A stereo positioning image positioning frame

Abstract

This application discloses a stereoscopic positioning image positioning frame, including a CT positioning device and a fixation base. The CT positioning device includes a top fixing frame made of high-strength plastic. CT imaging panels are fixed to the front, left, and right sides of the top fixing frame, each containing an N-shaped marker pattern that is visible under CT images. The fixation base includes a front irregular crossbeam, a rear crossbeam, a left longitudinal beam, and a right longitudinal beam. Each fixing rod has a mounting part at its top for fixing to the user's skull. The CT positioning device and the fixation base are connected by a detachable connection structure, and in the connected state, the outer surfaces of the left and right longitudinal beams of the fixation base are flush with the outer surfaces of the left and right imaging panels of the CT positioning device. This stereoscopic positioning image positioning frame, equipped with marking patterns, facilitates subsequent automatic image positioning calibration and enhances user comfort and overall user experience.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a stereoscopic positioning image positioning frame. Background Technology

[0002] Currently, stereotactic frames are indispensable tools in stereotactic neurosurgery, used to establish a coordinate system in CT or MRI scans to assist surgeons in lesion localization and surgical planning. Existing stereotactic frames typically employ a fully enclosed metal frame structure, which, while meeting basic positioning requirements, still has several shortcomings in practical use. Firstly, traditional frames often obscure the user's face, causing claustrophobia during wear. Furthermore, the frame structure can obstruct the user's vision and airflow, leading to discomfort such as facial heat and breathing difficulties with prolonged wear, increasing the user's psychological burden and physical pain.

[0003] On the other hand, the existing connection structure between the positioning frame and the head fixation device is often complex or the fixation method is simple, making it difficult to achieve rapid and accurate positioning and adjustment. Moreover, the assembly efficiency between the various components of the frame is low, affecting the efficiency of surgical preparation. Therefore, there is an urgent need for a stereoscopic positioning image positioning frame that can improve user wearing comfort, enhance visual field and breathing patency, and is easy to assemble and adjust. Summary of the Invention

[0004] One objective of this application is to provide a stereo positioning image positioning frame that can at least solve the aforementioned technical problems in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solutions.

[0006] A stereoscopic positioning image positioning frame according to a first aspect of this application includes a CT positioning device and a fixing base. The CT positioning device includes a top fixing frame, which is made of high-strength plastic and is rectangular, with its four corners set at 45-degree angles. CT imaging panels are fixed to the front, left, and right sides of the top fixing frame, and each CT imaging panel contains an N-shaped mark pattern that can be visualized under CT images. The fixing base is made of high-strength metal and is rectangular, with its four corners set at 45-degree angles. The fixing base includes a front irregular crossbeam, a rear crossbeam, and a left... The device has a left longitudinal beam on one side and a right longitudinal beam on the other side. The outer surfaces of the left and right longitudinal beams are marked with scales. Fixing rods are installed inside the bends at both ends of the left and right longitudinal beams. Each bend has a fixing hole, and each fixing rod is adjustablely fixed in the corresponding fixing hole by fasteners. The top of each fixing rod has a mounting part for fixing to the user's skull. The CT positioning device is connected to the fixing base through a detachable connection structure. In the connected state, the outer surfaces of the left and right longitudinal beams of the fixing base are flush with the outer surfaces of the left and right imaging panels of the CT positioning device.

[0007] Optionally, the front CT imaging panel is irregularly shaped, with a triangular window at the bottom and a semi-circular window at the top; the left and right CT imaging panels are rectangular.

[0008] Optionally, the detachable connection structure includes connecting latches located at the lower part of the left side panel and the lower part of the right side panel, which are respectively fastened to the left and right longitudinal beams of the fixing base.

[0009] Optionally, the fixing rod has a long hollow strip; the fastener is a long rod shape, one end of which is inserted into the long hollow strip, and the other end is hollow and has an internal thread. The other end extends into the fixing hole from the inside of the fixing frame, and a screw is screwed into the internal thread of the fastener from the outside of the fixing frame.

[0010] Optionally, the fixing rods include long rods and short rods; wherein, the fixing rods located inside the angle between the right longitudinal beam and the irregular crossbeam, and inside the angle between the left longitudinal beam and the irregular crossbeam, are long rods. The fixing rods on the inside of the bend between the beam and the rear crossbeam, and on the inside of the bend between the left longitudinal beam and the rear crossbeam, are short rods.

[0011] Optionally, the upper part of each CT imaging panel is fixed to each side of the top fixing frame by screws, and the lower part of each CT imaging panel is fixedly connected to each other by panel connectors.

[0012] Optionally, the panel connector includes a first panel connector and a second panel connector, wherein the first panel connector... The first connector connects the lower right corner of the right panel to the lower left corner of the front panel, and the second panel connector connects the lower left corner of the left panel to the lower right corner of the front panel.

[0013] Optionally, the middle of the irregularly shaped crossbeam protrudes forward or is curved to avoid touching the user's nose.

[0014] Optionally, the outer surfaces of the left and right longitudinal beams of the mounting base are provided with scale markings.

[0015] Optionally, the CT imaging panel is made of methacrylic substrate.

[0016] In summary, this application provides a stereoscopic positioning image positioning frame. By setting triangular and semi-circular windows on the front CT imaging panel, it effectively solves the problems of claustrophobia, visual obstruction, and breathing difficulties for users, significantly improving wearing comfort. The irregularly shaped crossbeam prevents the frame from bumping against the user's nose. It also includes marked graphics to facilitate subsequent automatic image positioning calibration. The overall structure of this stereoscopic positioning image positioning frame is rationally designed, ensuring image positioning accuracy, greatly improving the user experience, and assisting in subsequent automatic image positioning calibration.

[0017] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0019] Figure 1 This is a schematic diagram of the overall structure of a stereoscopic positioning image positioning frame according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a stereoscopic positioning image positioning frame according to another embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the fixing seat of the stereoscopic positioning image positioning frame according to another embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a CT positioning device with a stereoscopic positioning image positioning frame according to another embodiment of the present invention; Figure 5 This is a schematic diagram showing the connection between the CT positioning instrument and the fixing base of the stereo positioning image positioning frame according to another embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a CT positioning instrument and a fixing base for a stereoscopic positioning image positioning frame according to another embodiment of the present invention.

[0020] Reference numerals: 100-Stereoscopic positioning image positioning frame, 10-CT positioning instrument, 101-Top fixing frame, 11-Front CT imaging panel, 12-Left CT imaging panel, 13-Right CT imaging panel, 14-N-shaped marking graphic, 15-Triangular window, 16-Semi-circular window, 17-First panel connector, 18-Second panel connector, 19-Connecting buckle, 20-Fixing base, 21-Irregular crossbeam, 22-Rear crossbeam, 23-Fixing rod, 24-45-degree bend, 25-Left longitudinal beam, 26-Right longitudinal beam, 27-Scale marking, 28-Long rod, 29-Short rod, 30-Fixing hole, 31-Fastener, 32-Long strip cutout, 33-Screw, 34-Mounting part, 35-Medical screw. Detailed Implementation

[0021] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0024] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 A stereoscopic positioning image positioning frame 100 is specifically described according to an embodiment of this application.

[0027] One embodiment of this application provides a stereoscopic positioning image positioning frame, including a CT positioning device 10 and a fixing base. The CT positioning device includes a top fixing frame, which is made of high-strength plastic and is rectangular in shape, with its four corners set at 45-degree angles. CT imaging panels are fixed to the front, left, and right sides of the top fixing frame, and each CT imaging panel contains an N-shaped mark pattern that can be visualized under CT images. The fixing base is made of high-strength metal and is rectangular in shape, with its four corners set at 45-degree angles. The fixing base includes a front irregular crossbeam, a rear crossbeam, and a left longitudinal beam on the left side. The device consists of a right longitudinal beam on the right side, a left longitudinal beam, and a right longitudinal beam. The outer surfaces of the left and right longitudinal beams are marked with scales. Fixing rods are installed inside the bends at both ends of the left and right longitudinal beams, and each bend has a fixing hole. Each fixing rod is adjustablely fixed in the corresponding fixing hole by fasteners. The top of each fixing rod has a mounting part for fixing to the user's skull. The CT positioning device is connected to the fixing base through a detachable connection structure. In the connected state, the outer surfaces of the left and right longitudinal beams of the fixing base are flush with the outer surfaces of the left and right imaging panels of the CT positioning device.

[0028] Specifically, such as Figure 1 and Figure 2 As shown, this embodiment provides a stereoscopic positioning image positioning frame 100, mainly used for CT image positioning assistance before surgery. The stereoscopic positioning image positioning frame 100 in this embodiment mainly consists of two core modules: a CT positioning device 10 and a fixing base 20. The CT positioning device 10 is responsible for providing positioning marks during CT image scanning, while the fixing base 20 is responsible for firmly anchoring the entire device to the user's head. The two are connected by a latch and work together.

[0029] In detail, such as Figure 2 As shown, the CT positioning device 10 includes a top fixing frame 101. In this embodiment, the top fixing frame 101 can be made of high-strength plastic material and has an overall rectangular structure. To optimize structural strength and reduce sharp corners, the four corners of the top fixing frame 101 in this embodiment can be set as follows: Figure 5 The 45-degree bend 36 is shown. CT imaging panels are fixedly mounted on the front, left, and right sides of the top fixing frame 101. For example, Figure 1As shown, a front CT imaging panel 11 is fixed to the front, a left CT imaging panel 12 is fixed to the left, and a right CT imaging panel 13 is fixed to the right. Each CT imaging panel contains an embedded N-shaped marker 14 that is visible under CT images. The N-shaped markers on the left, right, and front sides of the stereoscopic positioning image frame have the same geometric dimensions. The N-shaped markers on the left, right, and front sides are aligned horizontally. Furthermore, a horizontal line can be provided in the center of each N-shaped marker. This facilitates finding the center point of the two vertical lines and one diagonal line of the N-shaped marker, i.e., the center point of the N-shaped marker. It can also be used to determine the horizontal alignment of the N-shaped markers on the left, right, and front sides based on the horizontal line of the N-shaped markers on the left, right, and front sides. The height of the two vertical lines of the N-shaped marker on each side can be set to 140mm, and the distance between the two vertical lines can be set to 140mm. The diagonal line connects the upper left endpoint and the lower right endpoint. The angle between the diagonal line and the two vertical lines can be set to 45 degrees. During a CT scan, the N-shaped markers 14 on the three panels are clearly visible in the CT images, thus assisting the surgical planning software in constructing a three-dimensional coordinate system based on the CT images and further assisting the surgeon in calculating the precise three-dimensional coordinate position of the lesion. The advantage of this is that the N-shaped markers 14 on the three panels transform the spatial alignment work, which originally needed to be done manually before scanning, into a process where the software automatically identifies the markers, calculates, and calibrates the coordinate system after scanning. This achieves precise, efficient, and convenient automatic image calibration. Since the steps involved in achieving automatic image calibration using the N-shaped markers 14 are not the focus of this application, they will not be elaborated upon here.

[0030] Secondly, the fixing base 20 in this embodiment can be made of high-strength metal material, specifically aluminum alloy or titanium alloy, and has an overall rectangular frame shape, with its four corners also set as 45-degree bends 24. More specifically, as... Figure 3 As shown, the fixation base 20 may include a shaped crossbeam 21 located on the front side, a rear crossbeam 22 located on the rear side, a left longitudinal beam 25 located on the left side, and a right longitudinal beam 26 located on the right side. For ease of position reading during subsequent surgical planning, the outer surfaces of the left longitudinal beam 25 and the right longitudinal beam 26 are provided with scale markings 27. Additionally, the outer surface of the rear crossbeam 22 may also be provided with scale markings 27. Fixing rods 23 are installed inside the two end bends of the left longitudinal beam 25 and the right longitudinal beam 26, respectively. Each bend has a fixing hole 30, and the fixing rod 23 is adjustablely fixed in the corresponding fixing hole 30 using fasteners 31. The top of the fixing rod 23 has a mounting part 34, which is used for physical fixation to a specific position on the user's skull. In this embodiment, the fixing rod 23 is anchored to the skull surface using medical screws 35, thereby achieving a rigid fixed connection between the entire positioning frame and the user's head.

[0031] In this embodiment, the CT positioning device 10 and the fixing base 20 are connected by a detachable connection structure. It should be understood that, as Figure 1 and Figure 5 As shown, the detachable connection structure between the CT positioner 10 and the fixation base 20 refers to a structure that allows the two to be separated in a non-working state or during surgery, but can be quickly reassembled during the CT scan. In some other embodiments, this structure can be a snap-fit ​​connection or a sliding groove connection, as long as it can achieve a stable connection and quick separation. The advantage of this design is that after the user completes the CT scan, only the CT positioner 10 needs to be removed, while the fixation base 20 remains on the user's head, facilitating the installation and operation of subsequent surgical instruments and avoiding unnecessary physical pain caused by repeatedly disassembling the fixation base 20.

[0032] Furthermore, such as Figure 1 As shown, with the CT positioner 10 connected to the mounting base 20, the outer surfaces of the left longitudinal beam 25 and right longitudinal beam 26 of the mounting base 20 are flush with the outer surfaces of the left CT imaging panel 12 and right CT imaging panel 13 of the CT positioner 10. Simply put, if there is a step or height difference between the imaging panel and the longitudinal beam surfaces, artifacts are easily generated at the connection point during CT scanning due to the attenuation differences of X-rays in materials of different thicknesses. This interferes with the clarity of the N-shaped marker pattern 14 in the image, thus affecting subsequent positioning accuracy. Therefore, this embodiment effectively reduces the generation of scanning artifacts and ensures the accuracy of image data by setting the outer surfaces of both to be flush.

[0033] In one embodiment of this application, the front CT imaging panel is irregularly shaped, with a triangular window at the bottom and a semi-circular window at the top; the left and right CT imaging panels are rectangular.

[0034] Specifically, in this embodiment, the CT imaging panel 11 located on the front side can be designed as an irregular shape, with a triangular window 15 at the bottom and a semi-circular window 16 at the top. The CT imaging panel 12 on the left side and the CT imaging panel 13 on the right side in this embodiment can be designed as rectangles.

[0035] Let's discuss this in detail below, combining... Figure 4 As shown, the irregular shape of the front CT imaging panel 11 can be designed based on the comfort of the human face. In the prior art, conventional fully enclosed panels often obstruct the user's view, easily inducing claustrophobia, and the heat emitted from the face cannot be dissipated, resulting in poor user comfort. Compared to conventional designs, this embodiment, by providing a triangular window 15 at the bottom of the front CT imaging panel 11, adapts to the natural downward field of vision of the human eye. Figure 4As shown, when a user lies flat on the CT examination table wearing this positioning frame, the triangular window 15 provides a channel for the user to observe the outside environment or medical staff, thereby effectively relieving tension and eliminating claustrophobia. At the same time, the triangular window 15 also serves as the main breathing vent, avoiding breathing difficulties caused by panel obstruction.

[0036] Furthermore, the semi-circular window 16 at the top of the front CT imaging panel 11 in this embodiment primarily serves a ventilation function. Since the human face continuously dissipates heat within a closed space, heat can accumulate inside the panel, causing the user to feel stuffy. The semi-circular window 16 allows accumulated air to escape promptly, significantly improving the user's comfort while wearing the device. The left CT imaging panel 12 and right CT imaging panel 13 are located to the side of the user's field of vision, minimizing obstruction; therefore, a standard rectangular structure suffices to meet positioning requirements.

[0037] In some embodiments of this application, the detachable connection structure includes connecting buckles located at the lower part of the left side panel and the lower part of the right side panel, which are respectively fastened to the left and right longitudinal beams of the fixing base.

[0038] Specifically, the detachable connection structure between the CT positioning device 10 and the fixed base 20 in this embodiment may include two connecting buckles 19 located at the lower part of the left CT imaging panel 12 and the lower part of the right CT imaging panel 13. The connecting buckles 19 are respectively fastened to the left longitudinal beam 25 and the right longitudinal beam 26 of the fixed base 20.

[0039] Combination Figures 1 to 3 As shown, the connecting buckle 19 can be a quick-locking mechanism. In this embodiment, the connecting buckle 19 can be a flexible plastic buckle. This buckle structure is ingeniously designed, utilizing the elastic deformation of the material to achieve locking. When the CT positioner 10 needs to be installed on the mounting base 20, the installer only needs to apply downward pressure to the entire CT positioner 10. When the connecting buckle 19 contacts the longitudinal beam of the mounting base 20, it will undergo elastic deformation, slide past the edge of the longitudinal beam, and spring back to its original position, thus firmly fastening itself to the left longitudinal beam 25 and the right longitudinal beam 26. Conversely, when disassembly is required, the unlocking part of the connecting buckle 19 can be manually pushed outward to achieve immediate separation.

[0040] In another embodiment of this application, the fixing rod 23 is provided with a long strip of hollow; the fastener is in the shape of a long rod, one end of which is inserted into the long strip of hollow, and the other end is hollow inside and provided with internal thread. The other end extends into the fixing hole from the inside of the fixing frame, and a screw is screwed into the internal thread of the fastener from the outside of the fixing frame.

[0041] Specifically, such as Figures 1 to 3 As shown, the fixing rod 23 in this embodiment has a slot with a long, hollowed-out section 32. For example... Figure 3 As shown, the fastener 31 can be configured as a long rod, with one end inserted into the slot of the long, hollow strip 32, and the other end hollow inside with internal threads. This end extends from the inside of the fixing seat 20 into the fixing hole 30, and a screw 33 passes through the fixing hole 30 from the outside of the fixing seat 20 and is then screwed into the internal thread of the fastener 31. Figure 5 As shown, the fixing rod 23, as a key load-bearing component connecting the user's skull to the fixing base 20, requires precise adjustability in position. More specifically, the elongated cutout 32 extends along the length of the fixing rod 23, forming a travel space that allows the fastener 31 to slide within it. The fastener 31 is cleverly designed to combine both connection and locking functions. One end of the fastener 31 is designed as a snap-in end, its shape matching the width of the elongated cutout 32, allowing it to be embedded within the cutout and slide along it; the other end is designed as a connecting end, with an internally threaded hole. In the assembled state, the connecting end of the fastener 31 passes through the fixing hole 30 at the bend of the fixing base 20, allowing the fastener 31 to move relative to the fixing base 20, thereby moving the fixing rod 23. The adjustment process is described in detail below.

[0042] The adjustment process in this embodiment is as follows: When it is necessary to adjust the position of the fixing rod 23 to fit different users' head shapes, first operate the screw 33 to loosen it from the internal thread of the fastener 31, but it does not need to be completely removed. At this time, the squeezing force of the fastener 31 on the fixing rod 23 is released, and the fixing rod 23 is in a sliding state. Then, the operator pushes the fixing rod 23 along the extension direction of the long strip of hollow 32, and the snap-in end of the fastener 31 moves relative to each other in the hollow until the mounting part 34 at the top of the fixing rod 23 reaches the predetermined skull fixation point. After the position adjustment is completed, tighten the screw 33 from the outside of the fixing seat 20. The end of the screw 33 presses against the inner wall of the fixing seat 20, and the fastener 31, the fixing rod 23 and the fixing seat 20 are firmly locked by the axial force of the threaded pair.

[0043] In some other embodiments of this application, the fixing rod 23 includes a long rod and a short rod; wherein, the fixing rod 23 located inside the bend between the right longitudinal beam and the irregular crossbeam and inside the bend between the left longitudinal beam and the irregular crossbeam is a long rod, and the fixing rod 23 located inside the bend between the right longitudinal beam and the rear crossbeam and inside the bend between the left longitudinal beam and the rear crossbeam is a short rod.

[0044] Specifically, such as Figure 3 As shown, the fixing rod 23 in this embodiment can include two specifications: a long rod 28 and a short rod 29. Specifically, the fixing rod 23 located inside the angle between the right longitudinal beam 26 and the irregular crossbeam 21, and inside the angle between the left longitudinal beam 25 and the irregular crossbeam 21, can be configured as a long rod 28. The fixing rod 23 located inside the angle between the right longitudinal beam 26 and the rear crossbeam 22, and inside the angle between the left longitudinal beam 25 and the rear crossbeam 22, can be configured as a short rod 29.

[0045] Combination Figure 4 As shown, this asymmetrical layout of "longer in the front and shorter in the back" is not an arbitrary structural choice, but a targeted design based on the anatomical characteristics of the human skull. Simply put, in the fixed position of stereotactic surgery, the vertical distance from the user's forehead to the top of the head is usually large, and the forehead bone is flat, making it suitable as a primary support point. Therefore, the long rod 28 is installed on the side of the irregular crossbeam 21 at the front, ensuring that the mounting part 34 at the top of the long rod 28 accurately contacts the forehead skull, providing stable support.

[0046] Conversely, the curve of the back of the human head is relatively smooth and positioned low. If a long rod 28 is used on the rear side, the excessive length of the rod will not only extend excessively backward, increasing the overall size and weight of the device, but may also accidentally touch the user's neck or bed frame during adjustment, causing interference or even safety hazards. Therefore, a short rod 29 is provided on the side of the rear crossbeam 22, which can meet the fixation depth requirements of the back of the head and effectively avoid structural redundancy. It should be understood here that although this embodiment specifies the specific installation positions of the long rod 28 and the short rod 29, in actual applications, the specific length difference between the long rod 28 and the short rod 29 can be optimized based on user data of different age groups or head shapes, as long as the functional requirement of the front extension distance being greater than the rear extension distance is met.

[0047] In some other embodiments of this application, the upper part of each CT imaging panel is fixed to each side of the top fixing frame by screws, and the lower part of each CT imaging panel is fixedly connected to each other by panel connectors.

[0048] Specifically, the upper part of each CT imaging panel is fixed to each side of the top fixing frame 101 by screws 33, and the lower part of each CT imaging panel is fixedly connected to each other by panel connectors. The following is in conjunction with... Figure 6 In detail, since each CT imaging panel has a certain length and area, if it is only fixed by the screws at the top, the bottom of the panel becomes a free end. During user movement or vibration of the CT scanning table, the free end will produce slight swaying or flutter. This slight shaking may cause blurring of the edges of the N-shaped marker pattern 14 or produce artifacts on the CT image, thus affecting the accuracy of the positioning coordinate calculation. In this embodiment, by adding a panel connector at the bottom of the panel, the three originally independent panels, namely the front CT imaging panel 11, the left CT imaging panel 12, and the right CT imaging panel 13, are connected into an integral frame structure at the bottom, effectively eliminating the risk of independent shaking of individual panels and improving the overall structural rigidity and anti-interference capability of the CT positioning device 10. The panel connector will be described in detail below.

[0049] In some embodiments of this application, the panel connector includes a first panel connector and a second panel connector. The first panel connector connects the lower right corner of the right side panel to the lower left corner of the front side panel, and the second panel connector connects the lower left corner of the left side panel to the lower right corner of the front side panel.

[0050] Specifically, as shown in Figure 5, the panel connectors in this embodiment may include a first panel connector 17 and a second panel connector 18. The first panel connector 17 connects the lower right corner of the right CT imaging panel 13 to the lower left corner of the front CT imaging panel 11, and the second panel connector 18 connects the lower left corner of the left CT imaging panel 12 to the lower right corner of the front CT imaging panel 11. In short, the first panel connector 17 and the second panel connector 18 are typically made of high-strength plastic and are fixed to the corners of adjacent panels by screws.

[0051] In one embodiment of this application, the middle part of the irregular crossbeam protrudes forward or is arc-shaped to avoid touching the user's nose.

[0052] Specifically, combined Figure 4 As shown, the fixing base 20 serves as the base worn directly on the user's head, and the irregularly shaped crossbeam 21 on its front side corresponds precisely to the bridge of the nose area of ​​the human face. In the prior art, conventional positioning frame crossbeams are usually designed as straight rod-like structures. Although this design is simple to manufacture, in actual wear, the straight crossbeam is very likely to physically interfere with the user's bridge of the nose. Since different users have different bridge heights of their noses, the straight crossbeam often directly compresses the soft tissue of the nose, and prolonged wear can lead to pressure sores, pain, or even skin damage, seriously affecting the user's wearing comfort.

[0053] To address this issue, this embodiment designs the middle section of the irregularly shaped beam 21 to protrude forward or be curved, creating a clearance space between the irregularly shaped beam 21 and the user's nose. It should be understood that "protruding forward" here means that the irregularly shaped beam 21 protrudes away from the user's face along the front-back direction of the positioning frame, or that the irregularly shaped beam 21 itself is curved outward. This non-linear configuration effectively increases the distance between the middle section of the irregularly shaped beam 21 and the tip and bridge of the user's nose. When the user wears the fixing seat 20, the nose can naturally be accommodated within the recessed or clearance area of ​​the irregularly shaped beam 21, thereby eliminating the pressure caused by structural interference.

[0054] In some embodiments of this application, the outer surfaces of the left and right longitudinal beams of the fixing seat are provided with scale markings.

[0055] Specifically, combined Figure 4As shown, the scale markings 27 extend along the length of the left longitudinal beam 25 and the right longitudinal beam 26, and are used to assist in the precise installation of subsequent orientation instruments during the surgical planning stage. It should be understood that these scale markings 27 can be formed using various processes such as laser etching, mechanical scribing, or printed coating, and their numerical readings correspond to specific spatial coordinate positions. In practical applications, when surgeons need to install surgical guidance devices based on coordinate points determined by CT images, they can directly read the values ​​of the scale markings 27 on the left and right longitudinal beams 25 and 26 to quickly locate the installation position, avoiding errors and wasted time caused by repeated measurements. The advantage of this approach is that this visual scale design transforms abstract image coordinates into intuitive physical scales, improving the efficiency and accuracy of surgical preparation.

[0056] In some other embodiments of this application, the CT imaging panel is made of methacrylic acid substrate.

[0057] Specifically, the CT imaging panel in this embodiment can be made of methacrylic acid sheet, i.e., acrylic sheet. Methacrylic acid sheet (PMMA) has excellent physical properties, making it an ideal material for manufacturing CT imaging panels. In detail below, firstly, this material has extremely high light transmittance, reaching over 92%, allowing medical personnel to directly observe the user's facial condition through the panel. Secondly, this material has good mechanical strength and impact resistance, able to withstand minor bumps during daily use without easily breaking, ensuring the device's lifespan. More importantly, methacrylic acid sheet has unique imaging advantages in the CT imaging environment. Compared to metal materials, which are prone to severe metal artifacts interfering with positioning markers, methacrylic acid sheet has a moderate attenuation coefficient for X-rays. This characteristic results in the panel body presenting a low-density background in CT images, forming a clear contrast with the N-shaped marker pattern 14 set within the panel, ensuring sharp edges and no artifacts on the N-shaped marker pattern 14, thereby greatly improving the accuracy of positioning coordinate calculation. It should be understood here that although methacrylic acrylic sheets are preferred in this embodiment, other polymer composite materials or special glass materials may also be selected, provided that the requirements for light transmittance, strength and development are met.

[0058] In summary, this application provides a stereoscopic positioning image positioning frame. By setting triangular and semi-circular windows on the front CT imaging panel, it effectively solves the problems of claustrophobia, visual obstruction, and breathing difficulties for users, significantly improving wearing comfort. The irregularly shaped crossbeam prevents the frame from bumping against the user's nose. It also includes marked graphics to facilitate subsequent automatic image positioning calibration. The overall structure of this stereoscopic positioning image positioning frame is rationally designed, ensuring image positioning accuracy, greatly improving the user experience, and assisting in subsequent automatic image positioning calibration.

[0059] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A stereoscopic positioning image positioning frame, characterized in that, The device includes a CT positioning instrument and a mounting base. The CT positioning instrument includes a top fixing frame, which is made of high-strength plastic and is rectangular with four 45-degree bends at its four corners. CT imaging panels are fixed to the front, left, and right sides of the top fixing frame, and each CT imaging panel contains an N-shaped marker graphic that can be visualized under CT images. The fixing base is made of high-strength metal and is rectangular in shape, with its four corners set at 45-degree angles. The fixing base includes a front irregular crossbeam, a rear crossbeam, a left longitudinal beam on the left side, a right longitudinal beam on the right side, and left and right longitudinal beams. The outer surfaces of the left and right longitudinal beams are marked with scales. Fixing rods are installed inside the two corners of the left and right longitudinal beams, and each corner is provided with a fixing hole. Each fixing rod is adjustablely fixed in the corresponding fixing hole by fasteners. The top of each fixing rod is provided with a mounting part for fixing to the user's skull. The CT positioning device is connected to the fixed base via a detachable connection structure, and in the connected state, the outer surfaces of the left and right longitudinal beams of the fixed base are flush with the outer surfaces of the left and right imaging panels of the CT positioning device.

2. The stereoscopic positioning image positioning frame according to claim 1, characterized in that, The front CT imaging panel is irregularly shaped, with a triangular window at the bottom and a semi-circular window at the top; the left and right CT imaging panels are rectangular.

3. The stereoscopic positioning image positioning frame according to claim 2, characterized in that, The detachable connection structure includes connecting buckles located at the lower part of the left side panel and the lower part of the right side panel, which are respectively fastened to the left and right longitudinal beams of the fixing base.

4. The stereoscopic positioning image positioning frame according to claim 3, characterized in that, The fixing rod has a long hollow strip; the fastener is a long rod shape, one end of which is inserted into the long hollow strip, and the other end is hollow and has an internal thread. The other end extends into the fixing hole from the inside of the fixing frame, and a screw is screwed into the internal thread of the fastener from the outside of the fixing frame.

5. The stereoscopic positioning image positioning frame according to claim 4, characterized in that, The fixing rod includes a long rod and a short rod; wherein, the fixing rod located inside the bend between the right longitudinal beam and the irregular crossbeam and inside the bend between the left longitudinal beam and the irregular crossbeam is a long rod, and the fixing rod located inside the bend between the right longitudinal beam and the rear crossbeam and inside the bend between the left longitudinal beam and the rear crossbeam is a short rod.

6. The stereoscopic positioning image positioning frame according to claim 5, characterized in that, The upper part of each CT imaging panel is fixed to each side of the top fixing frame by screws, and the lower part of each CT imaging panel is fixedly connected to each other by panel connectors.

7. The stereoscopic positioning image positioning frame according to claim 6, characterized in that, The panel connector includes a first panel connector and a second panel connector. The first panel connector connects the lower right corner of the right side panel to the lower left corner of the front side panel, and the second panel connector connects the lower left corner of the left side panel to the lower right corner of the front side panel.

8. The stereoscopic positioning image positioning frame according to claim 7, characterized in that, The irregularly shaped crossbeam protrudes forward or is arc-shaped in the middle to avoid touching the user's nose.

9. The stereoscopic positioning image positioning frame according to claim 8, characterized in that, The outer surfaces of the left and right longitudinal beams of the fixed seat are marked with scale markings.

10. The stereoscopic positioning image positioning frame according to claim 9, characterized in that, The CT imaging panel is made of methacrylic acid substrate.

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