CT simulation room head and neck fixation device

Abstract

The invention discloses a head and neck fixing device for a CT simulation room, which comprises a head and neck shoulder pad and a head and neck fixing part, wherein the head and neck fixing part comprises a head and neck thermoplastic film and a clamping block, and the head and neck shoulder pad comprises a head and neck pad block and a shoulder pad block connected to the head and neck pad block; the inner contours of the head and neck pad block and the shoulder pad block are the same as the inner contours of the head and neck pad plate and the shoulder pad plate of a magnetic resonance head and neck fixing device; the head and neck pad block comprises an arc-shaped accommodating plate and an arc-shaped enclosing plate connected to the edge of the top wall of the arc-shaped accommodating plate and extending downward to form an arc-shaped accommodating plate; the height of the arc-shaped enclosing plate is greater than or equal to the height of the arc-shaped accommodating plate and is equal to the height of the shoulder pad block; a locking mechanism for fixing the head and neck thermoplastic film is installed at the top surface of the arc-shaped accommodating plate and at the position corresponding to the locking part of the magnetic resonance head and neck fixing device; the shoulder pad is an arc-shaped plate with an accommodating groove for accommodating the shoulders and back of a patient; a shoulder pressing mechanism for pressing the shoulders of the patient is installed on the arc-shaped accommodating plate and the arc-shaped enclosing plate at the connection with the shoulder pad block.

Description

Technical Field

[0001] The invention relates to a positioning device on a CT scanning device and a radiotherapy device in the medical field, and in particular to a head and neck fixing device for a CT simulation room. Background Art

[0002] After the head and neck are scanned clinically, in order to ensure the accuracy of the scanned image, the patient needs to be scanned again on the MRI in the same position as during the CT scan. The location of the patient's lesion is determined by combining the images after the two scans. After the location of the lesion is determined, the patient is allowed to maintain the same position in the radiotherapy equipment for radiotherapy.

[0003] Since scanning and radiotherapy both take a long time, and it is difficult for the patient's head and neck to maintain one position for a long time, the image consistency during CT and MRI scans is often affected by the movement of position, making the lesion location inaccurate. In addition, during reduction treatment, inaccurate reduction will affect the effect of radiotherapy and even affect normal cells. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the head and neck fixing device for a CT simulation room provided by the present invention can fix the patient's head when scanning images to prevent the patient from shifting when scanning images.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] Provided is a head and neck fixation device for a CT simulation room, comprising a head and neck shoulder pad and a head and neck fixation portion;

[0007] The head and neck fixing part comprises a head and neck thermoplastic film and a plurality of clamping blocks fixed on the edge of the head and neck thermoplastic film;

[0008] The head, neck and shoulder pad comprises a head and neck pad and a shoulder pad connected to the head and neck pad as a whole; the inner contours of the head and neck pad and the shoulder pad are the same as the inner contours of the head and neck pad and the shoulder pad of the magnetic resonance head and neck fixation device;

[0009] The head and neck pad includes an arc-shaped accommodation plate having an arc-shaped accommodation cavity for accommodating the patient's head and neck, and an arc-shaped enclosure plate connected to the edge of the top wall of the arc-shaped accommodation plate and extending downward to enclose the arc-shaped accommodation plate; the height of the arc-shaped enclosure plate is greater than or equal to the height of the arc-shaped accommodation plate and is equal to the height of the shoulder pad;

[0010] The top surface of the arc-shaped accommodation plate and the locking portion of the magnetic resonance head and neck fixing device are both provided with locking mechanisms that cooperate with the clamping blocks that fix the edge of the head and neck thermoplastic film;

[0011] The shoulder pad is an arc-shaped plate with a receiving groove for receiving the patient's shoulders; the arc-shaped receiving plate and the arc-shaped surrounding plate connected with the shoulder pad are equipped with a shoulder pressing mechanism for pressing the patient's shoulders.

[0012] Furthermore, the locking mechanism includes a fixing block, which is locked on the top surface of the arc-shaped accommodation plate by a locking member; a strip groove for clamping the clamping block is provided on the fixing block extending above the accommodation cavity;

[0013] The clamping block at the edge of the head and neck thermoplastic film is L-shaped, one end of which is hooked in the strip groove, and the other end is provided with a clamping groove, and the edge of the head and neck thermoplastic film is clamped and fixed in the clamping groove.

[0014] Furthermore, the shoulder pressing mechanism includes an arc-shaped shoulder pressing block and a shoulder pressing base fixed on the arc-shaped enclosure plate and movable along the length direction of the arc-shaped enclosure plate. The arc-shaped shoulder pressing block is provided with a sliding groove for adjusting the distance between the top surface of the arc-shaped shoulder pressing block and the arc-shaped containing plate. The arc-shaped shoulder pressing block is fixed to the shoulder pressing base by a locking member passing through the sliding groove.

[0015] Furthermore, a plurality of interconnected mounting holes are provided on the arc-shaped enclosure plate and the arc-shaped receiving plate, the shoulder pressure base is installed in the mounting hole of the arc-shaped enclosure plate through a locking piece, and the lower end of the arc-shaped shoulder pressure block passes through the mounting hole on the arc-shaped receiving plate.

[0016] Furthermore, scale lines are provided on the arc-shaped shoulder block and at the mounting holes of the arc-shaped enclosure plate.

[0017] Furthermore, the head and neck fixation device of the CT simulation room also includes a shoulder fixing part, which includes a shoulder thermoplastic film and a plurality of clamping blocks fixed to the shoulder thermoplastic film; the clamping blocks of the shoulder fixing part are installed on the arc-shaped containing plate and the arc-shaped surrounding plate at the connection with the shoulder pad through a shoulder positioning mechanism, and can move along the length direction of the shoulder pad.

[0018] Furthermore, the shoulder positioning mechanism includes a shoulder positioning seat, a slider and a shoulder pressure rod, and the shoulder positioning seat is locked in the mounting hole on the arc-shaped enclosure plate by a locking member; a strip groove is provided on the side of the shoulder positioning seat facing away from the head and neck pad;

[0019] The shoulder pressure rod is fixed in the strip groove by matching the locking piece with the mounting hole in the strip groove; a sliding groove is opened on the shoulder pressure rod, and the slider is fixed on the shoulder pressure rod by using a locking piece passing through the sliding groove; the clamping block at the edge of the shoulder thermoplastic film is installed in the sliding groove to fix the shoulder thermoplastic film on the shoulder positioning mechanism.

[0020] Furthermore, scale lines are provided at the mounting holes of the arc-shaped enclosure plate and on the shoulder pressure rod.

[0021] Furthermore, the head and neck fixation device for the CT simulation room also includes a nose pressing mechanism for pressing the patient's nose; the nose pressing mechanism includes a nose pressing suspension beam, a nose pressing longitudinal beam, and an arched frame installed on the fixing blocks of two locking mechanisms adjacent to the shoulder pads;

[0022] A transverse slide groove is provided at the top of the arch frame, and a nose pressing suspension beam is installed in the transverse slide groove through a locking piece; a longitudinal slide groove is provided on the nose pressing suspension beam, and a vertical slide groove is provided on the nose pressing longitudinal beam, and at least one nose pressing longitudinal beam is fixed on the nose pressing suspension beam through a locking piece passing through the longitudinal slide groove and the vertical slide groove; the lower surface of the nose pressing longitudinal beam has an arc surface that fits the nose.

[0023] Furthermore, a plurality of through holes for reducing artifacts are provided on the head, neck and shoulder pad.

[0024] The beneficial effects of the present invention are as follows: during image scanning, a foam / position fixing bag is placed in the inner cavity of the head, neck and shoulder pad, and after the patient lies in the head, neck and shoulder pad, the ironed head and neck thermoplastic film is laid on the patient's face and neck, and the edges are stretched to fit the patient's face and neck, and then fixed on the locking mechanism to complete the patient's head and neck position positioning.

[0025] After positioning in the above manner, the patient's face and shoulders can be positioned by the corresponding components, so that the patient's head, neck and shoulders are fully positioned during image scanning, thereby ensuring that the patient always maintains the same position during long-term scanning, thereby ensuring the accuracy of the scanned image.

[0026] In this solution, the inner contours of the head and neck pads and the shoulder pads are designed to be the same as the inner contour dimensions of the head and neck pads and the shoulder pads of the head and neck fixation device in the CT simulation room. In this way, when it is necessary to combine the MRI scan with the CT scan to improve the accuracy of the image, the foam rubber / position fixation bag and the head and neck thermoplastic film placed in the head and neck shoulder pads can be taken out and placed in the magnetic resonance head and neck fixation device. The patient's position can be adjusted by the concave and convex human body contours on the foam rubber / position fixation bag and the head and neck thermoplastic film to ensure the consistency of the patient's position on the two devices.

[0027] In addition, the shoulder pad of the fixing device of the present invention is equal in height to the arc-shaped enclosure, so that the fixing device can be placed stably on a flat surface, so that the device can be directly placed in the CT machine for scanning; after the lesion is determined, when performing repositioning radiotherapy, the device can be directly applied to the radiotherapy equipment to position the patient's position for radiotherapy, ensuring the accuracy of repositioning and the effect of radiotherapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a three-dimensional image of the head and neck fixation device in the CT simulation room.

[0029] Figure 2It is a stereoscopic view of an embodiment of a head and neck fixation device in a CT simulation room.

[0030] Figure 3 For the head and neck fixation device in the CT simulation room Figure 2 A three-dimensional image after removing the head and neck thermoplastic film and the shoulder thermoplastic film.

[0031] Figure 4 This is a three-dimensional diagram of the shoulder pressing mechanism.

[0032] Figure 5 It is a three-dimensional diagram of the nose pressing mechanism.

[0033] Figure 6 This is a three-dimensional view of a head, neck and shoulder pad after multiple locking mechanisms and a shoulder positioning mechanism are installed.

[0034] Figure 7 It is a stereoscopic view of another embodiment of the head and neck fixation device in a CT simulation room.

[0035] Figure 8 for Figure 7 Front view of the head and neck fixation device in the CT simulation room.

[0036] Fig. 9 A three-dimensional image of a head, neck and shoulder pad.

[0037] Fig.10 This is a three-dimensional image of the head, neck and shoulder pad as seen from the rear.

[0038] Fig.11 It is a three-dimensional diagram of the shoulder positioning mechanism.

[0039] Fig.12 A stereoscopic view of a magnetic resonance imaging head and neck fixation device.

[0040] Fig.13 Stereoscopic image after removal of the head and neck thermoplastic film for the MRI head and neck fixation device.

[0041] Fig.14 It is a three-dimensional schematic diagram of the locking mechanism and the clamping block being fixed together.

[0042] Fig.15 It is the front view of the head and neck fixing part.

[0043] Fig.16 It is a side view of the head and neck fixation part.

[0044] Among them, 1. head and neck shoulder pad; 11. head and neck pad; 111. arc-shaped receiving plate; 112. arc-shaped enclosure; 1121. mounting hole; 113. through hole; 12. shoulder pad; 13. locking mechanism; 131. fixing block; 1311. strip groove; 132. clamping block; 133. wedge block; 1321. clamping groove; 133. locking piece; 2. head and neck thermoplastic film; 3. shoulder pressing mechanism; 31. arc-shaped shoulder pressing block; 311. slide groove; 32. shoulder pressing base; 4. shoulder thermoplastic film;

[0045] 5. Shoulder positioning mechanism; 51. Shoulder positioning seat; 511. Strip groove; 52. Sliding block; 53. Shoulder pressure rod; 531. Sliding groove; 6. Nose pressing mechanism; 61. Nose pressing suspension beam; 611. Longitudinal slide groove 311; 62. Nose pressing longitudinal beam; 621. Vertical slide groove 311; 622. Arc surface; 623. Nose pressing pad; 624. Nose pressing block 132; 625. Nose pressing mounting beam; 63. Arched frame; 631. Horizontal slide groove 311; 7. Foam / position fixing bag; 8. MRI head and neck fixing device; 81. Head and neck pad; 82. Shoulder pad; 83. Locking part. DETAILED DESCRIPTION

[0046] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0047] like Figure 1 and Figure 3 As shown, the head and neck fixation device of the CT simulation room includes a head and neck shoulder pad 1 and a head and neck fixation part, wherein the head and neck shoulder pad 1 is an integrated hard shell made of carbon fiber, which has the advantages of light weight, high rigidity, and no artifacts in CT scanning positioning.

[0048] like Fig.15 and Fig.16 As shown, the head and neck fixing part includes a head and neck thermoplastic film 2 and a plurality of clamping blocks 132 fixed to the edge of the head and neck thermoplastic film 2. The shapes of the head and neck thermoplastic film 2 and the shoulder thermoplastic film 4 shown in all the figures of this scheme are only a schematic diagram and are not equivalent to the actual product appearance. When performing CT scanning, in order to ensure the comfort and accurate positioning of the patient's head, neck and shoulders, a foam glue / position fixing bag 7 can be placed in the head, neck and shoulder pad 1, so that when the patient is examined, a concave and convex structure matching the human body position is formed on the foam glue / position fixing bag 7.

[0049] The thermoplastic film used in this solution (the thermoplastic film includes the head and neck thermoplastic film 2 and the shoulder thermoplastic film 4) is a relatively common thermoplastic film in the process of tumor radiotherapy. It is generally softened at a water temperature of 75 degrees, and then applied to the face and shoulders of the human body, and solidified at room temperature to form a three-dimensional structure consistent with the corresponding patient's contour; when the head and neck thermoplastic film 2 is applied to the patient, sometimes a layer of gauze is first laid on the human body to alleviate the human body's discomfort to higher temperatures.

[0050] The foam glue / position fixing bag 7 placed in the head, neck and shoulder pad 1 of the present invention and the head and neck thermoplastic film 2 applied to the patient's face and neck after hot stamping have a concave-convex structure that is consistent with the patient's body position during scanning images. Therefore, during radiotherapy, the patient can adjust the body position during radiotherapy according to the foam glue / position fixing bag 7 and the head and neck thermoplastic film 2 to ensure that the patient's body position during radiotherapy is consistent with the body position during CT scanning, thereby achieving precise repositioning and improving the radiotherapy effect.

[0051] like Figure 6 , Fig. 9 and Fig.10 As shown, the head and neck shoulder pad 1 includes a head and neck pad 11 and a shoulder pad 12 connected to the head and neck pad 11 as a whole; the inner contours of the head and neck pad 11 and the shoulder pad 12 are the same as the inner contours of the head and neck pad 81 and the shoulder pad 82 of the magnetic resonance head and neck fixation device 8, wherein the stereoscopic diagram of the magnetic resonance head and neck fixation device 8 can be referred to Fig.12 and Fig.13 .

[0052] After the inner contours of the head and neck pad 11 and the shoulder pad 12 are set in the above manner, the foam glue / position fixing bag 7 and the head and neck thermoplastic film 2 used in the CT scanning process can be directly placed on the magnetic resonance head and neck fixation device 8 to fix the patient's position. This can ensure that the patient is in the same position when the two devices are scanning. The combination of the two devices can improve the quality of the scanned image to ensure the accurate positioning of the patient's lesions and accurate radiotherapy after reduction.

[0053] like Fig. 9 and Fig.10 As shown, the head and neck pad 11 includes an arc-shaped containing plate 111 having an arc-shaped containing cavity for accommodating the patient's head and neck, and an arc-shaped enclosure plate 112 connected to the edge of the top wall of the arc-shaped containing plate 111 and extending downward to enclose the arc-shaped containing plate 111; the height of the arc-shaped enclosure plate 112 is greater than or equal to the height of the arc-shaped containing plate 111, and is equal to the height of the shoulder pad 12.

[0054] Among them, the arc-shaped enclosure 112 is mainly used to support the head and neck of the human body to ensure the stability of the patient when lying on it for scanning; when this device is applied to CT scanning fixation and radiotherapy fixation, it is not restricted by the internal structure of the corresponding equipment, so that the arc-shaped enclosure 112 of this scheme is not limited to the arc-shaped structure shown in the figure, it can also be square or elliptical, as long as the height meets the above requirements, stable support can be achieved.

[0055] During implementation, the present solution preferably has a plurality of through holes 113 for reducing artifacts on the head, neck and shoulder pad 1. In order to make the scanned image have better quality, the present solution has a plurality of through holes 113 on the top surface of the arc-shaped receiving plate 111, the side surface of the arc-shaped enclosure plate 112 with the mounting holes 1121, and the side surface of the shoulder pad 12 adjacent to the head, neck and shoulder pad 1.

[0056] like Figure 3 , Figure 6 and Fig.14 As shown, a locking mechanism 13 for fixing the head and neck thermoplastic film 2 is installed at the top surface of the arc-shaped accommodation plate 111 and the position corresponding to the locking portion 83 of the magnetic resonance head and neck fixing device 8; when implemented, the locking mechanism 13 includes a fixing block 131, and the fixing block 131 is locked on the top surface of the arc-shaped accommodation plate 111 by a locking member 133; a strip groove 1311 for clamping a clamping block 132 is provided on the fixing block 131 extending above the accommodation cavity; the clamping block 132 is L-shaped, one end of which is hooked in the strip groove 1311, and the other end is provided with a clamping groove 1321, and the edge of the head and neck thermoplastic film 2 is clamped in the clamping groove 1321.

[0057] In order to prevent the clamping block 132 from being hooked in the strip groove 1311 and becoming loose, the clamping block 132 may be placed in the strip groove 1311 and then a wedge block 133 may be inserted into the strip groove 1311 to fix the clamping block 132 in the strip groove 1311 .

[0058] Among them, the head and neck thermoplastic film 2 and the card slot 1321 can be fixed by interference fit, or the head and neck thermoplastic film 2 can be fixed by the locking piece 133 after being stuck in the card slot 1321, or the head and neck thermoplastic film 2 is placed in the card slot 1321 and fixed by adhesive; in order to ensure the stability of the fixation and facilitate subsequent removal and placement on the radiotherapy positioning device or the magnetic resonance head and neck fixation device 8, this scheme preferably uses the locking piece 133 to fix the head and neck thermoplastic film 2.

[0059] After the head and neck thermoplastic film 2 is scalded with hot water, it is laid on the patient's face and neck, and its edges are stretched to make it completely fit the patient's face and neck to form a concave and convex face and neck structure, and then the card block 132 on the edge of the head and neck thermoplastic film 2 is inserted into the card groove 1321 of the fixing block 131 to fix the head and neck fixing part.

[0060] The shoulder pad 12 is an arc-shaped plate with a receiving groove for receiving the patient's shoulders; the arc-shaped receiving plate 111 and the arc-shaped surrounding plate 112 connected to the shoulder pad 12 are provided with a shoulder pressing mechanism 3 for pressing the patient's shoulders. The shoulder pressing mechanism 3 can give a downward force to the patient's shoulders to prevent the patient from twisting his shoulders during the image scanning process to affect the positioning of the head and neck.

[0061] The shoulder pressing mechanism 3 of this solution is mainly used to confirm the location of the patient's lesion in the head and neck.

[0062] like Figure 4 As shown, in one embodiment of the present invention, the shoulder pressing mechanism 3 includes an arcuate shoulder pressing block 31 and a shoulder pressing base 32 fixed on the arcuate enclosure plate 112 and movable along the length direction of the arcuate enclosure plate 112. The arcuate shoulder pressing block 31 is provided with a slide groove 311 for adjusting the distance between the top surface of the arcuate shoulder pressing block 31 and the arcuate receiving plate 111. The arcuate shoulder pressing block 31 is fixed to the shoulder pressing base 32 by a locking piece 133 passing through the slide groove 311.

[0063] The process of pressing the patient's shoulder by the shoulder pressing mechanism 3 is as follows: first, the position of the shoulder pressing base 32 installed on the arc-shaped enclosure 112 is adjusted according to the width of the patient's shoulder, and then the position of the arc-shaped shoulder pressing block 31 in the slide groove 311 is adjusted to make the arc-shaped shoulder pressing block 31 contact with the patient's shoulder to complete the pressing of the patient's shoulder; if there are scale lines, the positions of the shoulder pressing base 32 and the arc-shaped shoulder pressing block 31 also need to be recorded through the scale lines.

[0064] Among them, a plurality of interconnected mounting holes 1121 are opened on the arc-shaped enclosure plate 112 and the arc-shaped containing plate 111, the shoulder pressure base 32 is installed in the mounting hole 1121 of the arc-shaped enclosure plate 112 through the locking piece 133, and the lower end of the arc-shaped shoulder pressure block 31 passes through the mounting hole 1121 on the arc-shaped containing plate 111.

[0065] The shoulder pressing mechanism 3 is moved in different mounting holes 1121 installed on the arc-shaped enclosure plate 112 to adapt to the shoulder widths of different patients. The distance between the arc-shaped shoulder pressing block 31 and the shoulder pressing base 32 is adjustable, so that it can adapt to patients of different degrees of fatness and thinness. The shoulder pressing mechanism 3 is adjusted in two directions to ensure that it can adapt to different groups of people.

[0066] Scale lines are set on the arc-shaped shoulder pressure block 31 and at the mounting hole 1121 of the arc-shaped enclosure 112; the setting of the scale lines here can conveniently record the movement displacement of the shoulder pressure base 32 and the arc-shaped shoulder pressure block 31 during the patient's CT scanning positioning, so that during magnetic resonance scanning and resetting radiotherapy, accurate positioning can be quickly achieved based on the data recorded during the image scanning.

[0067] like Figure 2 , Figure 3 and Figure 7 As shown, the head and neck fixing device for the CT simulation room further includes a shoulder fixing part, which includes a shoulder thermoplastic film 4 and a plurality of clamping blocks 132 clamped on the shoulder thermoplastic film 4; the shoulder thermoplastic film 4 is mounted on the arc-shaped receiving plate 111 and the arc-shaped enclosing plate 112 at the connection with the shoulder pad 12 through the shoulder positioning mechanism 5, and can move along the length direction of the shoulder pad 12. When the shoulder thermoplastic film 4 is provided, the shoulder thermoplastic film 4 and the head and neck thermoplastic film 2 can be of an integrated design.

[0068] The shoulder thermoplastic film 4 and the shoulder positioning mechanism 5 cooperate with each other to fully cover the patient's shoulder, which is mainly used for detection when there are lesions on the shoulder; wherein, the shoulder positioning mechanism 5 and the shoulder pressing mechanism 3 have the same installation position, and are both installed in a plurality of interconnected installation holes 1121 on the arc-shaped accommodating plate 111 and the arc-shaped surrounding plate 112; when the patient's shoulder is pressed, only one of the shoulder positioning mechanism 5 and the shoulder pressing mechanism 3 can be selected.

[0069] like Fig.11 As shown, in one embodiment of the present invention, the shoulder positioning mechanism 5 includes a shoulder positioning seat 51, a slider 52 and a shoulder pressure rod 53. The shoulder positioning seat 51 is locked in the mounting hole 1121 on the arc-shaped enclosure plate 112 by a locking member 133; a strip groove 511 is provided on the shoulder positioning seat 51 facing away from the head and neck pad 11;

[0070] The shoulder pressure rod 53 is fixed in the strip groove 511 by cooperating with the mounting hole 1121 in the strip groove 511 through the locking piece 133; a sliding groove 531 is opened on the shoulder pressure rod 53, and the slider 52 is fixed to the shoulder pressure rod 53 by using the locking piece 133 passing through the sliding groove 531; the block 132 at the edge of the shoulder thermoplastic film 4 (the structure of the block 132 here is the same as that of the block 132 at the locking mechanism 13, but the length is slightly longer) is installed in the sliding groove 531 to fix the shoulder thermoplastic film 4 on the shoulder positioning mechanism 5.

[0071] The shoulder positioning mechanism 5 positions the patient's shoulder in the following process: first, the position (mounting hole 1121) of the shoulder positioning seat 51 installed on the arc-shaped enclosure 112 is adjusted according to the width of the patient's shoulder, and the position of the shoulder pressure rod 53 in the strip groove 511 is adjusted so that the shoulder pressure rod 53 contacts the patient's shoulder. Then, the shoulder thermoplastic film 4 is scalded with hot water and covered on the shoulder. The shoulder thermoplastic film 4 is pulled to make it completely contact with the patient. Then, the block 132 at the edge of the shoulder thermoplastic film 4 is installed on the sliding groove 531, and the slider 52 is moved to make it contact with the end of the shoulder thermoplastic film 4. Then, the slider 52 is fixed with the locking member 133 to achieve the positioning of the patient's shoulder. If there is a scale line, it is also necessary to record the positions of the shoulder positioning seat 51 and the shoulder pressure rod 53 according to the scale line.

[0072] As can be seen from the above, when the shoulder positioning mechanism 5 is used for positioning, the shoulder positioning seat 51 can be moved to an appropriate position relative to the arc-shaped enclosure 112 for fixation, and the shoulder pressure rod 53 can be moved up and down relative to the shoulder positioning seat 51 to adapt to different fat and thin people; the slider 52 can move in the sliding groove 531, which can limit the block 132 of the fixed shoulder thermoplastic film 4 here to move back and forth in the sliding groove 531 to achieve the patient's shoulder positioning.

[0073] Wherever the mounting holes 1121 appear in the present solution, a plurality of interconnected mounting holes 1121 are used. This makes it easy to adjust the mounting holes 1121 according to the height, weight and size of the patient to stably fix the patient, so as to achieve movement according to the specific situation of the patient. All locking members 133 mentioned in the present solution are screw / bolt and nut matching structures.

[0074] Among them, scale lines are set at the mounting hole 1121 of the arc-shaped enclosure 112 and on the shoulder pressure rod 53; the setting of the scale lines here can conveniently record the displacement of the shoulder positioning seat 51 and the shoulder pressure rod 53 during CT positioning of the patient, so that during magnetic resonance imaging and repositioning radiotherapy, accurate positioning can be quickly achieved based on the data recorded during CT image scanning.

[0075] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the head and neck fixation device of the CT simulation room also includes a nose pressing mechanism 6 for pressing the patient's nose; the nose pressing mechanism 6 includes a nose pressing suspension beam 61, a nose pressing longitudinal beam 62 and an arched frame 63 installed on the fixing block 131 of two locking mechanisms 13 adjacent to the shoulder pad 12.

[0076] A transverse groove 631 is provided at the top of the arch frame 63, and a nose pressing suspension beam 61 is installed in the transverse groove 631 through a locking piece 133; a longitudinal groove 611 is provided on the nose pressing suspension beam 61, and a vertical groove 621 is provided on the nose pressing longitudinal beam 62. At least one nose pressing longitudinal beam 62 is fixed to the nose pressing suspension beam 61 through a locking piece 133 passing through the longitudinal groove 611 and the vertical groove 621; the lower surface of the nose pressing longitudinal beam 62 has an arc surface 622 that fits the nose.

[0077] Among them, the openings of the horizontal slide groove 631, the vertical slide groove 621 and the longitudinal slide groove 611 are all provided with scale lines for recording the moving length of the internal components. The scale lines here are mainly used for rapid resetting according to the recorded data during radiotherapy of the patient.

[0078] The positioning process of the nose pressing mechanism 6 is as follows: after the head and neck thermoplastic film 2 is completely covered on the patient's head and neck and fixed on the corresponding locking mechanism 13, the position of the nose pressing suspension beam 61 in the horizontal slide groove 631 is adjusted according to the patient's facial contour, so that the nose pressing suspension beam 61 is located directly above the patient's nose; then the position of the nose pressing longitudinal beam 62 in the longitudinal slide groove 611 and the length of the nose pressing suspension beam 61 extended by the vertical slide groove 621 are adjusted, so that the arc surface 622 of the nose pressing longitudinal beam 62 contacts the patient's nose, and then the movement displacement of the nose pressing suspension beam 61 and the nose pressing longitudinal beam 62 is recorded by the set scale lines, wherein the displacement of the nose pressing longitudinal beam 62 needs to record the displacement in two directions.

[0079] like Figure 5 As shown, the nose pressing longitudinal beam 62 includes a nose pressing mounting beam 625, a vertical slide groove 621 is provided on the nose pressing mounting beam 625, a nose pressing clamping block 624 is clamped at the lower end of the nose pressing mounting beam 625, a nose pressing pad 623 is clamped at the lower end of the nose pressing clamping block 624, the nose pressing pad 623 is made of a flexible material, and the arc surface 622 constitutes the lower surface of the nose pressing pad 623. The structural components of the nose pressing longitudinal beam 62 can be assembled by interference fit.

[0080] In order to reduce artifacts during image scanning, except for the head and neck thermoplastic film 2, the shoulder thermoplastic film 4 and the nose pressure pad 623, the other parts of the fixing device of this solution can be made of carbon fiber.

Claims

1. CT simulation room head and neck fixation device, characterized in that: Including head, neck and shoulder pads and head and neck fixing parts, The head and neck fixing part comprises a head and neck thermoplastic film and a plurality of clamping blocks fixed on the edge of the head and neck thermoplastic film; The head, neck and shoulder pad comprises a head and neck pad and a shoulder pad connected to the head and neck pad as a whole; the inner contours of the head and neck pad and the shoulder pad are the same as the inner contours of the head and neck pad and the shoulder pad of the magnetic resonance head and neck fixation device; The head and neck pad includes an arc-shaped accommodation plate having an arc-shaped accommodation cavity for accommodating the patient's head and neck, and an arc-shaped enclosure plate connected to the edge of the top wall of the arc-shaped accommodation plate and extending downward to enclose the arc-shaped accommodation plate; the height of the arc-shaped enclosure plate is greater than or equal to the height of the arc-shaped accommodation plate and is equal to the height of the shoulder pad; The top surface of the arc-shaped accommodation plate and the locking portion of the magnetic resonance head and neck fixing device are both provided with locking mechanisms that cooperate with the clamping blocks at the edge of the head and neck thermoplastic film; The shoulder pad is an arc-shaped plate with a receiving groove for receiving the patient's shoulders; a shoulder pressing mechanism for pressing the patient's shoulders is installed on the arc-shaped receiving plate and the arc-shaped surrounding plate at the connection with the shoulder pad; The head and neck fixing device for the CT simulation room also includes a shoulder fixing part, which includes a shoulder thermoplastic film and a plurality of clamping blocks fixed to the shoulder thermoplastic film; the clamping blocks of the shoulder fixing part are installed on the arc-shaped receiving plate and the arc-shaped enclosing plate at the connection with the shoulder pad through a shoulder positioning mechanism, and can move along the length direction of the shoulder pad; The shoulder positioning mechanism comprises a shoulder positioning seat, a slider and a shoulder pressure rod. The shoulder positioning seat is locked in the mounting hole on the arc-shaped enclosure plate by a locking member. A strip groove is provided on the side of the shoulder positioning seat facing away from the head and neck pad. The shoulder pressure rod is fixed in the strip groove by matching the locking piece with the mounting hole in the strip groove; a sliding groove is provided on the shoulder pressure rod, and the slider is fixed on the shoulder pressure rod by using a locking piece passing through the sliding groove; the clamping block at the edge of the shoulder thermoplastic film is installed in the sliding groove to fix the shoulder thermoplastic film on the shoulder positioning mechanism; The shoulder pressing mechanism comprises an arc-shaped shoulder pressing block and a shoulder pressing base fixed on the arc-shaped enclosure plate and movable along the length direction of the arc-shaped enclosure plate, the arc-shaped shoulder pressing block is provided with a slide groove for adjusting the distance between the top surface of the arc-shaped shoulder pressing block and the arc-shaped receiving plate, and the arc-shaped shoulder pressing block is fixed to the shoulder pressing base by a locking piece passing through the slide groove; The shoulder positioning mechanism and the shoulder pressing mechanism are installed at the same position. When pressing the patient's shoulder, one of the shoulder positioning mechanism and the shoulder pressing mechanism is selected; the shoulder pressing mechanism is used to confirm the positioning of the patient's lesion in the head and neck; the shoulder thermoplastic film and the shoulder positioning mechanism cooperate with each other to detect the presence of lesions on the shoulder.

2. The head and neck fixation device for a CT simulation room according to claim 1, characterized in that: The locking mechanism comprises a fixing block, which is locked on the top surface of the arc-shaped receiving plate by a locking member; a strip groove for clamping the clamping block is provided on the fixing block extending above the receiving cavity; The clamping block is L-shaped, one end of which is hooked in the strip groove, and the other end is provided with a clamping groove, and the edge of the head and neck thermoplastic film is clamped in the clamping groove.

3. The head and neck fixation device for a CT simulation room according to claim 1, characterized in that: The arc-shaped enclosure plate and the arc-shaped receiving plate are both provided with a plurality of mounting holes which are interconnected. The shoulder pressing base is installed in the mounting hole of the arc-shaped enclosure plate through a locking piece, and the lower end of the arc-shaped shoulder pressing block passes through the mounting hole on the arc-shaped receiving plate.

4. The head and neck fixation device for a CT simulation room according to claim 1 or 3, characterized in that: Scale lines are arranged on the arc-shaped shoulder pressing block and at the mounting holes of the arc-shaped enclosure plate.

5. The head and neck fixation device for a CT simulation room according to claim 1, characterized in that: Scale lines are arranged on the mounting hole of the arc-shaped enclosure plate and on the shoulder pressure rod.

6. The head and neck fixation device for a CT simulation room according to claim 1, characterized in that: Also included is a nose pressing mechanism for pressing the patient's nose; the nose pressing mechanism includes a nose pressing suspension beam, a nose pressing longitudinal beam, and an arched frame installed on two fixing blocks of the locking mechanism adjacent to the shoulder pad; A transverse slide groove is provided at the top of the arch frame, and a nose pressing suspension beam is installed in the transverse slide groove through a locking piece; a longitudinal slide groove is provided on the nose pressing suspension beam, and a vertical slide groove is provided on the nose pressing longitudinal beam, and at least one nose pressing longitudinal beam is fixed on the nose pressing suspension beam through a locking piece passing through the longitudinal slide groove and the vertical slide groove; the lower surface of the nose pressing longitudinal beam has an arc surface that fits the nose.

7. The head and neck fixation device for a CT simulation room according to claim 1, characterized in that: The head, neck and shoulder pad is provided with a plurality of through holes for reducing artifacts.

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