JP7132618B2 - motion control bag - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body motion restraint bag that presses the body surface of a predetermined part of a patient to be treated with radiotherapy or the like to restrain the body movement of the predetermined part.

BACKGROUND ART As a treatment for malignant tumors such as cancer, radiotherapy is sometimes performed in which an affected area is irradiated with radiation such as X-rays or particle beams such as proton beams and heavy particle beams. In this radiotherapy, it is necessary to accurately irradiate the affected area with radiation. However, if the patient moves during radiation irradiation, the affected area also moves, and radiation may not be accurately applied to the affected area. When the affected part exists in the thoracoabdomen or the pelvis, the position of the affected part may move due to the movement of the thoracoabdomen accompanying the patient's breathing. Therefore, it is necessary to irradiate radiation while surely suppressing the body movement of a predetermined part of a patient having an affected part. In order to accurately grasp the position of the patient's affected area before radiotherapy, examinations such as computed tomography (CT) and magnetic resonance imaging (MRI) are also performed. Also in this case, it is necessary to sufficiently suppress the body movement of the patient's predetermined parts.

Conventionally, as a pressing member that suppresses the body movement of a patient undergoing radiotherapy, CT, MRI, or other examination, for example, as described in Non-Patent Document 1 below, the shape of the body surface of a predetermined part of the patient is followed. A fixation shell is used which consists of a molded thermoplastic resin. Specifically, a fixed shell is molded in advance to follow the shape of the body surface of a predetermined part of the patient, the patient with this fixed shell attached to the predetermined part is placed on the base plate, and the end of the fixed shell is attached to the base plate. By connecting to the fixed connecting portion, it is possible to position the patient at a predetermined position on the base plate while suppressing the body movement of the predetermined portion.

The means for suppressing body movement of a patient using the fixing shell can be easily applied to radiation irradiation apparatuses and examination apparatuses that have been used conventionally. However, since the fixing shell is formed of a thin plate or mesh made of thermoplastic resin, movement of the affected area based on body movement of the thorax and abdomen associated with breathing, for example, is sufficient for radiotherapy and examination. It is difficult to suppress it to a certain extent. In addition, radiation therapy is often performed over a long period of time in view of the radiation dose to which the patient is exposed. or gaps may develop between the fixation shell and the body surface of the patient at the site of interest. In such a case, it becomes difficult to restrain the body movement of the patient at a predetermined site, so it is necessary to reshape the fixing shell to fit the patient's body shape.

Body movement suppressing means for preventing a decrease in body motion suppressing force due to changes in the body shape of a patient is, for example, proposed in Patent Document 1 below, in which a granular material is filled inside and adhered to a predetermined site of the patient. It is conceivable to supply pressurized air between the inner bag and the outer bag covering the inner bag, and restrain the patient's body movement with granular materials. According to this body movement suppressing means, since the body surface of a portion of the patient inserted in the inner bag and the granular material come into contact with each other, it is possible to prevent a decrease in the body movement suppressing force even if the patient's body shape changes. However, since this body movement suppressing means uses an inner bag filled with granular material and an outer bag covering the inner bag, if an attempt is made to suppress body movement of the patient's chest or abdomen, it is There is a risk that the means will become complicated and large, and handling such as putting on and taking off the patient will be complicated.

Yoshiyuki Shioyama et al, Radiation Medicine: Vol.23, No.6, p.407-413, 2005

Japanese Patent Publication No. 2010-516311

The present invention has been made to solve the above-mentioned problems, and is easy to handle, such as putting it on and taking it off from a patient. It is an object of the present invention to provide a body movement restraining bag which can be maintained even if there is a change in body shape, and a pressing force adjusting method using the body movement restraining bag.

The present invention, which has been made in order to achieve the above object, is made of a non-magnetic material that transmits radiation, and is for suppressing the body movement of the patient's chest , and presses the body surface corresponding to the chest including the dovetail. a bag-like portion made of cloth made of non-magnetic material that transmits radiation and is inserted into a gap between the member and the body surface corresponding to the dovetail ; and an air supply path for supplying air for inflating the bag-like portion so that the pressing force for pressing the body surface corresponding to the dovetail can be adjusted , wherein the bag-like A plate that is smaller than the bag-like portion and made of a non-magnetic material that transmits radiation and is thicker than the fabric forming the bag-like portion is provided on the surface of the portion facing the pressing member. The bag-shaped portion is joined at a position where it is inserted into a positioning concave portion formed in the pressing member so that when the portion swells, the bag-like portion can press the body surface corresponding to the dovetail. It is a movement restraint bag.

Since the bag-shaped part is formed of a material having flexibility so as to be deformable along the body surface corresponding to the dovetail of the patient, the surface of the bag-shaped part on the body surface side conforms to the dovetail of the patient. Contact can be made along the corresponding body surface, and the swollen bag-like portion can press the body surface corresponding to the dovetail of the patient with a predetermined pressing force.

A pressure gauge for measuring the pressure inside the bag-like portion is provided in the air supply path to the bag-like portion, including the air supply path, so that the pressing force on the body surface corresponding to the dovetail of the patient can be measured. It can be measured with a meter and can be easily adjusted to the appropriate pressing force by adjusting the pressure.

It is preferable that the cloth forming the bag-like portion has a thickness of 0.1 to 1 mm, the plate is made of resin or its foam, and has a thickness of 3 to 10 mm.

Preferably, the fixing member is a pressing plate or a fixing shell made of thermoplastic resin.

The fixation shell is a molding that is shaped to follow the shape of the patient's chest including the dovetail, and is applied over the entire chest including the dovetail to fix the patient at a predetermined position on the base plate. The plate body is inserted when the bag-shaped portion is connected to a connecting portion fixed to the base plate so as to suppress the body movement of the chest by expanding the bag-like portion to a position corresponding to the dovetail. The air supply path from the bag-like portion extends outside the fixing shell , thereby suppressing body movement of the patient's chest over a wide range. can.

It is preferable that the thermoplastic resin forming the fixing shell is poly-ε-caprolactone.

The above-described body motion suppression bag according to the present invention, that is , a pressing member that is made of a non-magnetic material that transmits radiation, is for suppressing body motion of the patient's chest , and presses the body surface corresponding to the chest including the dovetail. and a body surface corresponding to the dovetail, a bag-shaped portion formed of cloth made of non-magnetic material that transmits radiation, and extending from the bag-shaped member, an air supply path for supplying air for inflating the bag-shaped portion, and a non-magnetic material that is smaller than the bag-shaped portion and transmits radiation on the surface of the bag-shaped portion on the side of the pressing member. A plate made of a material that is thicker than the fabric forming the bag-shaped portion serves as the pressing member so that the bag-shaped portion can press the body surface corresponding to the dovetail when the bag-shaped portion expands. In order to adjust the pressing force on the body surface using the body movement suppressing bag joined at the position where it is inserted into the positioning recess formed in the Air is supplied to the inside of the bag-like portion through the sack-like portion, and the bag-like portion is inflated so that the pressing force on the body surface corresponding to the dovetail can be adjusted .

By forming the bag-shaped part with a material having flexibility so that it can be deformed along the body surface corresponding to the dovetail of the patient, the surface of the bag-shaped part on the body surface side corresponds to the dovetail of the patient. It can be contacted along the body surface, and can press the body surface corresponding to the dovetail of the patient with a predetermined pressing force by the bulging bag-like portion.

An air supply path to the bag-like part including the air supply path is provided with a pressure gauge for measuring the pressure inside the bag-like part, and an amount of air is supplied to the bag-like part so that the inside of the bag-like part has a predetermined pressure. By adjusting , the pressing force on the body surface corresponding to the dovetail of the patient can be measured with a pressure gauge, and the appropriate pressing force can be easily adjusted by adjusting the pressure.

It is preferable that the thickness of the fabric forming the bag-shaped portion is 0.1 to 1 mm, the plate is made of resin or its foam, and the thickness is 3 to 10 mm.

As the fixing member, it is preferable to use a pressing plate or a fixing shell made of thermoplastic resin.

The fixation shell is a molding that is molded to follow the shape of the patient's chest including the dovetail, and the patient covered over the entire chest including the dovetail is fixed at a predetermined position on the base plate. It is connected to a connecting portion fixed to the base plate so as to suppress the body movement of the chest , and is positioned such that the plate is inserted when the bag-shaped portion bulges to a position corresponding to the dovetail. By using a device in which a recess is formed and by extending the air supply path from the bag-like portion to the outside of the fixing shell, body movement of the patient's chest can be suppressed over a wide range. .

Poly-ε-caprolactone is preferably used as the thermoplastic resin forming the fixing shell.

According to the body motion suppression bag of the present invention, it can be easily put on and taken off from a patient, and when the body shape of the patient changes during treatment such as radiation irradiation, the patient's body movement is suppressed by pressing a predetermined part of the patient. When the body movement suppressing force of the pressing member is reduced, air is supplied to the bag-like portion inserted between the pressing member and the body surface of the patient at a predetermined site to inflate the body at the predetermined site of the patient. It is possible to recover the body movement suppressing force that presses the surface. Therefore, even if there is a change in the patient's body shape, the patient's body movement suppressing force by the pressing member can be maintained.

1 is a perspective view showing a first embodiment using a first body motion suppression bag to which the present invention is applied; FIG. 1A and 1B are a plan view and a cross-sectional view of a first body movement suppression bag to which the present invention is applied; FIG. 4 is a partial cross-sectional view showing a state in which the first body movement suppressing bag to which the present invention is applied is attached; FIG. 4 is a partial cross-sectional view showing a state in which a gap is formed with the first body movement restraint bag to which the present invention is applied. FIG. 10 is a perspective view showing a state in which the air supply means is connected with the first body movement suppression bag to which the present invention is applied; FIG. 10 is a partial cross-sectional view showing a state in which the first body movement restraint bag to which the present invention is applied is attached and the bag-like portion is inflated to close the gap; FIG. 4A is a plan view and a cross-sectional view showing a second body motion suppression bag to which the present invention is applied; FIG. 10 is a perspective view showing a second embodiment using a second body motion restraint bag to which the present invention is applied; FIG. 10 is a partial cross-sectional view showing a state in which the second body movement suppressing bag according to the present invention is attached; FIG. 11 is a partial cross-sectional view showing a state in which a gap is formed by wearing a second body movement suppression bag to which the present invention is applied, and a state in which the bag-like portion of the second body movement suppression bag is inflated to close the gap; It is a partial cross-sectional view. FIG. 11 is a partial cross-sectional view showing another state in which a gap is formed by wearing a second body movement suppression bag to which the present invention is applied, and a state in which the gap is closed by inflating the bag-like portion of the second body movement suppression bag. is a partial cross-sectional view showing FIG. 10 is a plan view showing a third body motion restraint bag to which the present invention is applied; FIG. 11 is a side view showing a third embodiment using the first body motion restraint bag to which the present invention is applied;

Modes for carrying out the present invention will be described in detail below, but the scope of the present invention is not limited to these modes.

FIG. 1 is a perspective view showing a first embodiment to which the first body movement restraint bag of the present invention is applied. A patient 10 placed on a rectangular base plate 12 has a pressure member on its chest as a pressing member. is attached with the fixing shell 14 of FIG. Both ends of the fixing shell 14 are connected to connecting portions 15 that are fixed to the respective long sides of the base plate 12, and the patient 10 is fixed at a predetermined position on the base plate 12, while the chest is fixed. Body motion, that is, deep breathing of the patient 10 is suppressed, and body motion of the chest due to deep breathing is suppressed.

On the back side of the base plate 12 and the patient 10, a fixing bag formed in an uneven shape following the shape of the body surface on the back side of the patient 10 is arranged. Positioning can be easily performed, which is preferable. The fixed bag is filled with a granular material inside the bag. When the inside of the bag is in an atmospheric pressure state, the granular material can move freely in the bag. It will be in a restrained state inside the bag. When such a fixed bag is placed at a predetermined position on the base plate 12 and the patient 10 is placed on the fixed bag, the granular material is shaped like the body surface on the back side of the patient 10 in the bag shape under atmospheric pressure. , and the upper side of the fixing bag has a shape that follows the shape of the body surface on the back side of the patient 10 . Next, by reducing the pressure inside the bag of the fixing bag, the granular material inside the bag is restrained, and the shape of the upper surface of the fixing bag is fixed. A member for bending the patient's 10 knee into a "<" shape may be placed on the base plate 12 corresponding to the patient's 10 knee.

The fixing shell 14 attached to the chest of the patient 10 is made of a thermoplastic resin and is shaped to follow the shape of the body surface of the chest of the patient 10 . The thermoplastic resin may be a thermoplastic elastomer, thermoplastic polyurethane, thermoplastic polyisoprene, thermoplastic polyester, thermoplastic polyolefin, polyvinyl chloride, polystyrene or a blend of two or more of these materials. mentioned. Thermoplastic polyolefins include polyethylene, polypropylene or ethylene-propylene copolymers, and thermoplastic elastomers include copolymers of ethylene and at least one α-olefin having 3 to 10 carbon atoms, or among such copolymers. preferably a copolymer of ethylene and 1-butene or a copolymer of ethylene and 1-octene or a blend of two or more of such copolymers be. Specific examples of polyesters include polyethylene vinyl acetate, polyacrylate or polymethacrylate, high molecular weight fatty acid esters, and poly-ε-caprolactone.

The fixing shell 14 made of these thermoplastic resins can be obtained using a plate or mesh-like body made of thermoplastic resin. Specifically, the fixing shell 14 is obtained by pressing a plate or mesh-like body heated to the processing temperature of the thermoplastic resin against a pre-formed mold that follows the shape of the body surface of the chest of the patient 10 . can be done. It is also preferable to use a plate or mesh made of a low-melting thermoplastic resin such as poly-ε-caprolactone whose melting point is 60°C. By heating a plate or mesh made of such a low-melting thermoplastic resin to a temperature that allows it to be bent to a workable degree and to a temperature that does not cause burns, and then directly pressed against the chest of the patient 10 . , it is possible to obtain the fixing shell 14 that follows the body surface shape of the chest of the patient 10, which is preferable.

A fixing shell 14 that follows the shape of the body surface of the chest of the patient 10 is attached to the chest of the patient 10, and both ends thereof are attached to connecting portions 15 fixed to respective long sides of the base plate 12. Concatenated. The patient 10 is fixed at a predetermined position on the base plate 12 by the attached fixing shell 14 , while restraining deep breathing and restraining body movement of the chest due to deep breathing.

Between the fixing shell 14 attached to the chest of the patient ₁₀ and the body surface corresponding to the dovetail of the chest, as shown in FIG. _B1 ) is inserted. FIG. 2(a) shows a front view of a bag _B1 having a bag-like portion 16 smaller than the fixing shell 14 as shown in FIG. _The bag-like portion 16 of the bag B1 has a hexagonal shape, and an air supply path 18 having a connector 20 connected to an air supply means at its tip is drawn out from the bag-like portion 16 . As shown in FIG. 2B, which is a cross-sectional view taken along line XX of FIG. , 16b are welded with a width of 4 to 6 mm. Also, the air supply path 18, as shown in FIG. 2C, which is a cross-sectional view taken along YY in FIG. 18c is welded over a width of 4 to 6 mm to form a cylindrical shape. The central portion 18d of the air supply path 18 is welded along the center line with a width of 2 to 5 mm so that the air supply path 18 does not bulge excessively.

The fabrics 16a, 16b and fabrics 18a, 18b having gas barrier properties are preferably made of a non-magnetic material that transmits radiation such as X-rays. Fabrics made of elastic resin films and fabrics laminated with a plurality of kinds of synthetic resin films such as polyester used for retort pouches and the like to provide gas barrier properties can be mentioned. In addition, fabrics such as woven fabrics made of chemical fibers such as nylon or natural fibers, knitted fabrics, non-woven fabrics containing paper, etc. are coated with a resin such as vinyl chloride or polyurethane on one side or laminated with a resin film to impart gas barrier properties. There may be. Since the fabrics 16a and 16b constitute the bag _B1 and come into direct contact with the human body, it is preferable that the fabrics 16a and 16b have flexibility. Therefore, the thickness of the fabrics 16a and 16b is preferably about 0.1 to 1 mm in consideration of the strength of the bag-like portion 16. FIG. The fabrics 18a and 18b forming the air supply path 18 may be the same fabric as the fabrics 16a and 16b or different fabrics. It is preferable to set the thickness to about 0.1 to 1 mm.

As shown in FIG. ₁ , the bag-like portion 16 of the bag B1 inserted between the body surface corresponding to the dovetail of the chest of the patient 10 and the fixation shell 14 allows the body shape of the patient 10 to mold the fixation shell 14. If it is substantially the same as when it is held, the body surface corresponding to the dovetail of the chest 10a of the patient 10 and the fixing shell 14 are brought into close contact as shown in FIG. In the state shown in FIG. 3, since body movement of the chest 10a can be suppressed only by the fixing shell 14, the patient 10 can be subjected to radiotherapy or examination such as CT or MRI without expanding the bag-like portion 16. . In such a case, it is not necessary to insert the bag-like portion 16 between the body surface corresponding to the dovetail of the chest of the patient 10 and the fixation shell 14 .

However, the body shape of the patient 10 is deformed more than when the fixation shell 14 is molded, and as shown in FIG. Once formed, the fixing shell 14 alone cannot sufficiently press the dovetail of the chest 10a, and cannot sufficiently suppress body movement due to breathing of the chest 10a. In such a case, as shown in FIG. 4, the bag _- like portion 16 of the bag B1 is inserted into the gap 22, and as shown in FIG. A tube 28 to which an air bag 24 as an air supply means is connected is connected to the connector 20 at the tip of the air supply path 18 . A pressure gauge 26 for measuring the pressure inside the bag-like portion 16 is attached to the middle of the tube 28 .

By supplying air from an air bag 24 as an air supply means to the bag-like portion 16 through an air supply passage 18, the bag-like portion 16 expands as shown in FIG. 6 and closes the gap 22 shown in FIG. , the dovetail of the chest 10a can be sufficiently pressed. By adjusting the pressure of the bag-shaped portion 16 measured by the pressure gauge 26 to a predetermined pressure, the body surface corresponding to the dovetail of the chest 10a can be pressed with a predetermined pressing force, and body movement due to respiration of the chest 10a can be sufficiently suppressed. . It is preferable to provide the connector 20 or the air bag 24 with a check valve in order to adjust the pressure inside the bag-like portion 16 .

By the way, when the area of the gap 22 shown in FIG. 4 is large, when air is supplied to the bag _- like portion 16 of the bag B1 shown in FIGS. There is a risk of moving to a different location than where it was originally. Such a risk can be eliminated by using a _second body motion suppression bag B2 (hereinafter referred to as bag B2) shown in _FIG . The bag B ₂ shown in FIG. 7 has a front view of FIG. 7(a) and a cross-sectional view of FIG. A plate 17 that is less deformable than the bag-like portion 16 is joined to one side. A plate 17 shown in FIGS. 7A and 7B has a similar shape that is smaller than the hexagonal bag-like portion 16, and is joined to one side of the fabric 16a forming the bag-like portion 16. As shown in FIG. The plate 17 is made of a radiation-transmitting non-magnetic material, for example, a resin such as polyvinyl chloride, polystyrene, polyethylene, or polypropylene, or a foam thereof, and is made to be less deformable than the bag-shaped portion 16 . , and its thickness is preferably about 3 to 10 mm. Also, the plate 17 and the fabric 16a can be joined with a commercially available organic adhesive, double-sided tape, adhesive tape, glue, or the like. The bag B2 shown in _FIG . 7 is composed of the same members as the bag _B1 shown in FIGS. Therefore, _among the constituent members of the bag B2, the same members as those of the bag B1 _are given the same numbers, and the detailed description of each member is omitted.

A _second embodiment using the bag B2 shown in FIG. 7 is shown in FIG. The bag B2 is arranged such that the bag _- like portion 16 is between the body surface corresponding to the dovetail of the chest of the patient 10 and the fixing shell 14 as shown in FIG. is inserted into _The plate 17 of the bag B2 thus inserted is inserted into the positioning recess 14a previously formed in the fixing shell 14 as shown in FIG. The fixing shell 14 having such a positioning recess 14a can be processed by heating a plate or mesh made of a thermoplastic resin with a low melting point such as poly-ε-caprolactone with a melting point of 60°C. After adjusting the temperature to the extent that it can be bent to a certain extent and does not cause burns, the bag-shaped part 16 shown in FIG. It is possible to obtain the fixing shell 14 having a shape following the shape and having the positioning recess 14a opened at a predetermined position on the inner surface side. _The positioning concave portion 14a of the fixing shell 14 can position the bag B2 at a predetermined position when the fixing shell 14 and the bag B2 _are attached to a predetermined portion of the patient during another radiotherapy or examination. can.

The body shape of the patient 10 is deformed more than when the fixation shell 14 is molded, and as shown in FIG. When the gap 22 is formed between them, the fixing shell 14 alone cannot sufficiently press the dovetail of the chest 10a, and cannot sufficiently suppress the body movement of the chest 10a. In such a case, as shown in FIG. 10(b), air is supplied from an air bag 24 (FIG. 5) into the bag-like portion 16 through an air supply path 18 to inflate the bag-like portion 16. , the body surface corresponding to the dovetail of the chest 10a can be pressed with a predetermined pressure by closing the gap 22, and body movement due to respiration of the chest 10a can be suppressed. At this time, as shown in FIG. 10(b), the plate 17 of the bulging bag-like portion 16 is inserted into the positioning recess 14a of the fixing shell 14, and the bulging bag-like portion 16 allows the chest to be accurately positioned. The body surface corresponding to the dovetail of 10a can be pressed.

The bag-like portion 16 of the bag B ₂ shown in FIGS. 8 to 10 has a plate body 17 on the side of the fixing shell 14 in the gap 22 between the body surface corresponding to the dovetail of the chest of the patient 10 and the fixing shell 14. However, when the body shape deformation of the patient 10 is small, the plate 17 may be inserted into the gap 22 so as to face the body surface of the patient 10 as shown in FIG. 11(a). In this case, it is not necessary to form the positioning recess 14 a in the fixing shell 14 . As shown in FIG. 11(a), the bag-like portion 16 inserted so that the plate 17 faces the body surface of the patient 10 is supplied with air from an air bag 24 (FIG. 5) through an air supply path 18. 11(b), the plate member 17 is pressed against the corresponding body surface of the patient 10 to correct the shape of the body surface and close the gap 22 to close the chest of the patient 10. The body surface corresponding to the dovetail can be pressed with a predetermined pressure.

The bag-shaped portions 16 of the bags B ₁ and B ₂ shown in FIGS. 1 to 11 were hexagonal, but the third body movement suppression bag B ₃ (hereinafter referred to as the bag B ₃ ) shown in FIG. It may be rectangular as well. Further, as shown in FIG. 3, the fixation shell 14 is formed to follow the body shape of the patient 10, and even if there is no gap between the body surface of the chest of the patient 10 and the fixation shell 14, After positioning the chest of the patient 10 at a predetermined position on the base plate 12 by the fixing shell 14, when the pressing force of the dovetail of the chest is insufficient, it is inserted between the body surface corresponding to the dovetail and the fixing shell 14. By inflating the bag _- like portion 16 of the bag B1, the dovetail may be pressed with a predetermined pressure to suppress body movement of the chest.

Restricting body movement of the chest of the patient 10 by the fixing shell 14 suppresses breathing of the patient 10 , and may give the patient 10 pain of dyspnea. In order to eliminate such a fear, after the chest of the patient 10 is positioned at a predetermined position on the base plate 12 with a force that does not make breathing difficult by the fixing shell 14, immediately before irradiating the patient 10 with radiation or magnetism, Air is automatically supplied from the air supply means to the bag-like portion 16 inserted between a predetermined position of the chest and the fixing shell 14, and the bag-like portion 16 is inflated to press the predetermined position of the chest with a predetermined pressure. You may make it suppress the body movement of a chest.

The fixing shell 14 as the pressing member described so far covers the entire chest of the patient 10. However, it is possible to suppress body movement of the chest by pressing only the dovetail portion of the patient 10. As shown in FIG. 13, which is the third embodiment, a pressing plate 30 for pressing the dovetail portion of the patient 10 can be used as a pressing member. The pressing plate 30 shown in FIG. 13 has a screw punch 36 which is screwed into a curved crosspiece 34 whose both ends are supported by two pillars 32a and 32b erected at the side ends of the base plate 12. attached to the tip. When the knob 38 attached to the rear end of the screw punch 36 is rotated in the left-right direction to rotate the screw punch 36, the pressing plate 30 moves up and down to push the dovetail portion of the patient 10 placed on the base plate 12. It can be pressed with a predetermined pressure. Between the pressing plate 30 and the body surface corresponding to the dovetail portion of the patient 10, the bag _- like portion 16 of the bag B1 is inserted. The pressing plate 30, the struts 32a and 32b, the crosspiece 34, the screw-punch 36, and the knob 38 are made of a radiation-transmitting non-magnetic material such as resin.

Normally, the pressing plate 30 is not formed following the body surface shape of the dovetail portion of the patient 10, and it is difficult to evenly press the body surface of the dovetail portion with a predetermined pressure with the pressing plate 30 alone. 2 is inserted between the pressing plate 30 and the body surface of the dovetail portion, and air is supplied to the bag _- like portion 16 to adjust the pressure to a predetermined level. The portion of the portion 16 on the side of the patient 10 swells following the shape of the body surface of the dovetail portion, and can evenly press the body surface of the dovetail portion. Although the bag _B1 shown in FIG. 2 is used in FIG. 13, the bag B2 shown in _FIG . 7 or the bag B3 shown in FIG. ₁₂ may be used. _When using the bag B2, it is preferable to form a positioning concave portion into which the plate member 17 is inserted in the pressing plate 30 . Moreover, the bag B2 may be arranged between the pressing plate 30 and the patient so that the plate body 17 thereof faces the body surface _side of the patient 10 . Furthermore, the bags B ₁ , B ₂ and B ₃ may be adhered to the pressing plate 30 with an adhesive, double-sided tape, or adhesive tape.

The bags B ₁ , B ₂ , and B ₃ described above are used for restraining the body movement of the chest of the patient 10, but are also used for restraining the body movement of the abdomen, head, hands, feet, etc. of the patient 10. can be used. At that time, the shape and material of the bag-like portion 16 can be arbitrarily changed so as to fit the patient's 10 body movement suppression portion.

INDUSTRIAL APPLICABILITY The present invention can be effectively used for radiation therapy, examination using X-rays and magnetism, and the like.

B ₁ : first body movement restraint bag, B ₂ : second body movement restraint bag, B ₃ : third body movement restraint bag, 10: patient, 10a: chest, 12: base plate, 14: fixing shell , 14a: positioning concave portion, 15: connecting portion, 16: bag-like portion, 16a, 16b, 18a, 18b: cloth, 16c, 16c: both ends of bag-like portion 16, 17: plate, 18: air supply path , 18c, 18c: both ends of the air supply path 18, 18d: central part of the air supply path 18, 20: connector, 22: gap, 24: air bag, 26: pressure gauge, 28: tube, 30: pressing plate, 32a, 32b: struts, 34: crosspieces, 36: screw punches, 38: knobs

Claims (7)

Between a pressing member made of a non-magnetic material that transmits radiation and for suppressing the body movement of the patient's chest , which presses the body surface corresponding to the chest including the dovetail , and the body surface corresponding to the dovetail. A bag-shaped portion formed of fabric made of a non-magnetic material that transmits radiation and is inserted into the gap formed in the
an air supply path extending from the bag-like member and supplying air for inflating the bag-like portion so that the pressing force pressing against the body surface corresponding to the dovetail can be adjusted. is a bag,
A plate that is smaller than the bag-shaped portion and made of a non-magnetic material that transmits radiation and is thicker than the fabric that forms the bag-shaped portion is provided on the surface of the bag-shaped portion facing the pressing member, The bag-shaped portion is joined at a position where it is inserted into a positioning concave portion formed in the pressing member so that when the bag-shaped portion expands, the bag-shaped portion can press the body surface corresponding to the dovetail. A motion control bag characterized by: 2. The movement restraint bag according to claim 1, wherein the bag-shaped part is made of a flexible material so as to be deformable along the body surface corresponding to the dovetail of the patient. 3. The body movement according to claim 1, wherein the air supply path to the bag-like part including the air supply path is provided with a pressure gauge for measuring the pressure inside the bag-like part. restraint bag. 1. The thickness of the cloth forming the bag-like portion is 0.1 to 1 mm, and the plate is made of resin or its foam and has a thickness of 3 to 10 mm. 4. The body movement suppressing bag according to any one of 1 to 3. The body movement restraint bag according to any one of claims 1 to 4 , wherein the fixing member is a pressing plate or a fixing shell made of thermoplastic resin . The fixation shell is a molding that is shaped to follow the shape of the patient's chest including the dovetail, and is applied over the entire chest including the dovetail to fix the patient at a predetermined position on the base plate. The plate body is inserted when the bag-shaped portion is connected to a connecting portion fixed to the base plate so as to suppress the body movement of the chest by expanding the bag-like portion to a position corresponding to the dovetail. 6. The body movement restraint bag according to claim 5 , wherein the air supply path from the bag-like portion extends outward from the fixing shell. . 6. The body movement restraint bag according to claim 5, wherein the thermoplastic resin forming the fixing shell is poly-ε-caprolactone .

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