectively.

5. The medical imaging coordinate correction system based on the geodetic coordinate system according to claim 4, characterized in that: A tensioner (412) is further provided in the central connecting block (410), a slidable sliding shaft (413) is provided in the tensioner (412), a plurality of openings are provided on the side wall of the tensioner (412) along the circumference, and a top ball (414) is provided at the opening. The top ball (414) is used to support the end surface of the connecting shaft (411), and the sliding shaft (413) is provided with a tapered surface (416). The sliding shaft (413) slides to tighten or loosen the tapered surface (416) against the top ball (414).

6. The medical imaging coordinate correction system based on the geodetic coordinate system according to claim 1, characterized in that: A support frame device is also provided. A rotating joint group (315) is provided on one side of the display panel frame (3). One end of the rotating joint group (315) is rotatably connected to the support frame device. The rotating axis of the rotating joint group (315) and the rotating axis of the rotating joint group (315) and the support frame device are arranged perpendicularly.

7. The method for medical imaging coordinate correction based on the geodetic coordinate system according to claim 1, characterized in that: Fixing the fixed box (1) with the coordinate system tube (4) to the human body; The coordinate system tube (4) and the human body are scanned together by CT or MRI; 3D printing is performed using data from CT or MRI scans, integrating the tissue model and coordinate system. Place the tissue model on the display board stand (3), adjust the angle of the display board stand (3), find the area that needs to be observed, and record the angle value of the display board stand (3) at this time; The angle value is fed back to the C-arm device, and the human body lies at that angle to scan the key area.

8. The medical imaging coordinate correction method based on the geodetic coordinate system according to claim 7, characterized in that: Includes supplementary methods: Producing a human body surface profiling mask; During the first CT or MRI scan, the fixing box (1) is connected to the mask (7), and the mask (7) is fixed to the human body via an adhesive layer (701) or a strap; After the scanning is completed, the mask (7) is separated from the fixed box (1); When the angle of the key observation area is determined and a C-arm scan is required, the mask (7) and the fixing box (1) are installed again, and the fixing box (1) is fixed on the human body using the mask (7).

9. The medical imaging coordinate correction method based on the geodetic coordinate system according to claim 7, characterized in that: Including mask creation method: The human body lies flat, and the light-shielding film (702) is covered on the surface layer (703) of the human body; Injecting the ultraviolet glue (705) into the transparent sealing bag (704), and laying the transparent sealing bag (704) filled with the ultraviolet glue (705) on the light shielding film (702); Using an ultraviolet lamp to irradiate the transparent sealing bag (704) to solidify the ultraviolet glue (705); Remove the solidified transparent sealing bag (704) and grind the upper end surface to make it smooth to form a mask (7).

Images