Perineum brachytherapy positioning frame

Abstract

The present invention relates to a perineum brachytherapy positioning frame, comprising a body positioning board and an applicator fixing frame, wherein a left leg bottom plate and a left telescopic plate are provided on the left side of the body positioning board, the left telescopic plate slides along the left leg bottom plate, a right leg bottom plate and a right telescopic plate are provided on the right side of the body positioning board, the right telescopic plate slides along the right leg bottom plate, the left leg bottom plate and the right leg bottom plate are respectively hinged to the body positioning board, and the two sides of the applicator fixing frame are respectively connected to the left telescopic plate and the right telescopic plate. The beneficial effects of the present invention are as follows: the hinged structure of the body positioning board and the left and right leg plates can facilitate the operation of approaching the perineum, the applicator fixing frame is installed in a movable manner, the applicator fixing frame can fix the applicator after the applicator is placed, avoiding the influence of the applicator fixing frame on the placement operation, the applicator fixing frame can move and adjust the position on the leg plates on both sides, and is fixedly connected to the body positioning board and the leg plates on both sides as a whole, which can significantly improve the individualized fixation effect of different types of applicators.

Description

Technical Field

[0001] The invention belongs to radiotherapy equipment, and in particular relates to a perineum close-range radiotherapy positioning frame. Background Art

[0002] Perineal brachytherapy is an indispensable part of radical radiotherapy for gynecological malignancies, and is also applicable to implant radiotherapy for male prostate cancer. Three-dimensional precision brachytherapy is the future development trend. More and more hospitals in my country have adopted three-dimensional brachytherapy equipment, but there are few supporting peripheral products. Through the study of intra-fraction changes in three-dimensional brachytherapy for cervical cancer, it was found that the fixation of the applicator is closely related to its changes, which in turn affects the accuracy of radiotherapy irradiation and the dose of adjacent normal organs such as the bladder and rectum. During the applicator placement operation, the doctor needs to operate at a position close to the perineum. The current brachytherapy fixed positioning frame is mostly integrated with the transfer bed, and the fixed positioning frame is immovable, which affects the doctor's operation of inserting the applicator. Performing the placement operation on the transfer bed is also not conducive to observation and surgical operation. The corresponding method currently used is to first insert the applicator on the gynecological examination bed, and then move the patient to the transfer bed board for fixation through the fixed positioning frame. During the patient's bed transfer, there is a risk of applicator displacement and rotation. In addition, the transfer bed uses an integral medical CT positioning carbon fiber plate, which has a high manufacturing cost and is not conducive to the promotion and development of radiotherapy precision technology. Summary of the invention

[0003] The purpose of the present invention is to provide a technical solution for a perineum brachytherapy positioning frame, and to improve the convenience of the source applicator implantation operation and the fixation effect of the source applicator.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a perineum brachytherapy positioning frame, comprising a body positioning board (10) and an applicator fixing frame (20), wherein a left leg bottom plate (31) and a left telescopic plate (32) are provided on the left side of the body positioning board, and the left telescopic plate slides along the left leg bottom plate; a right leg bottom plate (41) and a right telescopic plate (42) are provided on the right side of the body positioning board, and the right telescopic plate slides along the right leg bottom plate; the left leg bottom plate and the right leg bottom plate are respectively hinged to the body positioning board; and the two sides of the applicator fixing frame are respectively connected to the left telescopic plate and the right telescopic plate.

[0005] Furthermore, in order to avoid wasting precious materials and facilitate assembly, the body positioning board is a medical CT positioning carbon fiber board that does not exceed the waist of the human body. The left side of the body positioning board is provided with a left leg board slot (11) and a left leg board mounting hole (12), the left leg bottom plate is provided with a left mounting slot (33), the bottom surface of the left mounting slot is provided with a left leg board mounting shaft (34), and the left leg bottom plate is mounted below the left leg board slot of the body positioning board through the left leg board mounting shaft; the right side of the body positioning board is provided with a right leg board slot (13) and a right leg board mounting hole (14), the right leg bottom plate is provided with a right mounting slot (43), the bottom surface of the right mounting slot is provided with a right leg board mounting shaft (44), and the right leg bottom plate is mounted below the right leg board slot of the body positioning board through the right leg board mounting shaft.

[0006] Furthermore, a preferred telescopic plate structure is that the left telescopic plate is provided with a left telescopic plate slide groove (35), the left telescopic plate slide groove is nested in the left leg bottom plate and slides, the upper ends of the two sides of the left leg bottom plate are provided with protruding left leg plate guide rails (36), the inner edge of the left telescopic plate slide groove is provided with a left telescopic plate guide groove (37) that is slidably matched with the left leg plate guide rail (36a), and the outer edge of the left telescopic plate is provided with a fixing screw (38), the fixing screw presses the outer edge of the left leg bottom plate and clamps the left leg bottom plate. The left leg board guide rail (36b) is on the outer side of the leg bottom plate; the right telescopic plate is provided with a right telescopic plate slide groove (45), the right telescopic plate slide groove is nested in the right leg bottom plate and slides, the upper ends of the two side edges of the right leg bottom plate are provided with protruding right leg board guide rails, the inner edge of the right telescopic plate slide groove is provided with a right telescopic plate guide groove that slides with the right leg board slide rail, and the outer edge of the right telescopic plate is provided with a fixing screw, the fixing screw presses the outer edge of the right leg bottom plate and clamps the right leg board guide rail on the outer side of the right leg bottom plate.

[0007] Furthermore, in order to facilitate the installation and adjustment of the source applicator fixing frame, connecting slide rails (21) are respectively provided on both sides of the source applicator fixing frame, the inner side of the left telescopic plate is provided with a left fixed frame slide groove (39) corresponding to the connecting slide rail, and the inner side of the right telescopic plate is provided with a right fixed frame slide groove (49) corresponding to the connecting slide rail, and the connecting slide rails of the source applicator fixing frame are respectively embedded in the left fixed frame slide groove and the right fixed frame slide groove, and move along the left fixed frame slide groove and the right fixed frame slide groove.

[0008] Furthermore, in order to facilitate the fixation of the source applicator fixing frame, the left fixing frame slide groove and the right fixing frame slide groove are T-shaped grooves, the source applicator fixing frame is provided with a fixing arm (22), the fixing arm is provided with a bolt groove (23) with an open end, and the left fixing frame slide groove and the right fixing frame slide groove are provided with T-shaped bolts (24), and the T-shaped bolts pass through the bolt grooves of the fixing arms to fix the source applicator fixing frame to the left telescopic plate and the right telescopic plate.

[0009] Furthermore, in order to enable the source applicator fixing frame to connect the rotatable and unfolded left telescopic plate and right telescopic plate, the source applicator fixing frame is provided with a first adjustment plate (25), a second adjustment plate (26) and a source applicator column (27), the two ends of the first adjustment plate and the second adjustment plate are respectively connected to the left telescopic plate and the right telescopic plate, the first adjustment plate is provided with an adjustment long hole (28), the second adjustment plate is provided with an adjustment fixing screw hole (29), and the lower end of the source applicator column is provided with a locking stud (2a) and a step surface (2b) corresponding to the adjustment fixing screw hole, and the step surface fixes the first adjustment plate and the second adjustment plate through the locking stud.

[0010] Furthermore, in order to improve the convenience of adjusting the source applicator fixing frame, the second adjustment plate is provided with a screw hole column head (2c), the adjustment fixing screw hole is arranged in the screw hole column head, the screw hole column head is embedded in the adjustment long hole of the first adjustment plate and slides in the adjustment long hole, and the height (H) of the screw hole column head is less than the thickness (S) of the second adjustment plate at the adjustment long hole.

[0011] Furthermore, in order to support the bending of the legs, the left leg bottom plate and the left telescopic plate are provided with a left thigh support plate (51), a left calf support plate (52) and a left foot plate (53); the left thigh support plate is rotatably connected to the left leg bottom plate at the root of the left leg bottom plate, the left thigh support plate is hinged to the left calf support plate, the left calf support plate is rotatably connected to the left telescopic plate, and the left calf support plate is hinged to the left foot plate; the right leg bottom plate and the right telescopic plate are provided with a right thigh support plate (61), a right calf support plate (62) and a right foot plate (63); the right thigh support plate is rotatably connected to the right leg bottom plate at the root of the right leg bottom plate, the right thigh support plate is hinged to the right calf support plate, the right calf support plate is rotatably connected to the right telescopic plate, and the right calf support plate is hinged to the right foot plate.

[0012] Furthermore, the left thigh support plate is hinged to the left leg bottom plate via a pin (54), and the left calf support plate is hinged to the left telescopic plate; the right thigh support plate is hinged to the right leg bottom plate via a pin (64), and the right calf support plate is rotatably connected to the right telescopic plate.

[0013] Furthermore, to facilitate disassembly and installation, a left leg plate support groove (3a) is provided at the root of the left leg bottom plate, the end of the left thigh support plate is pressed on the left leg plate support groove, a left support wedge groove (3b) is provided in the middle of the left leg plate support groove, a left thigh support plate wedge block (55) is provided at the end of the left thigh support plate and is embedded in the left support wedge groove, the left telescopic plate is provided with a left telescopic plate support groove (3f), the end of the left calf support plate is pressed on the left telescopic plate support groove, a left telescopic support wedge groove (3g) is provided in the middle of the left telescopic plate support groove, and the end of the left calf support plate is provided with a left telescopic support wedge groove (56) embedded in the left telescopic support wedge groove a calf support plate wedge block (59); a right leg plate support stop groove (4a) is provided at the root of the right leg bottom plate, the end of the right thigh support plate is pressed against the right leg plate support stop groove, a right support wedge groove (4b) is provided in the middle of the right leg plate support stop groove, and a right thigh support plate wedge block (65) is provided at the end of the right thigh support plate and is embedded in the right support wedge groove; the right telescopic plate is provided with a right telescopic plate support stop groove (4f), the end of the right calf support plate is pressed against the right telescopic plate support stop groove, a right telescopic support wedge groove is provided in the middle of the right telescopic plate support stop groove, and a right calf support plate wedge block is provided at the end of the right calf support plate and is embedded in the right telescopic support wedge groove.

[0014] The beneficial effects of the present invention are as follows: the hinged structure of the body position board and the left and right leg boards can facilitate the operation of approaching the perineum, the source applicator fixing frame is installed in a movable manner, and the source applicator fixing frame can fix the source applicator after the source applicator is inserted, avoiding the influence of the source applicator fixing frame on the insertion operation, and the source applicator fixing frame can be moved on the leg boards on both sides to adjust the position, and is fixedly connected with the body position board and the leg boards on both sides as a whole, which can significantly improve the individualized fixation effect of different types of source applicators, and is compatible with various simulation positioning machine tools, CT beds, flat cars, nursing beds, and diagnostic beds; the source applicator fixing frame using two adjustment plates can adjust the fixing angles of the leg boards on both sides, which can improve the stability of the patient's body position. Only the body position board uses a medical CT positioning carbon fiber plate, which saves the consumption of precious materials and reduces the manufacturing cost.

[0015] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present invention, with the knee-flexion support frame in a flat position;

[0017] Figure 2 yes Figure 1 The B-direction view is the view from the bottom surface;

[0018] Figure 3 It is a structural exploded view of the present invention;

[0019] Figure 4 yes Figure 1 The AA section view is a section view of the left leg bottom plate and the left telescopic plate, and a connection structure diagram of the left telescopic plate and the source applicator fixing frame;

[0020] Figure 5 It is a structural exploded view of the left leg bottom plate and the left telescopic plate of the present invention;

[0021] Figure 6 This is a structural diagram of a detachable knee flexion support frame used in the present invention;

[0022] Figure 7 is a disassembly schematic diagram of a detachable knee flexion support frame structure of the present invention;

[0023] Figure 8 It is a structural diagram of the source applicator fixing frame of the present invention with adjustable telescopic amount and angle;

[0024] Fig. 9 yes Figure 8 An exploded view of the structure shown;

[0025] Fig.10 yes Figure 8 Partial cross-section of CC. DETAILED DESCRIPTION

[0026] Embodiment 1:

[0027] like Figures 1 to 5 , a perineum brachytherapy positioning frame, comprising a body positioning plate (10) and an applicator fixing frame (20).

[0028] In order to avoid affecting the CT image during the treatment process, the body positioning board (10) is made of a medical CT positioning carbon fiber board. In order to reduce the use of expensive medical CT positioning carbon fiber boards, the size of the body positioning board does not exceed the human waist, and is from the human waist to the thigh root. In order to alleviate the discomfort caused by the body positioning board to the patient's waist, the body positioning board is provided with a convex surface (15) on the side corresponding to the human waist. The left side of the body positioning board is provided with a left leg board groove (11), the left leg board groove is recessed into the lower end surface of the body positioning board, and a left leg board mounting hole (12) is provided on the groove surface of the left leg board groove. As a symmetrical structure, the right side of the body positioning board is provided with a right leg board groove (13), the right leg board groove is recessed into the lower end surface of the body positioning board, and a right leg board mounting hole (14) is provided on the groove surface of the right leg board groove.

[0029] A left leg bottom plate (31) and a left telescopic plate (32) are provided on the left side of the body positioning plate. The left leg bottom plate is provided with a left mounting groove (33), which is recessed into the upper end surface of the left leg bottom plate. The bottom surface of the left mounting groove is provided with a left leg plate mounting shaft (34). The upper ends of both sides of the left leg bottom plate are provided with protruding left leg plate guide rails (36). In this embodiment, the left leg plate guide rails are rectangular guide rails. A support plate connecting hole (3c) is provided at the root of the left leg bottom plate (i.e., the end close to the left leg plate mounting shaft 34).

[0030] The left telescopic plate is provided with a left telescopic plate slide groove (35), which is nested in the left leg bottom plate and slides. The inner side edge of the left telescopic plate slide groove (i.e., the side close to the source applicator fixing frame) is provided with a left telescopic plate guide groove (37), and the left telescopic plate guide groove (37) is connected to the left leg plate guide rail (such as Figure 4 , the left leg plate guide rail 36a) close to the source applicator fixing frame is slidably matched, and the outer edge of the left telescopic plate is provided with four set screws (38), which press the outer edge of the left leg bottom plate and clamp the left leg plate guide rail (such as Figure 4 , 36b), so that the left telescopic plate is fixedly connected to the left leg bottom plate. The inner side of the left telescopic plate is provided with a left fixing frame slide groove (39), and the left fixing frame slide groove is a T-shaped groove. The extended end of the left telescopic plate is provided with a foot plate mounting shaft hole (3d) and a foot plate fixing arc groove (3e).

[0031] As a symmetrical structure, a right leg bottom plate (41) and a right telescopic plate (42) are provided on the right side of the body position plate. The right leg bottom plate is provided with a right mounting groove (43), the right mounting groove is recessed into the upper end surface of the right leg bottom plate, the bottom surface of the right mounting groove is provided with a right leg plate mounting shaft (44), the upper ends of both sides of the right leg bottom plate are provided with protruding right leg plate guide rails (not marked in the figure), and the root of the right leg bottom plate (i.e., the end close to the right leg plate mounting shaft 44) is provided with a support plate connection hole.

[0032] The right telescopic plate is provided with a right telescopic plate slide (45), which is nested in the right leg bottom plate and slides. The inner edge of the right telescopic plate slide is provided with a right telescopic plate guide groove (not shown in the figure) that is slidably matched with the right leg plate slide rail. The outer edge of the right telescopic plate is provided with four set screws, which press against the outer edge of the right leg bottom plate and clamp the right leg plate guide rail on the outer side of the right leg bottom plate, so that the right telescopic plate is fixedly connected to the right leg bottom plate. The inner side of the right telescopic plate is provided with a right fixing frame slide groove (49), which is a T-shaped groove. The extended end of the right telescopic plate is provided with a foot plate mounting shaft hole and a foot plate fixing arc groove.

[0033] The left leg plate mounting shaft (34) is rotatably matched with the left leg plate mounting hole (12) of the body positioning board, and the left leg bottom plate is mounted below the left leg plate slot (11) of the body positioning board. The right leg plate mounting shaft (44) is rotatably matched with the right leg plate mounting hole (14) of the body positioning board, and the right leg bottom plate is mounted below the right leg plate slot (13) of the body positioning board. The left leg bottom plate and the right leg bottom plate can be rotatably adjusted on both sides of the body positioning board to adapt to the position of the patient's legs being opened. The left telescopic plate slides along the left leg bottom plate, and the right telescopic plate slides along the right leg bottom plate, which can adapt to the patient's leg extension position. This mounting structure of the left leg bottom plate and the right leg bottom plate can be easily installed and disassembled.

[0034] Connecting slide rails (21) are provided on both sides of the source applicator fixing frame. The connecting slide rail on one side corresponds to the left fixing frame slide groove (39), and the connecting slide rail on the other side corresponds to the right fixing frame slide groove (49). The connecting slide rails (21) on both sides of the source applicator fixing frame are respectively embedded in the left fixing frame slide groove (39) and the right fixing frame slide groove (49), and the source applicator is fixed and moves along the left fixing frame slide groove and the right fixing frame slide groove. The four corners of the source applicator fixing frame are respectively provided with fixed arms (22), and the fixed arms are provided with bolt grooves (23) with open ends. The left fixing frame slide groove (39) and the right fixing frame slide groove (49) are provided with T-bolts (24). The T-bolts pass through the bolt grooves (23) of the fixed arms to fix the source applicator fixing frame to the left telescopic plate and the right telescopic plate. In this embodiment, when the source applicator fixing frame is connected to the left telescopic plate and the right telescopic plate, the left fixing frame slide groove (39) and the right fixing frame slide groove (49) are in parallel positions to each other, that is, the left telescopic plate and the right telescopic plate are in a state of being parallel to each other. As Figure 2 As shown, the bottom surfaces of the body positioning plate (10), the left leg bottom plate (31), the left telescopic plate (32), the right leg bottom plate (41), the right telescopic plate (42) and the source applicator fixing frame (20) are flush with each other to form a plane, so as to be placed on the bed surface of the simulation positioning machine tool lamp device.

[0035] In order to support the patient's legs in a bent state and make the patient feel more comfortable, a knee flexion support frame is provided on the left and right sides. The structure is that a left thigh support plate (51), a left calf support plate (52) and a left foot plate (53) are provided on the left leg bottom plate and the left telescopic plate. The left thigh support plate is rotatably connected to the left leg bottom plate at the root of the left leg bottom plate. In this embodiment, a connection hole (56) is provided at one end of the left thigh support plate, and the left thigh support plate is hinged to the support plate connection hole (3c) of the left leg bottom plate through a pin shaft (54). The other end of the left thigh support plate is hinged to the left calf support plate (52), and the left calf support plate and the left foot plate are hinged to the foot plate mounting shaft hole (3d) of the left telescopic plate through a pin shaft (57). The left foot plate (53) can be rotated to adjust the angle, and the left foot plate is fixed at the rotation angle position through a foot plate fixing screw 58 and a foot plate fixing arc groove (3e). Also as a symmetrical structure, a right thigh support plate (61), a right calf support plate (62) and a right foot plate (63) are provided on the right leg bottom plate and the right telescopic plate, one end of the right thigh support plate is hinged to the right leg bottom plate at the root of the right leg bottom plate through a pin (64), the other end of the right thigh support plate is hinged to the right calf support plate (62), and the right calf support plate and the right left foot plate are hinged to the right telescopic plate.

[0036] The double-bending support structure forms a triangular support frame, which can adjust the bending and support height of the knee joint as the left telescopic plate or the right telescopic plate moves.

[0037] When the perineum brachytherapy positioning frame of this embodiment is used, it is placed on a simulation positioning machine, CT bed, flatbed, nursing bed or examination bed, with the body positioning board close to the edge of the bed, the left leg bottom plate (and the left telescopic plate) and the right leg bottom plate (and the right telescopic plate) appropriately extending out of the edge of the bed and appropriately rotating and unfolding to both sides, and the knee-flexion support frame is adjusted, and the patient's legs are appropriately bent, so that the doctor can operate close to the patient's perineum and insert the radiotherapy source. After the radiotherapy source is inserted, the knee-flexion support frame is laid flat to an appropriate position (for example, Figure 1 The left leg bottom plate and the right leg bottom plate are then retracted inward to the position connected to the source applicator fixing frame, and connected to the source applicator fixing frame. The source applicator fixing frame can be adjusted forward and backward along the left telescopic plate and the right telescopic plate to an appropriate position, and then the connection between the source applicator fixing frame and the left telescopic plate and the right telescopic plate is fixed. Finally, the perineum brachytherapy positioning frame and the patient are moved as a whole to the required treatment and detection position.

[0038] Embodiment 2:

[0039] like Figure 6 , Figure 7 , a perineum brachytherapy positioning frame. This embodiment is an improvement of the first embodiment.

[0040] This embodiment improves the installation structure of the knee flexion support frame.

[0041] The root of the left leg bottom plate is provided with a left leg plate support retaining groove (3a), and the left leg plate support retaining groove is an arc groove. The end (58) of the left thigh support plate is an arc end corresponding to the left leg plate support retaining groove (3a), and the end (58) of the left thigh support plate is pressed on the left leg plate support retaining groove (3a). The left leg plate support retaining groove (3a) supports the left thigh support plate, and the end (58) of the left thigh support plate can rotate on the left leg plate support retaining groove (3a), realizing the function of rotational connection. In order to prevent the left thigh support plate from slipping out of the left leg plate support retaining groove (3a) from the side, the left leg bottom plate is provided with a left support wedge groove (3b) in the middle of the left leg plate support retaining groove, and the end of the left thigh support plate is provided with a left thigh support plate wedge block (55) embedded in the left support wedge groove (3b).

[0042] The left telescopic plate is provided with a left telescopic plate support retaining groove (3f), which is an arc-shaped groove. The end of the left calf support plate is an arc-shaped end corresponding to the left telescopic plate support retaining groove (3f), and the end of the left calf support plate is pressed on the left telescopic plate support retaining groove. The left telescopic plate support retaining groove supports the left calf support plate, and the end of the left calf support plate can rotate on the left telescopic plate support retaining groove, thereby realizing the function of rotational connection. In order to prevent the left calf support plate from slipping out of the left telescopic plate support retaining groove (3f) from the side, a left telescopic support wedge groove (3g) is provided in the middle of the left telescopic plate support retaining groove, and the end of the left calf support plate is provided with a left calf support plate wedge block (59) embedded in the left telescopic support wedge groove. In addition, in order to support and adjust the left footboard, a footboard support column (5a) is provided on the left calf support wedge, and the footboard support column is provided with a footboard adjustment bolt (5b), the footboard adjustment bolt is pressed against the seat footboard from the bottom, and the length of the footboard adjustment bolt screwed out from the footboard support column is adjusted to adjust the take-off and lowering angle of the left footboard.

[0043] Similarly, as a symmetrical structure, the right leg bottom plate is provided with a right leg plate support retaining groove (4a) at the root, the end of the right thigh support plate is pressed on the right leg plate support retaining groove (4a), the right leg bottom plate is provided with a right support wedge groove (4b) in the middle of the right leg plate support retaining groove, and the end of the right thigh support plate is provided with a right thigh support plate wedge block (65) embedded in the right support wedge groove (4b). The right telescopic plate is provided with a right telescopic plate support retaining groove (4f), the end of the right calf support plate is pressed on the right telescopic plate support retaining groove, the middle of the right telescopic plate support retaining groove is provided with a right telescopic support wedge groove, and the end of the right calf support plate is provided with a right calf support plate wedge block 69 embedded in the right telescopic support wedge groove. The right calf support plate wedge block is also provided with a foot support column and a foot adjustment bolt for supporting and adjusting the right foot plate.

[0044] In this embodiment, the knee flexion support frame can be selected as an accessory, which can be easily disassembled and installed. Figure 7 As shown, the left thigh support plate and the left calf support plate are rotated in the closing direction, and the left thigh support plate and the left calf support plate are lifted upward, and the left thigh support plate, the left calf support plate and the left foot plate can be taken out. The left thigh support plate, the left calf support plate and the left foot plate can be folded and collected for easy storage and transportation. Similarly, the right thigh support plate, the right calf support plate and the right foot plate can be taken out.

[0045] Embodiment three:

[0046] like Figure 8 , Fig. 9 , Fig.10 , a perineum brachytherapy positioning frame. This embodiment is an improvement of the first embodiment.

[0047] This embodiment improves the source applicator fixing frame and adopts a structure with adjustable telescopic amount and angle. In this embodiment, the source applicator fixing frame is provided with a first adjustment plate (25), a second adjustment plate (26) and a source applicator column (27). The first adjustment plate and the second adjustment plate are provided with connecting slide rails (21), fixing arms (22) and bolt grooves (23) respectively as those in the first embodiment at both ends. The first adjustment plate and the second adjustment plate are connected to the left telescopic plate and the right telescopic plate respectively. The first adjustment plate and the second adjustment plate are relative structural concepts. Figure 8 , Fig. 9 In the structure shown, the first adjustment plate (25) is connected to the left telescopic plate (32), and the second adjustment plate (26) is connected to the right telescopic plate (42). Similarly, the first adjustment plate (25) may be connected to the right telescopic plate (42), and the second adjustment plate (26) may be connected to the left telescopic plate (32).

[0048] The first adjustment plate is provided with an adjustment long hole (28), and the second adjustment plate is provided with a screw hole column head (2c), and an adjustment fixing screw hole (29) is provided in the screw hole column head. The screw hole column head (2c) is embedded in the adjustment long hole (28) of the first adjustment plate and slides in the adjustment long hole. In order not to hinder the fixed connection between the first adjustment plate and the second adjustment plate, the height (H) of the screw hole column head (2c) is less than the thickness (S) of the second adjustment plate at the adjustment long hole. The lower end of the source applicator column (27) is provided with a locking screw (2a) corresponding to the adjustment fixing screw hole (29) and a step surface (2b), and the diameter of the step surface is greater than the diameter of the adjustment long hole (28).

[0049] The structure of this embodiment can adjust the opening size and relative angle of the connecting slide rails of the first adjustment plate and the second adjustment plate by adjusting the long hole (28), and the step surface (2b) of the applicator column (27) fixes the first adjustment plate and the second adjustment plate through the locking stud (2a).

[0050] When installing the source applicator fixing frame, the connecting slide rails of the first adjustment plate and the second adjustment plate are docked with the left fixing frame slide groove (39) and the right fixing frame slide groove (49) respectively, and fixed by T-bolts (24). In this process, the source applicator column (27) can be removed, and the screw hole column head (2c) slides in the adjustment long hole (28) of the first adjustment plate to guide the relative position of the first adjustment plate and the second adjustment plate. When the first adjustment plate and the second adjustment plate are in place, the first adjustment plate and the second adjustment plate are fixed by the source applicator column (27), which can significantly improve the convenience of operation.

[0051] In the first embodiment, when the source applicator fixing frame is connected to the left telescopic plate and the right telescopic plate, the left telescopic plate and the right telescopic plate need to be in a state of being parallel to each other. The source applicator fixing frame of this embodiment adopts an adjustable structure, which can adapt to the left telescopic plate (together with the left leg bottom plate) and the right telescopic plate (together with the right leg bottom plate) to rotate and unfold a certain angle, which can better meet the needs of the patient and improve the positioning and fixing effect of the source applicator.

Claims

1. A perineum brachytherapy positioning frame, characterized in that: The apparatus comprises a body positioning board (10) and an applicator fixing frame (20), wherein a left leg bottom plate (31) and a left telescopic plate (32) are provided on the left side of the body positioning board, and the left telescopic plate slides along the left leg bottom plate; a right leg bottom plate (41) and a right telescopic plate (42) are provided on the right side of the body positioning board, and the right leg bottom plate slides along the right leg bottom plate; the left leg bottom plate and the right leg bottom plate are respectively hinged to the body positioning board; the left leg bottom plate and the left telescopic plate, the right leg bottom plate and the right telescopic plate can be rotated and unfolded to both sides; and the two sides of the applicator fixing frame are respectively connected to the left telescopic plate and the right telescopic plate; The two sides of the source applicator fixing frame are respectively provided with connecting slide rails (21), the inner side of the left telescopic plate is provided with a left fixing frame slide groove (39) corresponding to the connecting slide rail, and the inner side of the right telescopic plate is provided with a right fixing frame slide groove (49) corresponding to the connecting slide rail, and the connecting slide rails of the source applicator fixing frame are respectively embedded in the left fixing frame slide groove and the right fixing frame slide groove, and move along the left fixing frame slide groove and the right fixing frame slide groove; The source applicator fixing frame is provided with a first adjustment plate (25), a second adjustment plate (26) and a source applicator column (27), the two ends of the first adjustment plate and the second adjustment plate are respectively connected to the left telescopic plate and the right telescopic plate, the first adjustment plate is provided with an adjustment long hole (28), the second adjustment plate is provided with an adjustment fixing screw hole (29), the lower end of the source applicator column is provided with a locking stud (2a) and a step surface (2b) corresponding to the adjustment fixing screw hole, the step surface fixes the first adjustment plate and the second adjustment plate through the locking stud, the opening size and relative angle of the connecting slide rails of the first adjustment plate and the second adjustment plate are adjusted through the adjustment long hole (28), and the step surface (2b) of the source applicator column (27) fixes the first adjustment plate and the second adjustment plate through the locking stud (2a); The left leg bottom plate and the left telescopic plate are provided with a left thigh support plate (51), a left calf support plate (52) and a left foot plate (53); the left thigh support plate is rotatably connected to the left leg bottom plate at the root of the left leg bottom plate, the left thigh support plate is hinged to the left calf support plate, and the left calf support plate is rotatably connected to the left telescopic plate; the right leg bottom plate and the right telescopic plate are provided with a right thigh support plate (61), a right calf support plate (62) and a right foot plate (63); the right thigh support plate is rotatably connected to the right leg bottom plate at the root of the right leg bottom plate, the right thigh support plate is hinged to the right calf support plate, and the right calf support plate is rotatably connected to the right telescopic plate.

2. A perineum brachytherapy positioning frame according to claim 1, characterized in that: The body positioning board is a medical CT positioning carbon fiber board that does not exceed the waist of the human body. The left side of the body positioning board is provided with a left leg board slot (11) and a left leg board mounting hole (12), the left leg bottom plate is provided with a left mounting slot (33), the bottom surface of the left mounting slot is provided with a left leg board mounting shaft (34), and the left leg bottom plate is mounted below the left leg board slot of the body positioning board via the left leg board mounting shaft; the right side of the body positioning board is provided with a right leg board slot (13) and a right leg board mounting hole (14), the right leg bottom plate is provided with a right mounting slot (43), the bottom surface of the right mounting slot is provided with a right leg board mounting shaft (44), and the right leg bottom plate is mounted below the right leg board slot of the body positioning board via the right leg board mounting shaft.

3. A perineum brachytherapy positioning frame according to claim 1, characterized in that: The left telescopic plate is provided with a left telescopic plate slide groove (35), the left telescopic plate slide groove is nested in the left leg bottom plate and slides, the upper ends of the two sides of the left leg bottom plate are provided with protruding left leg plate guide rails (36), the inner edge of the left telescopic plate slide groove is provided with a left telescopic plate guide groove (37) that slidably cooperates with the left leg plate guide rail (36a), and the outer edge of the left telescopic plate is provided with a fixing screw (38), the fixing screw presses the outer edge of the left leg bottom plate and clamps the outer edge of the left leg bottom plate. A left leg board guide rail (36b); the right telescopic board is provided with a right telescopic board slide groove (45), the right telescopic board slide groove is nested in the right leg bottom board and slides, the upper ends of the two side edges of the right leg bottom board are provided with protruding right leg board guide rails, the inner edge of the right telescopic board slide groove is provided with a right telescopic board guide groove that slides with the right leg board slide rail, and the outer edge of the right telescopic board is provided with a fixing screw, the fixing screw presses the outer edge of the right leg bottom board and clamps the right leg board guide rail on the outer edge of the right leg bottom board.

4. A perineum brachytherapy positioning frame according to claim 1, characterized in that: The left fixing frame slide groove and the right fixing frame slide groove are T-shaped grooves, the source applicator fixing frame is provided with a fixing arm (22), the fixing arm is provided with a bolt groove (23) with an open end, and the left fixing frame slide groove and the right fixing frame slide groove are provided with T-shaped bolts (24), the T-shaped bolts pass through the bolt grooves of the fixing arms to fix the source applicator fixing frame to the left telescopic plate and the right telescopic plate.

5. The perineum brachytherapy positioning frame according to claim 1, characterized in that: The second adjustment plate is provided with a screw hole column head (2c), the adjustment fixing screw hole is arranged in the screw hole column head, the screw hole column head is embedded in the adjustment long hole of the first adjustment plate and slides in the adjustment long hole, and the height (H) of the screw hole column head is less than the thickness (S) of the second adjustment plate at the adjustment long hole.

6. A perineum brachytherapy positioning frame according to claim 1, characterized in that: The left calf support plate is hinged to the left foot plate, and the right calf support plate is hinged to the right foot plate.

7. A perineum brachytherapy positioning frame according to claim 1, characterized in that: The root of the left leg bottom plate is provided with a left leg plate support stop groove (3a), the end of the left thigh support plate is pressed against the left leg plate support stop groove, the middle of the left leg plate support stop groove is provided with a left support wedge groove (3b), the end of the left thigh support plate is provided with a left thigh support plate wedge block (55) embedded in the left support wedge groove, the left telescopic plate is provided with a left telescopic plate support stop groove (3f), the end of the left calf support plate is pressed against the left telescopic plate support stop groove, the middle of the left telescopic plate support stop groove is provided with a left telescopic support wedge groove (3g), and the end of the left calf support plate is provided with a left calf support plate wedge block (59) embedded in the left telescopic support wedge groove; A right leg plate support groove (4a) is provided at the root of the right leg bottom plate, the end of the right thigh support plate presses against the right leg plate support groove, a right support wedge groove (4b) is provided in the middle of the right leg plate support groove, and a right thigh support plate wedge block (65) is provided at the end of the right thigh support plate and is embedded in the right support wedge groove; the right telescopic plate is provided with a right telescopic plate support groove (4f), the end of the right calf support plate presses against the right telescopic plate support groove, a right telescopic support wedge groove is provided in the middle of the right telescopic plate support groove, and a right calf support plate wedge block is provided at the end of the right calf support plate and is embedded in the right telescopic support wedge groove.

Images