JP7411230B2 - Body movement control device, how to use the body movement control device, and body movement control bag - Google Patents

Description

The present invention relates to a body movement suppressing device that applies a predetermined load to the body surface corresponding to a predetermined part of a patient undergoing radiation examination and/or treatment to suppress the body movement of the predetermined part, and the body movement suppressor. The present invention relates to a method of using the device and a movement restraining bag used therefor.

As a treatment for malignant tumors such as cancer, radiation therapy is sometimes performed in which the affected area is irradiated with radiation such as X-rays or particle beams such as proton beams and heavy ion 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 there is a risk that the radiation cannot be accurately irradiated to the affected area. If the affected area is located within the thoracoabdominal region or pelvis, the position of the affected area may shift due to movement of the thoracoabdominal area as the patient breathes. Therefore, it is necessary to irradiate radiation while reliably suppressing the body movement of a predetermined part of the patient where the affected part is present. In addition, in order to accurately determine the location of the affected area before radiation therapy, tests such as computed tomography (CT) using X-rays are also performed. At that time as well, it is necessary to sufficiently suppress the body movement of a predetermined region of the patient.

Conventionally, as a restraining device for restraining a patient's body movement, a bag-shaped air chamber is provided between a belt wrapped around a predetermined part of the patient and the body surface, as described in, for example, Patent Document 1 below. Air is injected into this air chamber to press the body surface of a predetermined region of the patient to suppress body movement. However, with this restraint device, it is unclear how much load is being applied to the patient, and when radiation therapy is repeated over several days, there is a risk of variation in the load applied to the patient. It is unclear whether the patient's body movements can be sufficiently suppressed.

In this regard, Patent Document 2 listed below describes a body movement suppressing device that can confirm that the patient's body movements are sufficiently suppressed. This body movement restraint device consists of a trunk fixing device that fixes the trunk of a patient lying supine on a bed, a support stand installed above the patient's abdomen, and a support that is movable in the vertical direction on the support stand. The diaphragm compression device is composed of a drive shaft that is mounted on the patient's body, and a compression plate that is installed at the tip of the drive shaft. A pressure-receiving container, which is flexible and has a flat sheet-like shape as a whole, and air is hermetically sealed in a hollow body, is provided to be sandwiched between the patient and the compression plate, and the pressure-receiving container and a predetermined tube are connected to each other. A detection sensor that detects the pressure acting on the pressure-receiving vessel via the enclosed air is provided in a hollow containment vessel that communicates with the pressure-receiving vessel through a passage. This detection sensor uses a highly sensitive piezoelectric element.

According to the suppression device described in Patent Document 2, the patient's breathing can be monitored and it can be confirmed that the patient's body movements due to breathing are sufficiently suppressed. However, patient breathing is monitored by changes in the air pressure sealed in the pressure container, and the air pressure in the pressure container is determined by the contact area between the patient and the pressure container, the degree of deformation of the patient's body shape, and the pressure container. Since the load changes depending on the degree of deformation, when radiation therapy is repeatedly performed over several days, it is difficult to reliably apply a predetermined load to a patient whose body shape changes each time the radiation is irradiated. In addition, pressure changes in the pressure vessel include pressure changes due to the patient's breathing and pressure changes due to the heartbeat, which causes a lot of noise to enter the signal from the detection sensor, so we extract the signal due to pressure changes only due to breathing movements. This also requires complicated operations, and the suppression device becomes complicated.

Utility Model Publication No. 2-104011 JP2013-17491A

The present invention has been made to solve the above-mentioned problems, and it is possible to reliably grasp the load applied to the body surface of a predetermined part of a patient undergoing examination and/or treatment using radiation. To provide a body movement restraining device that can be reliably applied to a patient and a method for using this body movement restraining device, and further to provide a body movement restraining device that can be applied to a patient repeatedly, even if the patient's body shape changes when it is repeatedly performed over a predetermined period like radiotherapy. An object of the present invention is to provide a body movement restraining bag that can reliably apply a predetermined load to a patient each time radiation is irradiated.

The body movement suppressing device according to the present invention, which has been made to achieve the above object, is made of a non-magnetic material that transmits radiation, is used for examination and/or treatment using radiation, and is made of a non-magnetic material that transmits radiation. A pressing member that is a suppressing member and presses a body surface corresponding to the predetermined region, and a bag-shaped portion made of a non-magnetic material that transmits radiation and inserted between the pressing member and the body surface. and an air supply path extending from the bag-like part and supplying air that inflates the bag-like part so that the load applied to the body surface can be adjusted. A load is applied to a plate-like part that is harder than the pouch-like part and is joined to the surface of the pouch-like part on the pressing member side so that the load applied to the patient's body surface by the bulged pouch-like part can be detected. A strain sensor or a piezoelectric sensor is provided as a detection sensor , and the pressing member has a positioning recess into which the plate-shaped portion and the strain sensor or the piezoelectric sensor are inserted when the bag-shaped portion is expanded. It is being formed .

By providing the strain sensor or the piezoelectric sensor on a plate-shaped portion larger than the strain sensor or the piezoelectric sensor , the ease of handling the small strain sensor or piezoelectric sensor can be improved.

By providing a pressure gauge for measuring the pressure inside the pouch in the air supply path to the pouch including the air supply path, the load on the body surface of a predetermined region of the patient can be measured using a strain sensor or a piezoelectric sensor. and a pressure gauge, the load applied to the patient can be adjusted even more precisely.

By inserting the bag-like part into the gap created between the pressing member and the body surface of the patient, a gap is created between the pressing member and the patient's body surface due to deformation of the patient's body shape. Also, by expanding the pouch-shaped portion, a predetermined body movement restraining force can be applied to the patient.

The pouch-like part is formed of a flexible material so that it can be deformed along the body surface of the patient, so that the surface of the pouch-like part on the body surface side conforms to the body surface of a predetermined region of the patient. The swollen pouch-shaped portion can apply a predetermined load to the body surface of a predetermined region of the patient.

A pressure gauge for measuring the pressure inside the pouch is provided in the air supply path to the pouch, which includes the air supply path, so that the load on the body surface of a predetermined region of the patient can be detected. Using sensors and pressure gauges, the load applied to the patient can be adjusted even more precisely.

The pressing member is molded to follow the shape of a predetermined region of the patient, and is configured to fix the patient attached to the predetermined region at a predetermined position on a base plate and suppress body movement of the predetermined region. Since the fixing shell is made of thermoplastic resin and is connected to a connecting portion fixed to the base plate, body movement of the patient's chest, abdomen, etc. can be suppressed over a wide range.

Preferably, a monitor is provided that amplifies the electrical signal from the strain sensor or the piezoelectric sensor to detect the load applied to the patient's body surface when the bag-shaped portion expands.

The body movement suppressing device according to the present invention is preferably used as follows.
That is, it is a member that is used for examination and/or treatment using radiation, is made of a non-magnetic material that transmits radiation, and suppresses body movement of a predetermined region of a patient, and presses the body surface corresponding to the predetermined region. a bag-like part made of a radiation-transparent non-magnetic material inserted between the press member and the body surface; and a load extending from the bag-like part and applied to the body surface. an air supply path for supplying air to inflate the bag-like part so that the air pressure can be adjusted; and the bag is joined to a surface of the bag-like part on the pressing member side. A strain sensor or a piezoelectric sensor as a load detection sensor is provided on the plate-like part, which is harder than the shaped part, so as to detect the load applied to the patient's body surface by the expanded pouch-like part as an electrical signal, A body movement suppressing device is used in which the pressing member is formed with a positioning recess into which the plate-like part and the strain sensor or piezoelectric sensor are inserted when the pouch-like part is expanded. By monitoring the load applied to the patient's body surface by amplifying the electrical signal from the strain sensor or piezoelectric sensor, it is possible to detect the load applied to the patient's body surface, and also to detect changes in the load over time. Can be monitored.
By providing the strain sensor or the piezoelectric sensor on a plate-shaped portion larger than the strain sensor or the piezoelectric sensor, the ease of handling the small strain sensor or piezoelectric sensor can be improved.

By providing a vital detection sensor for detecting the patient's heartbeat and/or body surface temperature on the patient-side surface of the bag-shaped portion, radiation irradiation is performed while monitoring the patient's heartbeat and/or body surface temperature. be able to.

By inserting the bag-shaped portion into the gap created between the pressing member and the body surface, even if a gap is created between the pressing member and the patient's body surface due to deformation of the patient's body shape, the bag-shaped portion can be inserted into the gap formed between the pressing member and the body surface. A predetermined body movement suppressing force can be applied to the body surface by expanding the part.

By forming the pouch-shaped part from a flexible material so that it can be deformed along the body surface, a gap is created between the pressing member and the body surface of a predetermined region of the patient due to deformation of the patient's body shape. Also, by inflating the bag-shaped portion, a predetermined body movement restraining force can be applied to the body surface of a predetermined region of the patient.

A pressure gauge for measuring the pressure inside the bladder is provided in an air supply path to the bladder including the air supply channel, and the pressure gauge and the strain sensor are used to optimize the load on the body surface. By adjusting the amount of air into the bag-shaped portion so as to achieve the desired value, the load on the body surface of a predetermined region of the patient can be adjusted even more accurately.

The fixing member is molded to follow the shape of the body surface of a predetermined region of the patient, and fixes the patient attached to the predetermined region at a predetermined position on the base plate to suppress body movement of the predetermined region. By using a fixing shell made of thermoplastic resin that is connected to a connecting portion fixed to the base plate, body movement of the patient's chest, abdomen, etc. can be suppressed over a wide range.

The body movement restraining bag according to the present invention, which has been made to achieve the above object, is made of a non-magnetic material that transmits radiation, is used for examination and/or treatment using radiation, and is made of a non-magnetic material that transmits radiation. a pressing member that is a suppressing member and presses the body surface corresponding to the predetermined region; a pouch-shaped portion inserted between the body surface; and a pouch-shaped portion extending from the pouch-shaped portion and applied to the body surface. and an air supply path for supplying air to inflate the bag-like part so that the load can be adjusted, the bag-like part having a recess formed in the pressing member. When the pouch-like part bulges out at a position corresponding to the pouch-like part, the swollen pouch-like part A strain sensor or a piezoelectric sensor is provided as a load detection sensor capable of detecting the load applied to the patient's body surface.

According to the body movement suppressing device and the body movement suppressing method according to the present invention, the load on a predetermined part of a patient to be subjected to radiation examination and/or treatment can be reliably grasped by the load detection sensor, and the pressure adjustment means The value can be adjusted to an appropriate value. Furthermore, when a treatment is repeatedly performed over a predetermined period of time, such as in radiation therapy, even if the patient's body shape changes, the body movement control bag according to the present invention will not affect the load detected by the load detection sensor. Based on this, it is possible to adjust the amount of air supplied to the bag-shaped portion and adjust the load to an appropriate amount, thereby reliably suppressing the patient's body movement.

FIG. 1 is a perspective view showing an embodiment using a first body movement suppressing device to which the present invention is applied. FIG. 1 is a plan view and a sectional view of a first body movement suppressing bag to which the present invention is applied, which is used in a first body movement suppressing device. FIG. 2 is a sectional view of a plate-shaped portion used in a first body movement suppression bag to which the present invention is applied. FIG. 2 is a partial cross-sectional view showing a state in which a first body movement suppression bag to which the present invention is applied is attached to a patient. It is a patient's breathing monitor detected by the strain sensor of the first body movement restraint bag to which the present invention is applied. A state in which a gap is formed between the first body movement restraining bag to which the present invention is applied and the patient is attached with the plate-shaped part facing the fixing shell that is the pressing member. They are a partial sectional view (FIG. 6(a)) and a partial sectional view (FIG. 6(b)) showing a state in which the pouch-shaped portion is bulged and the gap is closed. A partial cross-sectional view (FIG. 7(a)) showing the first body movement suppression bag to which the present invention is applied to a patient with the plate-like part facing the patient, and a state in which the bag-like part is bulged out. FIG. 7B is a partial sectional view (FIG. 7B) showing a state in which the gap is closed. A side view (FIG. 8(a)) showing a second body movement suppressing device to which the present invention is applied, using a first body movement suppressing bag, and a portion showing a third body movement suppressing device to which the present invention is applied. It is a side view (FIG. 8(b)). They are a sectional view (FIG. 9(a)) showing a fourth body movement suppressing device to which the present invention is applied, and a sectional view (FIG. 9(b)) showing a fifth body movement suppressing device to which the present invention is applied. . FIG. 3 is a cross-sectional view showing another example of a plate-shaped portion used in the first body movement suppression bag to which the present invention is applied. It is a back view explaining the 2nd body movement suppression bag to which this invention is applied.

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

FIG. 1 is a perspective view showing an embodiment to which a first body movement suppression device for examination and/or treatment using radiation of the present invention is applied. A patient 10 placed on a rectangular base plate 12 and subjected to an examination and/or treatment using radiation is shown with a fixing shell 14 as a pressing member attached to the chest thereof. The fixing shell 14 has both ends connected to connecting parts 15 fixed to each long side of the base plate 12. Body movements, that is, deep breathing of the patient 10, are suppressed, and body movements of the chest caused by deep breathing are suppressed.

A fixed bag having an uneven shape that follows the shape of the body surface on the back side of the patient 10 is disposed on the base plate 12 and the back side of the patient 10. It is preferable that positioning can be performed easily. The fixed bag is filled with granular material inside the bag, and when the inside of the bag is under atmospheric pressure, the granular material can move freely within the bag, and when the inside of the bag is under reduced pressure, It becomes 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 this fixed bag, the particulate material will be formed into the shape of the dorsal body surface of the patient 10 in the bag-shaped bag under atmospheric pressure. The upper surface side of the fixed 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 fixed bag, the particulate material inside the bag is restrained, and the shape of the upper surface of the fixed bag is fixed. Note that a member for bending the patient's 10 knee into a dogleg 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 thermoplastic resin and is molded to follow the shape of the body surface of the chest of the patient 10. The thermoplastic resin may include a thermoplastic elastomer, thermoplastic polyurethane, thermoplastic polyisoprene, thermoplastic polyester, thermoplastic polyolefin, polyvinyl chloride, polystyrene, or a blend of two or more of these materials. Can be 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 copolymers of such copolymers. or a blend of two or more of 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 polyester include polyethylene vinyl acetate, polyacrylate or polymethacrylate, high molecular weight fatty acid ester, 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 onto a pre-formed mold that follows the shape of the body surface of the patient's 10 chest. Can be done. Further, it is preferable to use a plate or mesh-like body made of a thermoplastic resin with a low melting point such as poly-ε-caprolactone with a melting point of 60°C. By heating a plate or mesh-like body made of such a low melting point thermoplastic resin and adjusting the temperature to a temperature that allows it to be bent to a degree that can be processed and not cause burns, and then directly pressed against the chest of the patient 10. This is preferable since it is possible to obtain the fixing shell 14 that follows the shape of the body surface of the patient's 10 chest.

A fixing shell 14 that follows the shape of the body surface of the patient's 10 chest is attached to the chest of the patient 10, and its both ends are connected to connecting portions 15 that are fixed to each long side of the base plate 12. connected. The patient 10 is fixed at a predetermined position on the base plate 12 by the attached fixing shell 14, and deep breathing using the diaphragm is suppressed, and body movement of the chest due to deep breathing is suppressed.

As shown in FIG. 1, between the fixing shell 14 attached to the chest of the patient 10 and the body surface corresponding to the dovetail of the chest, the pressing force applied to the body surface by the fixing shell 14 is adjusted. A bag-shaped portion 16 of a first body movement restraining bag B (hereinafter referred to as bag B) is inserted as a pressure adjusting means. As shown in FIG. 1, a bag-shaped portion 16 smaller than the fixing shell 14 is provided, and a plate-shaped portion 17 is joined to the surface on the fixing shell 14 side. A front view of this bag B is shown in FIG. 2(a). The bag-like part 16 of the bag B has a hexagonal shape, and a plate-like part 17 that is harder than the bag-like part 16 and does not deform under the pressing force of the fixing shell 14 is joined to one side thereof. An air supply path 18 is drawn out from an offset position on one side of the bag-shaped portion 16. As shown in FIG. 2B, which is a cross-sectional view taken along line XX in FIG. , 16b are welded at both ends 16c, 16c with a width of 4 to 6 mm. Furthermore, as shown in FIG. 2(c), 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. As shown in FIG. 2(c), a tube 21 is inserted into the air supply path 18, and the other end of the tube 21 has a connector 20 connected to the air supply means. It is located near the entrance of No. 16. By inserting the tube 21 into the air supply path 18 in this way, even if a part of the air supply path 18 is caught between the fixation shell 14 and the patient 10 as shown in FIG. 16 can be reliably secured. The tube 21 is preferably made of a non-magnetic material that transmits radiation such as X-rays, for example, plastic such as polyvinyl chloride.

The fabrics 16a, 16b and fabrics 18a, 18b having gas barrier properties forming the bag-shaped portion 16 and the air supply path 18 are preferably made of a non-magnetic material that transmits radiation such as X-rays, and are made of polyester. Examples include fabrics made of vinyl chloride film or polyurethane film, fabrics made of elastic resin films such as elastomers, and fabrics that are laminated with multiple types of synthetic resin films such as polyester used for retort pouches and the like to provide gas barrier properties. can. In addition, 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 polyvinyl chloride or polyurethane on one side, or are laminated with a resin film to provide gas barrier properties. There may be. Since the fabrics 16a and 16b constitute the bag B and come into direct contact with the human body, they are preferably flexible, but as will be described later, the fabrics 16a and 16b may expand when air is supplied to the bag-shaped portion 16. Therefore, in consideration of the strength of the bag-shaped portion 16, it is preferable that the thickness of the fabrics 16a, 16b is approximately 0.1 to 1 mm. Note that the fabrics 18a and 18b constituting the air supply path 18 may be the same fabric as the fabrics 16a and 16b, or may be different fabrics, but since the same pressure as that of the bag-shaped portion 16 is applied, The thickness is preferably about 0.1 to 1 mm.

In the bag B shown in FIGS. 1 and 2(a), a plate-like part 17 that is harder and smaller than the bag-like part 16 is joined. The plate-shaped portion 17 shown in FIGS. 1 and 2(a) has a similar shape that is smaller than the hexagonal bag-shaped portion 16, and FIG. As shown in (b), it is joined to one side of the fabric 16a forming the bag-shaped portion 16. As shown in FIG. 3, which is a cross-sectional view of the plate portion 17, two plate bodies 17a and 17b are disposed facing each other. The plates 17a and 17b are made of a non-magnetic material that transmits radiation, such as a resin such as polyvinyl chloride, polystyrene, polyethylene, or polypropylene, or a foam thereof, and are harder than the bag-shaped portion 16 and are used for fixing. In order to prevent deformation due to the pressing force of the shell 14, the thickness is preferably about 3 to 10 mm.

As shown in FIG. 2(a), a strain sensor 19 serving as a load detection sensor for detecting a load is disposed at the center of the plate-like portion 17. This strain sensor 19 detects strain in the vertical direction, and a commercially available strain sensor can be used. As shown in FIG. 3, the strain sensor 19 is sandwiched between two plates 17a and 17b so that both sides of the sensor 19 are in contact with the opposing surfaces thereof, and the periphery thereof is surrounded by a cushion material 23 such as a sponge. . The cushion material 23 is bonded to the plates 17a and 17b using an adhesive, double-sided tape, adhesive tape, glue, or the like. A lead wire 25a having a connector 25b attached to the tip extends from the strain sensor 19, as shown in FIG. 2(a). According to such a plate-shaped portion 17, when a load is applied to the two plates 17a, 17b, the cushioning material 23 is compressed and the strain sensor 19 is compressed, and the strain sensor 19 is applied to the plates 17a, 17b. The applied load can be extracted as electrical signal data, and as shown in FIG. 1, the data is transmitted from the transmitter 27 to the receiver in the control room, and the load data can be displayed on the operation panel. This transmitter 27 may be replaced with a display device that displays load data. Further, the plate-shaped portion 17 and the fabric 16a, which are joined to one side of the fabric 16a forming the bag-shaped portion 16, can be bonded using a commercially available organic adhesive, double-sided tape, adhesive tape, glue, etc. can. Note that in place of the strain sensor 19, a commercially available piezoelectric sensor that detects vertical pressure as an electrical signal may be used.

As shown in FIG. 4, the pouch-shaped portion 16 of the bag B shown in FIG. The plate-shaped portion 17 is inserted between the body surface corresponding to the dovetail of the chest 10a and the fixing shell 14 so as to face the fixing shell 14 side. The plate-shaped portion 17 of the bag B inserted in this manner is inserted into the positioning recess 14a formed in advance in the fixing shell 14, as shown in FIG. The fixing shell 14 having such a positioning recess 14a can be fabricated by heating a plate or mesh-like body made of a low-melting thermoplastic resin such as poly-ε-caprolactone with a melting point of 60° C. After adjusting the temperature to a level that allows the bag to be bent to a certain degree and not cause burns, the bag-shaped portion 16 of the bag B shown in FIG. It is possible to obtain a positioning recess 14a that has a shape that follows the body surface shape of the chest 10a and is opened at a predetermined position on the inner surface side. The positioning recess 14a of the fixation shell 14 can position the bag B at a predetermined position when the fixation shell 14 and bag B are attached to a predetermined part of the patient 10 during another radiation treatment or examination. .

As shown in FIG. 4, the bag-shaped portion 16 of the bag B shown in FIG. Air is supplied from an air pump 24 as an air supply means connected to the connector 20 of the air supply path 18 extending to the connector 20 through a tube 28 to which a pressure gauge 26 is attached. The bag-like portion 16 supplied with air expands and applies a predetermined load to a predetermined location on the chest 10a, and also presses the plate-like portion 17 against the fixing shell 14 with the same load. The force with which the bag-shaped portion 16 presses the plate-shaped portion 17 against the fixing shell 14 compresses the strain sensor 19 and can be detected as a load.

In this way, the amount of air from the air pump 24 is adjusted while referring to the pressure in the bag-shaped portion 16 measured by the pressure gauge 26 so that the load detected by the strain sensor 19 becomes an appropriate value. As shown in FIG. 1, when the bag B is attached to the dovetail of the chest 10a and air is supplied to the pouch 16 from the air pump 24 to inflate the pouch 16 to suppress body movement due to breathing, the strain sensor The load applied to the dovetail can be detected at 19, and the breathing pattern of the patient 10 can be monitored by monitoring changes in the load over time. According to this monitor, it is possible to determine whether or not the deep breathing of the patient 10 using the diaphragm has been suppressed. An example is shown in FIG. In FIG. 5, when patient 10 was restrained from taking deep breaths using his diaphragm, the maximum load when the lungs expanded was 600 gf, and the minimum load when the lungs collapsed was 400 gf. The monitor shown in FIG. 5 is one in which the electrical signal from the strain sensor 19 is simply amplified.

The body shape of the patient 10 is deformed compared to when the fixation shell 14 was molded, and as shown in FIG. When the gap 22 is formed between them, the fixing shell 14 alone cannot apply a sufficient load to 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. 6(b), air is supplied from the air pump 24 (FIG. 1) into the bag-shaped part 16 via the air supply path 18 to inflate the bag-shaped part 16. By closing the gap 22, a predetermined load can be applied to the body surface corresponding to the dovetail of the chest 10a, and body movement due to breathing of the diaphragm can be suppressed. At this time, as shown in FIG. 4, the plate-like part 17 is inserted into the positioning recess 14a of the fixing shell 14 by the bulging pouch-like part 16, and the bulging pouch-like part 16 allows the plate-like part 17 to be accurately positioned on the chest 10a. A predetermined load can be applied to the body surface corresponding to the dovetail.

The bag B shown in FIG. 6 is inserted into the gap 22 between the body surface corresponding to the dovetail of the chest 10a of the patient 10 and the fixing shell 14, with the plate-like part 17 facing the fixing shell 14. When the body shape of the patient 10 is only slightly deformed, the plate-shaped portion 17 may be inserted into the gap 22 so as to be on the body surface side of the patient 10, as shown in FIG. 7(a). In this case, it is not necessary to form the positioning recess 14a in the fixing shell 14. As shown in FIG. 7(a), the bag-shaped part 16 inserted so that the plate-shaped part 17 faces the body surface side of the patient 10 is supplied with air from the air pump 24 (FIG. 1) via the air supply path 18. Once supplied and inflated, the plate-shaped portion 17 is pressed against the corresponding body surface of the patient 10 to correct the shape of the body surface, close the gap 22, and expand the patient 10 as shown in FIG. 7(b). A predetermined load can be applied to the body surface corresponding to the dovetail of the chest 10a. Although the strain sensor 19 described above detects compression in the vertical direction, it may also be a strain sensor that detects expansion and contraction in the horizontal direction. Such a strain sensor may be formed directly on one side of the bag-shaped portion 16.

The fixing shell 14 as a pressing member described so far covers the entire chest 10a of the patient 10, but the suppression of body movement due to breathing by the diaphragm can also be achieved by pressing only the dovetail part of the patient 10. Since this is possible, a pressing plate 30 that presses only the dovetail portion of the patient 10 can be used as a pressing member, as in the second body movement suppressing device shown in FIG. 8(a). The second body movement suppressing device shown in FIG. A screw punch 36 is screwed thereon as a pressure adjusting means, and a press plate 30 is attached to the tip of the screw punch 36. When the screw punch 36 is rotated by rotating the knob 38 attached to the rear end of the screw punch 36 in the left-right direction, the press plate 30 moves up and down, and presses the dovetail portion of the patient 10 placed on the base plate 12. The pressing force can be adjusted. A bag B serving as a second pressure adjusting means is inserted between the pressing plate 30 and the body surface of the patient 10 corresponding to the dovetail region. It is preferable that the bag B is inserted so that the plate-like portion 17 faces the pressing plate 30 side. In this case, it is preferable that the pressing plate 30 is formed with a recess 30a into which the plate-shaped portion 17 is inserted, as shown in the partial enlarged sectional view, so that the bag B can be pressed with the entire surface of the pressing plate 30. Alternatively, the bag B may be placed between the pressing plate 30 and the patient so that the plate-like portion 17 faces the patient's 10 body surface side. In this case, it is not necessary to form the recess 30a in the press plate 30 into which the plate-like part 17 is inserted.

In addition, when it is possible to suppress the body movement based on breathing by the diaphragm by pressing the dovetail part of the patient 10 only with the press plate 30, the first body movement suppressing device as shown in the third body movement suppressing device shown in FIG. The dovetail portion can be directly pressed with a pressing plate 30 attached to the tip of a screw punch 36 as a pressure adjusting means. In this case as well, by arranging the plate-like part 17 between the body surface of the patient 10 and the pressing plate 30, the strain sensor 19 of the plate-like part 17 can detect the load applied to the body surface of the dovetail part. By rotating the knob 38 in the left and right directions, an optimum load can be applied to the body surface of the dovetail portion. Note that the press plate 30, columns 32a, 32b, horizontal crosspiece 34, screw punch 36, and knob 38 shown in FIGS. 8(a) and 8(b) are made of a non-magnetic material that transmits radiation, such as resin.

FIG. 9 shows a fourth body movement suppressing device using a belt as a pressing member. In the fourth body movement suppressing device shown in FIG. 9(a), a belt 44 wrapped around a predetermined part of the patient 10 is used as a pressing member, and the belt 44 is connected to the body surface of the predetermined part of the patient 10. In between, a bag B is inserted, in which a plate-like part 17 on which a strain sensor 19 is arranged is joined to one side of the bag-like part 16. A hook-and-loop fastener 46 is provided at each end of the belt 44 as a pressure adjusting means, and by adjusting the length of the belt 44 wound around a predetermined part of the patient 20, pressure on the body surface of the predetermined part of the patient 10 can be adjusted. You can adjust the pressure. Furthermore, the pressing force of the belt 44 on the body surface can be adjusted by sucking and discharging air into the bag-shaped portion 16. Incidentally, if it is not necessary to adjust the pressing force of the belt 44 against the body surface by sucking and discharging air into the bag-shaped portion 16, a fifth body movement restraining device shown in FIG. Only the plate-shaped portion 17 provided with the strain sensor 19 may be inserted between the body surface of a predetermined region and the belt 44.

The plate-shaped portion 17 described above has a strain sensor 19 disposed at its center. In order to accurately arrange the strain sensor 19 in the center of the plate-shaped portion 17, a sensor recess 19a is previously formed in the center of the opposing surface of the plate 17b, as shown in FIG. 10(a). It is preferable to keep it. The recess 19a has such a depth that the front end surface of the strain sensor 19 that comes into contact with the opposing surface of the plate 17a protrudes from the surface of the plate 17b. Also in the plate-shaped portion 17 shown in FIG. 9, a cushioning material 23 such as a sponge is bonded with an adhesive or the like so as to surround the strain sensor 19 protruding from the recess 19a. Furthermore, the strain sensor 19 may be insert-molded with a resin 17c like the plate-shaped portion 17 shown in FIG. 10(b). Although the plate-shaped portion 17 was formed of a non-magnetic material that transmits radiation, the strain sensor 19 may be arranged as in the case where the radiation is irradiated from the side of the patient 10 shown in FIG. When the provided plate-shaped portion 17 is not substantially irradiated with radiation, the plate-shaped portion 17 may be formed of a radiation-impermeable material, such as a metal material or a ceramic material.

The bag B shown in FIGS. 1, 2, 4, and 6 to 9 is not provided with anything on the side of the bag-shaped portion 16 that directly contacts the body surface of the patient 10, and the body surface temperature of the patient 10 is When it is necessary to monitor body temperature and heartbeat, a body temperature sensor and a heartbeat sensor separate from the bag B are attached to the patient 10, and an examination using radiation and/or an examination is performed. In this regard, the second body movement restraining bag B ₂ (hereinafter referred to as bag B ₂ ) shown in FIG. 11 has a plate-like part 17 shown in FIG. A vital detection sensor 40 for detecting the heartbeat and/or body surface temperature of the patient 10 is provided on the fabric 16b of the bag-shaped portion 16 on the patient 10 side. When using this bag _B2 to suppress the body movements of the patient 10 and perform a radiation examination and/or examination, the patient 10 can be controlled without attaching a separate body temperature sensor or heart rate sensor to the patient 10. Vital data such as heart rate and/or body surface temperature can be monitored. Note that the explanation of the plate-like portion 17 and the like on the fabric 16a side of the bag _B2 is omitted because it overlaps with the explanation of FIG. 2.

In the vital detection sensor 40 shown in FIG. 11, a pair of U-shaped flexible electrodes 40a, 40a are formed on the surface of a fabric 16b, and the ends thereof are connected to a transmitter 40b. In the flexible electrode 40a, a conductive layer 41a made of conductive paste is bonded to a fabric 16b with an adhesive layer 41b. The conductive layer 41a directly contacts the body surface of the patient 10 to detect the body surface temperature or heartbeat, and the detected data is transmitted from the transmitter 40b to the receiver in the control room.

Although the bag-shaped portion 16 of the bag B described above has a hexagonal shape, it may have a quadrangular shape. Further, the air supply path 18 may also be drawn out from the center of the side of the bag-shaped portion 16, and the connector 25b may be formed on the side surface of the plate-shaped portion 17. Furthermore, the plate-like part 17 on which the strain sensor 19 is disposed may be formed to have a size equal to or larger than the pouch-like part 16 of the bag B, so that the load applied to the body surface of a predetermined region of the patient 10 can be further reduced. In order to grasp it accurately, the plate-like part 17 may be provided on both sides of the bag-like part 16.

INDUSTRIAL APPLICATION This invention can be effectively used to suppress a patient's body movement during an examination using radiation and/or radiation therapy.

B: first body movement suppression bag, _B2 : second body movement suppression bag, 10: patient, 10a: chest, 12: base plate, 14: fixing shell, 14a: positioning recess, 15: connecting part, 16: bag-like part, 16a, 16b, 18a, 18b: fabric, 16c: end of bag-like part 16, 17: plate-like part, 17a, 17b: plate body, 17c: resin, 18: air supply path, 18c : End of air supply path 18, 19: Strain sensor, 19a: Sensor recess, 20, 25b: Connector, 21, 28: Tube, 22: Gap, 23: Cushion material, 24: Air pump, 25a: Lead wire , 26: Pressure gauge, 27, 40b: Transmitter, 30: Pressing plate, 30a: Recess, 32a, 32b: Support column, 34: Horizontal beam, 36: Screw punch, 38: Knob, 40: Vital detection sensor, 40a: Flexible electrode, 41a: conductive layer, 41b: adhesive layer, 44: belt, 46: hook-and-loop fastener

Claims (9)

A member that is used for examination and/or treatment using radiation, is made of a radiation-transparent non-magnetic material, and suppresses body movement of a predetermined region of a patient, and presses the body surface corresponding to the predetermined region. parts and
A bag-like part made of a non-magnetic material that transmits radiation, inserted between the pressing member and the body surface, and a bag-like part that extends from the bag-like part so that the load applied to the body surface can be adjusted. a body movement restraining bag comprising an air supply path for supplying air to inflate the bag-like portion;
A plate-like part that is harder than the pouch-like part and which is joined to a surface of the pouch-like part on the pressing member side is configured to detect a load applied to the patient's body surface by the bulged pouch-like part. Equipped with a strain sensor or a piezoelectric sensor as a load detection sensor,
A body movement suppressing device, wherein the pressing member is formed with a positioning recess into which the plate-like portion and the strain sensor or the piezoelectric sensor are inserted when the bag-like portion is expanded. The body movement suppressing device according to claim 1, wherein the strain sensor or the piezoelectric sensor is provided on a plate-shaped portion larger than the strain sensor or the piezoelectric sensor. 3. A vital detection sensor for detecting the patient's breathing, heartbeat, and/or body surface temperature is provided on the patient-side surface of the pouch-shaped portion. Body movement restraint device. The body movement suppressing device according to any one of claims 1 to 3, wherein the bag-shaped portion is inserted into a gap created between the pressing member and the body surface of the patient. The body movement suppressing device according to any one of claims 1 to 4, wherein the bag-shaped portion is made of a flexible material so that it can be deformed along the body surface of the patient. The body according to any one of claims 1 to 5, characterized in that 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. dynamic suppression device. The pressing member is molded to follow the shape of a predetermined region of the patient, and is configured to fix the patient attached to the predetermined region at a predetermined position on a base plate and suppress body movement of the predetermined region. The body movement suppressing device according to any one of claims 1 to 6, characterized in that the fixing shell is made of thermoplastic resin and is connected to a connecting portion fixed to the base plate. Any one of claims 1 to 7, further comprising a monitor that amplifies an electrical signal from the strain sensor or the piezoelectric sensor to detect the load applied to the patient's body surface when the pouch-shaped portion swells. Body movement suppression device described in. A member that is used for examination and/or treatment using radiation, is made of a non-magnetic material that transmits radiation, and suppresses body movement of a predetermined region of a patient,
a pressing member that presses a body surface corresponding to the predetermined region, and a bag-shaped portion inserted between the body surface and the body surface;
An air supply path extending from the bag-like part and supplying air that inflates the bag-like part so that the load applied to the body surface can be adjusted, the bag comprising:
The bag-like part is provided at a position corresponding to the recess formed in the pressing member so as to be inserted into the recess and positioned when the bag-like part is expanded. body movement characterized in that a strain sensor or a piezoelectric sensor as a load detection sensor capable of detecting the load applied to the patient's body surface by the swollen pouch-like portion is provided on the plate-like portion that is harder than the pouch-like portion. restraint bag.

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