JP2021083491A - Body position fixing system - Google Patents

Abstract

To provide a body position fixing system configured so as to reduce radiation absorption as compared with a conventional system.SOLUTION: A conventional body position fixing system is composed by a combination of a lower side body position fixing tool, a body position fixing shell, which is an upper side body position fixing tool, and a plate for fixing the shell. In the meanwhile, a body position fixing system 10 of the present invention is composed by a combination of a lower side body position fixing tool 11 and a body position fixing shell 12. A shell fixing part 13 is disposed in the lower side body position fixing tool 11, and a plate for fixing the shell is not required. Since a plate is not used, radiation absorption can be reduced as compared with the conventional system accordingly, which allows more accurate imaging, treatment, etc. to be executed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a posture fixing system used for positioning and fixing a subject or a target site of a patient placed on a treatment table in medical practice such as image diagnosis such as CT and MRI and radiotherapy.

When performing diagnostic imaging, radiation therapy, etc., a clear image can be obtained, and a specific target part (human body target part) in the subject or patient's body is maintained so that an appropriate position is maintained during the procedure. ) Must be positioned and fixed so that it does not move from the positioned location. For this purpose, high-precision positioning and fixing such as simple and general-purpose posture fixing tools such as various cushions and pillows, posture fixing shells that can individually mold the shape of the target part of the human body, and suction-type bead bags A posture fixing system equipped with a posture fixing tool for the purpose of the above is generally used.

In recent years, with the progress of imaging devices and radiotherapy devices, more accurate positioning and fixing and position reproducibility are required in the medical field, and various posture fixing devices are used to meet the demands. .. Patent Document 1 (Japanese Unexamined Patent Publication No. 2016-43267) proposes a posture fixing shell and a posture fixing shell system for performing highly accurate positioning and fixing.

In addition to improving the body position fixation and position reproducibility, it is also required to reduce the degree of radiation absorption of various body position fixing tools used in the body position fixing system. Since these posture fixing devices are intended to fix the human body, they are inevitably placed in the vicinity of the human body. Therefore, the posture fixing device becomes a factor that hinders the passage of the radiation radiated to the area to be treated and the observation target, and attenuates the amount of the passing radiation. That is, the radiation absorption of the posture fixing tool becomes a problem. In order to perform treatment with higher accuracy, it is an important factor to reduce the radiation absorption of the posture fixing tool as much as possible, and the configuration of the posture fixing tool to realize it is required.

Japanese Unexamined Patent Publication No. 2016-43267

Here, the current posture fixing system for positioning and fixing the human body using a posture fixing shell made of a sheet or film made of a thermoplastic resin is provided with a plate for attaching the posture fixing shell in a state where the human body is positioned and fixed. ing. The plate is placed on a treatment table in CT imaging or the like, and a lower position fixing device such as a pillow or a cushion is placed on the plate. In this state, the subject is placed in a supine position, for example, and the treatment sites such as the head and chest are positioned and fixed by a position-fixing shell molded from above, and the position-fixing shell is fixed to the plate in this state. ..

In the existing posture fixing system, a plate for fixing the shell for attaching the posture fixing shell for positioning and fixing the head, chest, etc. of the human body is interposed, and the radiation absorption of the constituent members is often a problem. In order to reduce the radiation absorption of the plate, various measures have been taken, including improvements in the material and shape. However, in order to perform more accurate treatment, diagnosis, etc., it is required to further reduce the radiation absorption of the posture fixing system.

In view of these points, an object of the present invention is to provide a posture fixing system having a configuration capable of reducing radiation absorption as compared with the conventional one.

In the existing posture fixing system, the present inventor has various lower postures such as pillows, cushions, suction-type bead bags, etc. that hold the human body target part to be fixed from the opposite side with respect to the posture fixing shell. Focusing on the fixture, the plate used to fix the position fixing shell is abolished, and the above problem is solved by the position fixing system that can directly fix the position fixing shell to the lower position fixing tool. doing.

That is, the present invention relates to a position fixing system used for positioning and fixing a target part of a human body to be diagnosed, treated or examined by using radiation in a patient or a subject's body placed on a treatment table.
A lower body position fixture for holding the target part of the human body on the treatment table in a positioned state from the lower side in the vertical direction of the treatment table.
A posture fixing shell for positioning and fixing the human body target part on the treatment table from above in the vertical direction,
A shell fixing portion for fixing the position fixing shell to the lower position fixing tool,
Is equipped with
The lower body position fixing tool is provided with a holding surface on which the target part of the human body is placed in a state of being positioned in the anteroposterior direction or the width direction of the treatment table.
The body position fixing shell has a shape along the human body target part in order to fix the human body target part to the holding surface in a state of being positioned in the front-rear direction or the width direction from the upper side in the vertical direction. It is characterized by having a sheet or film made of a thermoplastic resin that can be molded as described above.

The conventional posture fixing system is composed of a combination of three members, a posture fixing shell which is an upper posture fixing tool, a lower posture fixing tool, and a plate for fixing the shell. On the other hand, the body position fixing system of the present invention is composed of a combination of two members, a body position fixing shell and a lower body position fixing tool. By arranging the shell fixing part on the lower position fixing tool, the plate for fixing the shell is not required. Since the plate is not provided, radiation absorption can be reduced by that amount, and more accurate image taking, treatment, etc. can be performed. In addition, since the number of component parts is small, the posture fixing system can be constructed at a low cost.

Here, the lower position fixture includes, for example, a head fixture for mounting a portion including the head of the human body, a head for mounting the head of the human body in the supine or prone position, and a portion including both arms. To place the body / arm fixture, the torso / waist fixture for mounting the part including the torso and waist of the human body, and the part including both knees to be able to restrain the pelvis of the human body in the supine position. There are various things such as knee fixtures. For example, as a head fixture, there are a pillow (headrest) having a curved holding surface that follows the shape of the back of the head, and a suction-type beaded bag that can be molded along the shape of the back of the head. As the torso / lumbar fixture, there is a suction-type beaded bag that can be molded according to the shape of these human body parts. As the head / arm fixture, there is a cushion having a curved holding surface for holding the head and both arms. Further, as a knee fixture, there is a cushion provided with a curved holding surface for mounting both knees.

In the present invention, the shell fixing portion can be assembled and integrated with the lower body position fixing tool. Further, the shell fixing portion can be detachably attached to the lower body position fixing tool. As a mechanism for attaching and detaching the shell fixing portion to the lower body position fixing tool, for example, a hook-and-loop fastener can be used. For example, a male side fastener is attached to the side of the lower position fixing tool, a female side surface fastener is attached to the side of the shell fixing part, and the shell fixing part is attached to the lower position fixing part with one touch. Make it removable.

Generally, the posture fixing shell includes a shell-side mounting plate attached to both side edges of the seat or film in the width direction, and a plurality of mounting holes formed in the shell-side mounting plate. In this case, the shell fixing portion is, for example, a lower mounting plate in which a plurality of engaging protrusions that can be inserted into the mounting holes are formed at positions corresponding to the mounting holes, and the engaging protrusions are inserted into the mounting holes. In this state, the structure is provided with a fastener for fastening the shell-side fixing plate to the lower mounting plate.

(A) is an explanatory view showing the body position fixing system of the first embodiment, and (b) is an explanatory view showing a removable shell fixing portion arranged on the lower body position fixing tool. (A) is an explanatory view showing the posture fixing system of the second embodiment, and (b) is an explanatory view showing a lower posture fixing tool provided with a removable shell fixing portion. (A) and (b) are explanatory views which show an index bar, and (c) and (d) are explanatory views which show the positioning part of the lower body position fixing tool using an index bar. (A) is an explanatory view showing the posture fixing system of the third embodiment, and (b) is an explanatory view showing a lower posture fixing tool provided with a removable shell fixing portion. (A) and (b) are explanatory views which show the positioning part of the lower body position fixing tool using an index bar. (A) is an explanatory view showing the posture fixing system of the fourth embodiment, and (b) is an explanatory view showing a lower posture fixing tool provided with a removable shell fixing portion. It is explanatory drawing which shows an example of the lower body position fixing tool provided with the detachable shell fixing part. It is explanatory drawing which shows an example of the lower body position fixing tool provided with the detachable shell fixing part. (A) and (b) are explanatory views which show the positioning part of the lower body position fixing tool using an index bar. It is explanatory drawing which shows an example of the lower body position fixing tool provided with the integrated shell fixing part. (A) is an explanatory view showing an example of a lower body position fixing tool provided with an integrated shell fixing portion, and (b) is an explanatory view showing the shell fixing portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments show an example of the present invention and are not intended to limit the present invention to embodiments.

[Embodiment 1: Position fixing system for fixing the torso / lumbar region]
FIG. 1A is an explanatory view showing a posture fixing system according to the first embodiment, and FIG. 1B is an explanatory view showing a shell fixing portion thereof. The body position fixing system 10 is positioned and fixed to the top surface 1a of the treatment table 1 for radiotherapy, imaging, etc. by a positioning portion composed of an index bar (see the second embodiment described later), double-sided tape, and the like. It is composed of a combination of a lower body position fixing tool 11, a body position fixing shell 12 which is an upper body position fixing tool, and a removable shell fixing portion 13 attached to the lower body position fixing tool 11.

The lower body position fixture 11 is a state in which the body (target part of the human body) including the torso and the lumbar region of the subject or patient's body (not shown) placed on the treatment table 1 in the supine position is positioned from below. It is a suction type bag that is held by. In this type of lower position fixture 11, for example, fine polystyrene beads are housed in a rectangular contoured bag 111 made of an airtight flexible plastic film, and the bag 111 has a suction port for venting air (FIG. FIG. Not shown) is attached. The lower surface 112 of the bag 111 is fixed to the top surface 1a of the treatment table 1 in a state of being positioned in the front-rear direction and the left-right direction of the treatment table 1 by a fixing means such as double-sided tape.

After placing the subject or patient on the lower body position fixture 11 in a supine position, for example, air is sucked from the suction port of the bag 111 through the suction pipe 114. As a result, the suction bag 111 is molded into a shape that conforms to the patient's body shape. By closing the suction port, the molding state is maintained, and the holding surface 113 having the molding shape along the body shape of the patient is maintained on the upper surface of the bag 111. The holding surface 113 positions the patient's body in the anterior-posterior direction (head-to-tail direction) and the width direction.

The body position fixing shell 12 has a shell main body 121 made of a net-like sheet or film made of a thermoplastic resin having a rectangular contour, and a front-rear direction (head) fixed to both side edges of the shell main body 121 in the width direction. It is provided with an elongated rectangular resin shell-side mounting plate 122 (in the tail direction). In this example, two shell-side mounting plates 122 are arranged at regular intervals in the front-rear direction at the edges on both sides of the shell body 121. Each shell-side mounting plate 122 is formed with a plurality of mounting holes 123 in a row at regular intervals in the length direction thereof, in this example, three mounting holes 123.

Here, in the bag 111 of the lower body position fixing tool 11, removable shell fixing portions 13 are attached to the side surface portions on both sides in the width direction, respectively. The shell fixing portion 13 includes two resin lower mounting plates 131 arranged at regular intervals in the front-rear direction. As can be seen from FIG. 1B, three engaging protrusions 132 are formed in a row at regular intervals in the front-rear direction on the upper half portion of the lower mounting plate 131. The engaging protrusion 132 can be inserted into the mounting hole 123 of the shell-side mounting plate 122, and is arranged so as to be at a position corresponding to each mounting hole 123. Further, a pair of fastening knobs 133 are attached to the front and rear portions of the lower half portion of the lower mounting plate 131.

A male hook-and-loop fastener (not shown) is attached to the back surface of the lower mounting plate 131. Female hook-and-loop fasteners (not shown) to which the male hook-and-loop fasteners can be attached are attached to the side surface portions on both sides of the bag 111 of the lower posture fixture 11. Therefore, the shell fixing portion 13 provided with the lower mounting plate 131 can be attached to and detached from the lower body position fixing tool 11 with one touch.

The shell body 121 of the posture fixing shell 12 made of a sheet or film made of a thermoplastic resin is heated to make it flexible. This is put on the lower body position fixing tool 11 and put on the portion including the torso and lumbar region of the patient to be brought into close contact with the patient. In this state, the shell-side mounting plates 122 on both sides of the body position fixing shell 12 are fixed to the shell fixing portions 13 on both sides of the lower body position fixing tool 11. That is, the engaging projection 132 of the lower mounting plate 131 is positioned and inserted into the mounting hole 123 of the shell-side mounting plate 122, and the shell-side mounting plate 122 is overlapped with the lower mounting plate 131. In this state, turn the front and rear fastening knobs 133. The outer peripheral surface of the knob 133 is a cam surface, and the shell side mounting plate 122 is fastened and fixed to the lower mounting plate 131 by eccentric rotation and pushing up the shell side mounting plate 122 upward.

The shell body 121 of the body position fixing shell 12 is cured in a state of being molded into a shape that conforms to the body shape of the patient. As a result, the human body target part of the patient is fixed from above and below by the lower position fixing tool 11 composed of the molded lower suction type fixing bag and the upper position fixing shell 12. In the restrained state in which the patient is positioned in this way, radiation therapy or the like is performed by placing the patient on a mobile treatment table 1 for radiation therapy.

[Embodiment 2: Positioning system for head]
FIG. 2A (a) is an explanatory view showing an example of a posture fixing system for the head, and FIG. 2A (b) is an explanatory view showing a lower posture fixing tool for the head provided with a removable shell fixing portion. Is. Explaining with reference to these figures, the body position fixing system 20 for the head of this example includes a lower body position fixing tool 21 for the head, a body position fixing shell 22 for the head, and a lower body position fixing tool. It is composed of a combination with a detachable shell fixing portion 23 attached to 21.

The lower body position fixing tool 21 for the head is a molded product made of a rectangular resin foam that is long in the front-rear direction as a whole. As can be seen from FIG. 2A (b), the lower body position fixture 21 has a convex neck holding surface 211 on which the patient's neck portion is positioned in the anteroposterior direction (head-to-tail direction) on the front end side thereof. Is formed. On the posterior side, a curved occipital region holding surface 212 for smoothly and continuously placing the patient's occipital region on the posterior end of the neck holding surface 211 is formed. Both sides of the lower body position fixing tool 21 in the width direction are side surfaces 213 and 214 extending in the vertical direction, and the bottom surface is a flat surface. A detachable shell fixing portion 23 is detachably attached to the lower end edges of the side surfaces 213 and 214, respectively.

As shown in FIG. 2A (a), the body position fixing shell 22 for the head has a shell main body 221 made of a net-like sheet or film made of a thermoplastic resin having a rectangular contour, and the width of the shell main body 221. It is provided with an elongated rectangular resin shell-side mounting plate 222 in the front-rear direction (head-to-tail direction) fixed to the edges on both sides in the direction. A plurality of mounting holes 223, in this example, three mounting holes 223 are formed in a row on the shell-side mounting plate 222 at regular intervals in the length direction thereof.

As shown in FIG. 2A (b), the shell fixing portion 23 includes a resin lower mounting plate 231 extending in the front-rear direction. On the lower mounting plate 231, for example, three engaging protrusions 232 are formed in a row at regular intervals in the front-rear direction. The engaging protrusion 232 can be inserted into the mounting hole 223 of the shell-side mounting plate 222, and is arranged so as to correspond to each mounting hole 223. Further, a pair of fastening knobs 233 are attached to the front and rear ends of the lower mounting plate 231.

A male side fastener (not shown) is attached to the back surface of the lower mounting plate 231. A female side fastener (not shown) to which a male side fastener can be attached is attached so as to extend in the front-rear direction along the lower edges of the side surfaces 213 and 214 of the lower position fastener 21 for the head. .. Therefore, the shell fixing portion 23 provided with the lower mounting plate 231 can be attached to and detached from the side surfaces 213 and 214 of the lower body position fixing tool 21 for the head with one touch.

The shell body 221 of the body position fixing shell 22 for the head made of a thermoplastic resin film is heated to make it flexible. This is put on the lower position fixing tool 21 for the head and put on the part of the patient's head to bring it into close contact. In this state, the shell-side mounting plates 222 on both sides of the body position fixing shell 22 are fixed to the shell fixing portions 23 on both sides of the lower body position fixing tool 21 for the head. That is, the engaging projection 232 of the lower mounting plate 231 is positioned and inserted into the mounting hole 223 of the shell-side mounting plate 222, and the shell-side mounting plate 222 is overlapped with the lower mounting plate 231. In this state, when the front and rear fastening knobs 233 are rotated by 180 ° from the state shown in FIG. 2A (b), as shown in FIG. 2A (a), the front and rear knobs 233 cause the shell side mounting plate 222 to move. It is fastened and fixed to the lower mounting plate 231.

The shell body 221 of the posture-fixing shell 22 is cured in a state of being molded into a shape along the patient's head. As a result, the patient is hung from the head to the neck, which is the target part of the human body, in a state of being sandwiched from above and below by the lower position fixing tool 21 for the lower head and the upper position fixing shell 22. The part is fixed.

Here, FIG. 2B shows an example of a positioning portion for positioning and fixing the lower body position fixing tool 21 for the head to the top surface of the treatment table. FIG. 2B (a) is an explanatory view on the upper surface side showing an example of an index bar which is a component component of the positioning portion, and FIG. 2B (b) is an explanatory view on the lower surface side thereof. FIG. 2B (c) is an explanatory view showing an index bar mounting portion formed on the back surface of the lower position fixing tool 21, and FIG. 2B (d) shows the lower position fixing tool on the top surface of the treatment table using the index bar. It is explanatory drawing which shows the state which 21 was positioned and fixed. In FIGS. 2B (c) and 2B (d), the shell fixing portion 23 is omitted.

Explaining with reference to these figures, the index bar 90 includes an elongated plate-shaped bar body 91 having a constant thickness. A plurality of pin mounting holes 92 are formed in the bar body 91. Of these, pins 93 for positioning the lower body position fixture are attached to the pair of left and right pin mounting holes 92. Positioning pins 94 for positioning and fixing the index bar 90 to the top surface 1a of the treatment table 1 are attached to both ends of the lower surface of the bar body 91.

Mounting grooves (not shown) on which the head of the positioning pin 94 can be mounted are formed at predetermined positions in the vertical direction on both side edges of the top surface 1a of the treatment table 1. When the heads of the pins 94 at both ends of the index bar 90 are mounted in the mounting grooves on both sides of the top plate 1a, the index is extended in the width direction at a predetermined position in the front-rear direction on the top surface 1a. The bar 90 can be positioned and fixed. A bar mounting groove 216 extending in the width direction is formed on the back surface 215 of the lower position fixing tool 21, and the head of the pin 93 can be fitted into the bottom surface of the bar mounting groove 216 at regular intervals. Two fitting holes 217 are formed. The bar mounting groove 216 on the back surface 215 of the lower position fixing tool 21 is positioned on the index bar 90 attached to the top surface 1a, and the pin 93 is fitted into the fitting hole 217. As a result, the index bar 90 fits in the bar mounting groove 216, and the lower position fixing tool 21 is positioned by the pin 93 with the back surface 215 in contact with the top surface 1a. In this way, the lower body position fixing tool 21 is attached in a state of being positioned on the top surface 1a via the index bar 90.

[Embodiment 3: Position fixing system for head]
FIG. 3A (a) is an explanatory view showing a posture fixing system for the head according to the third embodiment, and FIG. 3A (b) shows a lower posture fixing tool for the head provided with a removable shell fixing portion. It is explanatory drawing which shows. Explaining with reference to these figures, the body position fixing system 30 for the head of this example includes a lower body position fixing tool 31 for the head, a body position fixing shell 32 for the head, and a lower body position fixing tool. It is composed of a combination with a detachable shell fixing portion 33 attached to 31.

The lower body position fixture 31 for the head is a suction type bag. In this type of lower posture fixture 31, fine beads are housed in a rectangular contoured bag 311 made of an airtight flexible plastic film, and the bag 311 is attached with a suction port 312 for bleeding air. The lower surface 313 of the bag 311 is positioned and fixed to the top surface 1a of the treatment table 1 by an index bar, double-sided tape, or the like.

After placing, for example, the head of a subject or patient in a supine position on the lower body position fixture 31, air is sucked from the suction port 312 of the bag 311. As a result, the suction bag 311 is molded into a shape along the back of the patient's head. By closing the suction port 312, the molded state is maintained, and a holding surface 314 in which the shape of the back of the patient's head is molded is formed on the upper surface of the bag 311. The holding surface 314 positions the patient's head in the anterior-posterior direction (head-to-tail direction) and in the width direction. Detachable shell fixing portions 33 are attached to the edges of the lower body position fixing tool 31 on both sides in the width direction of the bag 311.

The body position fixing shell 32 for the head is fixed to the shell main body 321 made of a net-like sheet or film made of a thermoplastic resin having a rectangular contour, and to the edges on both sides of the shell main body 321 in the width direction. It is provided with a rectangular resin shell-side mounting plate 322 that is elongated in the front-rear direction (head-to-tail direction). A plurality of mounting holes 323, in this example, three mounting holes 323 are formed in a row on the shell-side mounting plate 322 at regular intervals in the length direction thereof.

The shell fixing portion 33 has the same configuration as the shell fixing portion 23 of the second embodiment described above, and includes a resin lower mounting plate 331 extending in the front-rear direction. On the lower mounting plate 331, for example, three engaging protrusions 332 are formed in a row at regular intervals in the front-rear direction. The engaging protrusion 332 can be inserted into the mounting hole 323 of the shell-side mounting plate 322, and is arranged so as to be at a position corresponding to each mounting hole 323. Further, a pair of fastening knobs 333 are attached to the front and rear ends of the lower mounting plate 331.

A male side fastener (not shown) is attached to the back surface of the lower mounting plate 331. Female side fasteners (not shown) to which the male side fasteners can be attached are attached to the edges of the lower body position fixture 31 for the head so as to extend in the front-rear direction. Therefore, the shell fixing portion 33 provided with the lower mounting plate 331 can be attached to and detached from the lower body position fixing tool 31 for the head with one touch.

Here, FIGS. 3B (a) and 3B (b) are explanatory views showing an example of a positioning unit for positioning and fixing the suction type lower body position fixing tool 31 to the top surface 1a of the treatment table 1. The positioning portion includes an index bar 90 (see FIGS. 2B (a) and 2B (b)) and an elongated plate 100 for positioning having a constant thickness. The plate 100 is formed with fitting holes 101 at both end portions into which the heads of the pins 93 of the index bar 90 can be fitted. The plate 100 is detachably fixed to the back surface of the bag by adhesive fixing, a double-sided fastener, or the like, or is integrated with the bag.

The fitting holes 101 on both sides of the plate 100 attached to the back surface of the bag 311 of the lower position fixing tool 31 are positioned with respect to the pin 93 of the index bar 90 attached to the top surface 1a in the positioned state. The pin 93 is fitted into the 111. As a result, the lower body position fixing tool 31 is positioned and fixed with respect to the top surface 1a.

[Embodiment 4: Positioning System for Head]
FIG. 4A is an explanatory view showing the posture fixing system for the head according to the fourth embodiment, and FIG. 4B shows a lower posture fixing tool for the head provided with a removable shell fixing portion. It is explanatory drawing which shows. Explaining with reference to these figures, the posture fixing system 40 for the head of this example includes a lower posture fixing tool 41 for the head, a posture fixing shell 42 for the head, and a lower posture fixing tool. It is composed of a combination with a detachable shell fixing portion 43 attached to 41.

Since the lower position fixing tool 41 for the head is a suction type bag and has the same configuration as the lower position fixing tool 31 of the third embodiment described above, detailed description thereof will be omitted. A plurality of U-shaped removable shell fixing portions 43 are provided over both side edge portions in the width direction and the front edge portion in the front-rear direction on the upper surface of the bag 411 of the lower position fixing tool 41. It is attached in a detachable state via the hook-and-loop fastener 44.

The body position fixing shell 42 for the head is a shell main body 421 made of a net-like sheet or film made of a thermoplastic resin having a rectangular contour, and both side edge portions in the width direction and the front-rear direction of the shell main body 421. It is provided with a U-shaped resin shell-side mounting plate 422 fixed over the front edge of the. The shell-side mounting plate 422 is formed with mounting holes 423 on the left and right plate portions, respectively.

The shell fixing portion 43 includes a U-shaped resin lower mounting plate 431. The lower mounting plate 431 is formed with one engaging protrusion 432 on each of the plate portions on both sides thereof. The engaging protrusion 432 can be inserted into the mounting hole 423 of the shell-side mounting plate 422, and is arranged at a position corresponding to the mounting hole 423. Further, a pair of fastening knobs 433 are attached to the front and rear ends of the plate portions on both sides of the lower mounting plate 431, respectively.

[Example of lower position fixing device for head / arm with removable shell fixing part]
FIG. 5 is an explanatory view showing an example of a lower body position fixing tool for the head and arms. The lower position fixing tool 51 for the head / arm of this example, the position fixing shell for the head / arm (not shown), and the removable shell fixing part 53 attached to the lower position fixing tool 51. Is combined to form a posture fixing system for the head and arms.

The lower body position fixture 51 is used to prevent the head and arms of a patient or subject who has been placed in a prone position in an elevated position from moving to the treatment bed in radiotherapy, CT examination, and MRI examination. A patient fixture used to rest the arm. The lower body position fixing tool 51 is used by being fixed to the treatment table by a positioning portion including an index bar, double-sided tape, and the like. The lower body position fixing tool 51 has an inverted U-shape for head positioning, which is attached to an outer peripheral side cushion 511 filled with an elastic material such as foam and a recess formed in the central portion of the outer peripheral side cushion 511. It is provided with a central cushion 512. A holding surface portion 513 for holding the patient or the frontal region including the subject's face in a buried state is formed on the upper surface portion of the central cushion 512. A curved portion 514 for holding the neck is formed in the central portion on the rear side in the anteroposterior direction of the outer peripheral side cushion 511, and curved portions 515 for holding both arms are formed on both sides thereof. There is.

The detachable shell fixing portion 53 is attached to both side surfaces of the outer peripheral side cushion 511 in the width direction so as to extend in the front-rear direction. The shell fixing portion 53 has the same configuration as the shell fixing portion 23 (FIG. 2) and the shell fixing portion 33 (FIG. 3) described above, and includes a resin lower mounting plate 531 extending in the front-rear direction. On the lower mounting plate 531 for example, three engaging projections 532 are formed in a row at regular intervals in the front-rear direction. The engaging projection 532 can be inserted into the mounting holes of the shell-side mounting plate of the posture fixing shell (not shown), and is arranged so as to correspond to each mounting hole. Further, a pair of fastening knobs 533 are attached to the front and rear ends of the lower mounting plate 531.

A male side fastener (not shown) is attached to the back surface of the lower mounting plate 531. Female side fasteners (not shown) to which the male side fasteners can be attached are attached to the edge portions on both sides of the lower body position fixing tool 51 for the head and arms so as to extend in the front-rear direction. Therefore, the shell fixing portion 53 provided with the lower mounting plate 531 can be attached to and detached from the lower body position fixing tool 51 for the head and arms with one touch.

[Example of lower position fixing device for knees with removable shell fixing part]
FIG. 6A is an explanatory view showing an example of a lower body position fixture for the knee. The lower position fixing tool 61 for the knee of this example, the fixing shell for the knee (not shown), and the removable shell fixing part 63 attached to the lower position fixing tool 61 are combined for the knee. Positioning system is configured.

The lower position fixture 61 is a knee fixture for placing both knees in order to be able to restrain the pelvis of a patient or subject lying on the treatment bed in radiotherapy, CT examination, and MRI examination. The lower body position fixing tool 61 is used by being fixed to the top surface of the treatment table with double-sided tape or the like. The lower body position fixing tool 61 includes a cushion 611 filled with an elastic material such as foam, and a height adjusting plate 612 laminated on the bottom surface of the cushion 611 as needed. The cushion 611 has a chevron-shaped upper surface that follows the bent state of the knee, and curved holding surfaces 613 for knee-mounting are formed on the top of the upper surface at regular intervals.

The detachable shell fixing portion 63 is attached to the cushion 611 in a state of extending in the front-rear direction at a portion in the middle of both side surfaces in the width direction of the cushion 611. The shell fixing portion 63 has the same configuration as the shell fixing portions 23 (FIG. 2), 33 (FIG. 3), and 53 (FIG. 5) described above, and includes a resin lower mounting plate 631 extending in the front-rear direction. .. On the lower mounting plate 631, for example, three engaging projections 632 are formed in a row at regular intervals in the front-rear direction. The engagement protrusion 632 can be inserted into the mounting holes of the shell-side mounting plate mounted on both edges of the position-fixing shell for the knee (not shown), and is arranged so as to correspond to each mounting hole. ing. Further, a pair of fastening knobs 633 are attached to the front and rear ends of the lower mounting plate 631.

A male side fastener (not shown) is attached to the back surface of the lower mounting plate 631. Female side fasteners (not shown) to which the male side fasteners can be attached are attached to the edge portions on both sides of the lower body position fastener 61 for knees so as to extend in the anteroposterior direction. Therefore, the shell fixing portion 63 provided with the lower mounting plate 631 can be attached to and detached from the lower body position fixing tool 61 for the knee with one touch.

Here, FIGS. 6B (a) and 6B (b) are explanatory views showing an example of a positioning unit for positioning and fixing the lower body position fixing tool 61 having this configuration to the top surface 1a. The positioning unit includes an index bar 90. It is also possible to use a positioning unit provided with double-sided tape or a positioning unit having another configuration. As shown in the figure, a plurality of bar mounting grooves 615 extending in the width direction are formed on the back surface 614 of the lower position fixing tool 61. Fitting holes 616 for fitting the pin heads are formed on the bottom surface of each bar mounting groove 615 at regular intervals in the width direction. Also in this case, as in the case of the above-described example, the index bar 90 and the two pins 93 positioned and fixed to the top surface 1a are provided with a single bar mounting groove on the back surface of the lower position fixing tool 61. 615, the pair of fitting holes 616 are positioned, and the lower position fixing tool 61 is attached to the index bar 90. The lower body position fixing tool 61 is positioned and fixed to the top surface 1a via the index bar 90.

[Example of lower position fixing device for head with integrated shell fixing part]
FIG. 7 is an explanatory view showing an example of a lower position fixing tool for the head having a structure in which a shell fixing portion is incorporated and integrated. The lower body position fixing tool 71 for the head, the body position fixing shell 22 for the head shown in FIG. 2A (b), and the integrated shell fixing portion 73 incorporated in the lower body position fixing tool 71 are combined. , A posture fixation system for the head is constructed.

The lower body position fixing tool 71 for the head is basically the same as the lower body position fixing tool 21 shown in FIG. 2A, and is a molded product made of a rectangular resin foam that is long in the front-rear direction as a whole. The lower body position fixture 71 is formed with a convex neck holding surface 711 on the front end side thereof for mounting the patient's neck portion in the anterior-posterior direction (head-to-tail direction). On the posterior side, a curved occipital region holding surface 712 for smoothly and continuously placing the patient's occipital region on the posterior end of the neck holding surface 711 is formed. Both sides of the lower body position fixing tool 71 in the width direction are side surfaces 713 and 714 extending in the vertical direction, and the bottom surface is a flat surface, which is fixed to the treatment table with double-sided tape or the like. A shell fixing portion 73 is incorporated in each of the lower end edges of the side surfaces 713 and 714.

The shell fixing portion 73 includes resin engaging protrusions 732 fixed at regular intervals in the front-rear direction along the lower end edges of the side surfaces 713 and 714 of the lower position fixing tool 71. For example, three engaging protrusions 732 are arranged in a row at regular intervals in the front-rear direction. The engaging projection 732 can be inserted into the mounting holes of the shell-side mounting plate of the posture fixing shell (not shown), and is arranged so as to correspond to each mounting hole. Further, a pair of fastening knobs 733 are attached to the front and rear ends of the lower end edges of the side surfaces 713 and 714 of the lower body position fixing tool 71.

[Example of lower position fixing device for head with integrated shell fixing part]
FIG. 8A is an explanatory view showing a lower position fixing tool for the head having a structure in which a shell fixing portion is incorporated and integrated, and FIG. 8B is an explanatory view showing the shell fixing portion. is there. The lower position fixing tool 81 for the head shown in these figures, the position fixing shell 32 for the head shown in FIG. 3A (b), and the shell fixing integrated with the lower position fixing tool 81. In combination with the part 83, a posture fixing system for the head is constructed.

Since the lower position fixing tool 81 for the head is a suction type bag and is the same as the lower position fixing tool 31 shown in FIG. 3A, the description thereof will be omitted.

The shell fixing portion 83 has the same configuration as the shell fixing portion 23 (FIG. 2A) described above, and includes a resin lower mounting plate 831 extending in the front-rear direction. On the lower mounting plate 831, for example, three engaging projections 832 are formed in a row at regular intervals in the front-rear direction. The engaging protrusion 832 can be inserted into the mounting holes of the shell-side mounting plate of the fixed shell, and is arranged so as to correspond to each mounting hole. Further, a pair of fastening knobs 833 are attached to the front and rear ends of the lower mounting plate 831.

Here, the lower mounting plate 831 is incorporated and integrated inside the edge portions on both sides in the width direction of the lower body position fixing tool 81. The engagement protrusion 832 and the knob 833 project outward from the edge portion of the lower position fixing tool 81.

Even when the lower position fixing tool 81 having the structure in which the shell fixing portion 83 is integrated is used, the same as in the case of the lower position fixing tool 31 provided with the removable shell fixing portion 33 shown in FIG. 3A. The position fixing shell can be fixed to the lower position fixing tool 81.

[Other embodiments]
It should be noted that the above-mentioned posture fixing systems can also be used in combination. For example, the combination of the posture fixing system 10 of FIG. 1 and the posture fixing system 20 shown in FIG. 2A, the combination of the posture fixing system 10 of FIG. 1 and the posture fixing system 30 of FIG. 3A, the posture fixing system 10 of FIG. A composite posture fixing system composed of various combinations can be used, such as a combination of the posture fixing system 20 of the above and a posture fixing system provided with the lower posture fixing tool 61 shown in FIG. 6A.

1 Treatment table 1a Top surface 10, 20, 30, 40 Position fixing system 11, 21, 31, 41, 51, 61, 71, 81 Lower position fixing tool 12, 22, 32, 42 Position fixing shell 13, 23, 33, 43, 53, 63, 73, 83 Shell fixing part 44 surface Fastener 90 Index bar 91 Bar body 92 Pin mounting hole 93 Pin 94 Pin 100 Plate 101 hole 111 Bag 112 Bottom surface 113 Holding surface 114 Suction pipe 121, 221 and 321 , 421 Shell body 122, 222, 322, 422 Shell side mounting plate 123, 223, 323, 423 Mounting holes 131, 231, 331, 431, 531, 631, 831 Lower mounting plate 132, 232, 332, 432, 532, 632, 732, 832 Engagement protrusions 133, 233, 333, 433, 533, 633, 733, 833 Knobs 211 Neck holding surface 212 Rear head holding surface 213, 214 Side 215 Back surface 216 Mounting groove 217 Fitting hole 311 Bag 312 Suction port 313 Lower surface 314 Holding surface 411 Bag 511 Outer peripheral side cushion 512 Central side cushion 513 Holding surface part 514, 515 Curved part 611 Cushion 612 Adjusting plate 613 Holding surface 614 Back surface 615 Mounting groove 616 Fitting hole 711 Neck holding surface 712 Rear head Holding surface 713, 714 Side surface

Claims (4)

In a position fixation system used to position and fix a target part of the human body to be diagnosed, treated or examined by radiation on the patient or subject's body placed on a treatment table.
A lower body position fixture for holding the target part of the human body on the treatment table in a positioned state from the lower side in the vertical direction of the treatment table.
A posture fixing shell for positioning and fixing the human body target part on the treatment table from above in the vertical direction,
A shell fixing portion for fixing the position fixing shell to the lower position fixing tool,
Is equipped with
The lower body position fixing tool is provided with a holding surface on which the target part of the human body is placed in a state of being positioned in the anteroposterior direction or the width direction of the treatment table.
The body position fixing shell has a shape along the human body target part in order to fix the human body target part to the holding surface in a state of being positioned in the front-rear direction or the width direction from the upper side in the vertical direction. A position-fixing system characterized in that it comprises a sheet or film made of a thermoplastic resin that can be molded in such a manner. In the posture fixing system according to claim 1,
The lower position fixing tool is
Head fixture for holding parts including the head of the human body,
Head / arm fixtures for holding the supine human head and parts including both arms,
A torso / lumbar fixture for holding parts including the torso and lumbar region of the human body, or
A position-fixing system that is a knee-fixing device for holding the area including both knees so that the pelvis of the supine body can be restrained. In the posture fixing system according to claim 1 or 2.
The shell fixing portion is a body position fixing system that is detachably attached to the lower body position fixing tool. In the posture fixing system according to claim 1, 2 or 3.
The posture-fixing shell includes a shell-side mounting plate attached to both edges of the sheet or film in the width direction, and a plurality of mounting holes formed in the shell-side mounting plate.
The shell fixing portion has a lower mounting plate in which a plurality of engaging protrusions that can be inserted into the mounting holes are formed at positions corresponding to the mounting holes, and the engaging protrusions are inserted into the mounting holes. A posture fixing system including a fastener for fastening the shell-side mounting plate to the lower mounting plate in the closed state.

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