JP2009207524A - Radiotherapy table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately determine a position to be irradiated and to accurately perform the radiation irradiation by an X-ray equipment without moving a treatment table body. <P>SOLUTION: The radiotherapy table includes a turn table 2, a first yawing mechanism 1 for turning the turn table within a horizontal plane; a second yawing mechanism 3 for turning a first support member 4 supported at an appropriate position of the turn table within a horizontal plane; a third yawing mechanism 5 for turning a second support member 6 supported at the other end of the first support member 4 within a horizontal plane; a first pitching mechanism 7 supported by the second support member 6 for turning a third support member 8 in the vertical direction; a rolling mechanism 9 supported by the third support member 8 for turning a fourth support member 12; a second pitching mechanism 11 supported by the fourth support member 12 for turning a fifth support member 15; and a fourth yawing mechanism 13 supported by the fifth support member attached to the lower surface of an end in the longitudinal direction of a top panel 14 on which a patient is mounted, and connected to the second pitching mechanism 11 for turning the top panel 14 within a horizontal plane. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radiation therapy treatment table capable of radiation irradiation scheduled positioning and radiation irradiation.

  In the treatment by radiation irradiation, the affected part to be irradiated is photographed with a X-ray CT apparatus, X-ray fluoroscopy apparatus or the like, and a moving image or a still image is taken. After confirming and determining the position of the affected part, radiation irradiation is generally performed. In addition, since there is a spatial interference between devices in a radiation therapy treatment table, it is necessary to move the treatment table to a radiation irradiation treatment table posture after imaging with an X-ray CT apparatus or a fluoroscope.

By the way, as such a conventional therapeutic table for radiation therapy, a therapeutic table having a plurality of degrees of freedom is installed on a rotating mechanism (turn table) installed on the floor surface immediately below the radiation beam line. There are some (see, for example, Patent Document 1).
JP2003-205045

  However, in the above-mentioned treatment table for radiotherapy, even if the irradiation object is seen through with high accuracy and the irradiation scheduled positioning is performed with an X-ray CT apparatus or an X-ray fluoroscopy apparatus, the treatment table remains in the posture of the radiation irradiation apparatus. Therefore, there has been a problem that the actual irradiation position is shifted from the planned irradiation position due to the positioning error of the treatment table.

  The present invention has been made to solve the above-described problems, and is intended for radiation therapy capable of performing irradiation scheduled positioning and radiation irradiation with high precision by using an X-ray fluoroscopy device without moving a treatment table main body. The purpose is to provide a treatment table.

  In order to achieve the above object, the present invention constitutes a treatment table for radiation therapy by the following means.

(1) The present invention provides a turntable rotatably installed on a floor surface of a planned location in a treatment room, a first yaw rotation mechanism that rotates the turntable in a horizontal plane, and an appropriate position of the turntable. A second yaw rotation mechanism for rotating the first support member, one end of which is supported in the horizontal plane, into the horizontal plane, and the second support member supported by the other end of the first support member, in the horizontal plane. A third yaw rotation mechanism that rotates and a third support member that is supported by the second support member and that is perpendicular to the rotation axis in a direction orthogonal to the rotation axis of the third yaw rotation mechanism. A first pitch rotation mechanism that rotates in the vertical direction, and a fourth support that is supported by the third support member and that has a rotation axis that is orthogonal to the rotation axis of the first pitch rotation mechanism. A roll rotation mechanism for rotating the member, and the fourth support member. A second pitch rotation mechanism that rotates the fifth support member around a rotation axis in a direction orthogonal to the rotation axis of the roll rotation mechanism on the same plane, and a length of the top plate on which the patient rides A fourth yaw rotation mechanism that is supported by a fifth support member that is attached to the lower surface of the direction end portion, is connected to the second pitch rotation mechanism, and rotates the top plate in a horizontal plane.

(2) The present invention provides a turntable rotatably installed on a floor surface at a planned location in a treatment room, a first yaw rotation mechanism that rotates the turntable in a horizontal plane, and an appropriate position of the turntable. A third yaw rotation mechanism that rotates the second support member supported by the second rotation member in a horizontal plane, and a direction that is supported by the second support member and that is orthogonal to the rotation axis of the third yaw rotation mechanism A first pitch rotation mechanism for rotating the third support member in the vertical vertical direction about the rotation axis of the first rotation mechanism, and a rotation axis of the first pitch rotation mechanism supported by the third support member. A roll rotation mechanism that rotates the fourth support member around a rotation axis in the orthogonal direction, and a direction that is supported by the fourth support member and that is orthogonal to the rotation axis of the roll rotation mechanism on the same plane. Rotate the fifth support member around the rotation axis A second pitch rotation mechanism that is supported by a fifth support member attached to the lower surface of the longitudinal end of the top board on which the patient rides, and is connected to the second pitch rotation mechanism to place the top board in a horizontal plane. And a fourth yaw rotation mechanism that rotates inward.

  According to the present invention, irradiation planned positioning and radiation irradiation by the X-ray fluoroscopic apparatus can be performed easily and easily with high accuracy without moving the treatment table body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1A and 1B show a first embodiment of a treatment table for radiotherapy according to the present invention, where FIG. 1A is a plan view and FIG. 1B is a side view. FIG. 2 is a perspective view of the same embodiment.

  1 (a), (b) and FIG. 2, reference numeral 1 denotes a turntable 2 rotatably installed on a table base embedded in a floor surface at a planned location in a treatment room by means of a motor M1. 1 axis) A first yaw rotation mechanism that rotates in a horizontal plane immediately above the floor surface around S1, 3 is supported at one end of the first support member 4 at an appropriate position on the upper surface (or lower surface) of the turntable 2. The second yaw rotation mechanism 5 for rotating the first support member 4 in the horizontal plane around the rotation axis (second axis) S2 by the motor M2 is supported by the other end of the first support member 4. This is a third yaw rotation mechanism that rotates the second support member 6 in the horizontal plane about the rotation axis (third axis) S3 by a motor (not shown).

  Reference numeral 7 is supported by the second support member 6 and is driven by a motor (not shown) around a rotation axis (fourth axis) S4 in a direction orthogonal to the rotation axis (third axis) of the third yaw rotation mechanism. 3 is a first pitch rotation mechanism that rotates the support members 8 in the vertical vertical direction.

  Further, 9 is supported by the third support member 8, and the fourth is centered on the rotation axis (fifth axis) S <b> 5 in the direction orthogonal to the rotation axis (fourth axis) of the first pitch rotation mechanism 7. It is a roll rotation mechanism that rotates the support member 10.

  Further, 11 is supported by the fourth support member 10 and is fifth around the rotation axis (sixth axis) S6 in the direction orthogonal to the rotation axis (fifth axis) of the roll rotation mechanism 9 on the same plane. The second pitch rotation mechanism 13 for rotating the support member 12 is supported by a fifth support member 15 attached to the lower surface of the longitudinal end portion of the top plate 14 on which the patient rides. The fourth yaw rotation mechanism 13 is connected to the second pitch rotation mechanism 11 by a fourth yaw rotation mechanism that rotates the top plate 14 in the horizontal plane around the vertical rotation axis (seventh axis) S7. Has been.

  Here, the first yaw rotation mechanism 1, the second yaw rotation mechanism 3, and the third yaw rotation mechanism 5 of the turntable 2 are for changing the direction of the patient placed on the top board 14 over a wide range. The first pitch rotation mechanism 7 and the second pitch mechanism 11 are mechanisms for moving the top plate 14 up and down when getting on and off the patient. The roll rotation mechanism 9, the second pitch mechanism 11, and the fourth yaw rotation mechanism 13 are mechanisms for tilting the patient placed on the top plate 14 with respect to the beam with respect to all directions.

  Therefore, in the radiotherapy treatment table having such a configuration, the first yaw mechanism 1 makes the turntable 2 around the first axis S1, and the second yaw rotation mechanism 3 makes the first axis around the second axis S2. The support member 4 is further rotated by the third yaw rotation mechanism 5 around the third axis S3 into the horizontal plane immediately above the floor surface, whereby the first pitch rotation mechanism 7 is rotated. , The roll rotating mechanism 9, the second pitch rotating mechanism 11, and the fourth yaw rotating mechanism 13 are placed at arbitrary positions in a wide range without interfering with each support member passing through the radiation plane or the horizontal plane including the horizontal radiation beam line. Can be moved. Further, the mechanism does not enter the vertical radiation line passing path or the upper and lower sides of the radiation irradiation position, particularly the floor surface directly below the radiation irradiation position.

  According to the treatment table for radiation therapy having such a configuration, since there are seven degrees of freedom by each rotation mechanism consisting of the first axis to the seventh axis, the patient placed on the top plate at an arbitrary position in the space Positioning is possible. Moreover, the raising / lowering position of the patient to the top plate can be lowered by raising and lowering the top plate 14 by the first pitch rotating mechanism 7.

  FIGS. 3A and 3B show examples of postures when the top plate is raised and lowered and before examination or positioning, respectively, before radiation treatment in the radiotherapy treatment table of this embodiment.

  FIG. 3A shows a state in which the turntable 2, the first support member 4, and the second support member 6 are respectively rotated in a horizontal plane immediately above the floor surface and the top plate 14 is moved to a predetermined position. Then, when the top 14 is lowered with the first pitch rotating mechanism 7 and the second pitch rotating mechanism 11 in a horizontal state, and the top 14 is moved up and down with the patient on, FIG. ) Is a state where the top plate 14 on which the patient is placed is raised to a predetermined height, and then the examination and positioning of the affected part are performed by a doctor.

  In addition, since there is no device such as a rotating mechanism around the patient placed on the top board and directly below the focal position of the radiation beam, the radiation beam produced by the self-propelled CT imaging device as shown in FIGS. 4 (a) and 4 (b). CT imaging at the focal position is possible. In addition, since there is no treatment table device on the horizontal and vertical radiation beam line paths, X-ray imaging can be performed on the same axis of the horizontal and vertical beam lines.

  Therefore, irradiation can be performed without moving the treatment table after arbitrary positioning and positioning by an X-ray CT apparatus, an X-ray fluoroscopy apparatus, or the like.

  FIG. 4A shows a state during CT imaging, and FIG. 4B shows a state during radiation irradiation.

  Furthermore, since it has seven degrees of freedom, it is possible to rotate and position the patient around the point where the horizontal and vertical radiation beam lines intersect and the radiation isocenter.

  FIGS. 5A to 5E show examples of postures at the time of radiotherapy in the radiotherapy treatment table of this embodiment.

  FIG. 5A shows a state where the top plate 14 on which the patient is placed is rotated and the right side of the patient is aligned with the irradiation beam focus isocenter of the irradiation port P, and FIG. The top plate 14 on which the patient is placed is rotated so that the top of the patient is aligned with the irradiation beam focus isocenter of the irradiation port P. FIG. In this state, the patient's parietal portion is aligned with the irradiation beam focus isocenter of the irradiation port P.

  Furthermore, since most of the area under the top plate can be left without any mechanism, CT imaging of the patient's prostate can be performed as shown in FIGS. 5 (d) and 5 (e).

  FIG. 5D shows a state when the top plate 14 on which the patient is placed is rotated to align the right prostate of the patient with the irradiation beam focus isocenter of the irradiation port P. FIG. FIG. 6E shows a state where the top plate 14 on which the patient is placed is rotated and the left prostate of the patient is aligned with the irradiation beam focus isocenter of the irradiation port P. FIG.

  Further, conventionally, since the guide mechanism has an axis in the vertical direction, the pit depth is deep, or a large number of mechanisms occupy the space on the ground, but according to the present embodiment, the turntable 2 The pit depth can be reduced, and the floor and space occupied by equipment on the ground can be minimized.

  FIG. 6 is a perspective view showing a second embodiment of the treatment table for radiotherapy according to the present invention. The same parts as those in FIG. 1 and FIG. The part is described.

  In the second embodiment, as shown in FIG. 6, the fourth yaw rotation that rotates the top plate 14 in the horizontal plane about the rotation axis (seventh axis) S <b> 7 in the vertical direction with respect to the lower surface of the top plate 14. An attachment / detachment mechanism 16 is provided at the end of the fifth support member 15 that supports the mechanism 13, and the attachment / detachment mechanism 16 allows the fourth yaw mechanism 13 to be attached to and detached from the lower surface of the longitudinal end of the top plate 14 on which the patient rides. It is set as the structure to attach, About another structure, it is the same as that of 1st Embodiment.

  According to the radiation therapy treatment table having such a configuration, in addition to obtaining the same operational effects as those of the first embodiment, the top plate 14 can be arbitrarily attached to and detached from the treatment table. Work, for example, mounting of a patient on the top board 14 or fixation with a patient fixture can be performed in a place other than the radiotherapy room, and the occupation time in the radiotherapy room can be shortened. As a result, radiotherapy The number of patients treated in the room can be increased.

  In addition, the top plate 14 can be transported by an automatic cart, a manual cart, etc., and the top plate can be automatically coupled to the treatment table attaching / detaching mechanism 16 in the treatment room, thereby reducing the burden on nurses and doctors. Can do.

  Furthermore, by unifying the attaching / detaching portion of the attaching / detaching mechanism 16, a top plate having a different shape, for example, a chair-shaped top plate, a top plate to which various measuring devices are fixed, and the like can be mounted on the treatment table.

  7A and 7B show a third embodiment of the treatment table for radiotherapy according to the present invention. FIG. 7A is a plan view and FIG. 7B is a side view. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals and the description thereof is omitted, and different parts are described here.

  In the third embodiment, the first support member 4 supported at an appropriate position on the upper surface (or lower surface) of the turntable 2 shown in FIG. 1 and FIG. Without using the second yaw rotating mechanism 1 that rotates in the horizontal plane around the center, the second centered around the rotation axis (third axis) S3 by the motor M2 at an appropriate position on the upper surface (or lower surface) of the turntable 2. The third yaw rotation mechanism 5 for rotating the support member 6 in a horizontal plane is provided, and the configuration has six degrees of freedom.

  According to the radiotherapy treatment table having such a configuration, the first yaw rotation mechanism 1, the third yaw rotation mechanism 5, the first pitch rotation mechanism 7, the roll rotation mechanism 9, and the second pitch rotation mechanism 11. And since it has six degrees of freedom by the 4th yaw rotation mechanism 13, it becomes possible to position a patient in arbitrary positions in space. In addition, X-ray imaging can be performed on horizontal and vertical radiation beam line paths.

  In addition, since there is no arbitrary positioning and interference with the X-ray fluoroscope, radiation can be performed without moving the treatment table after positioning by the X-ray fluoroscope.

  Furthermore, the elevation position of the patient to the top plate can be lowered by raising and lowering the top plate 14 by the first pitch rotating mechanism 7.

  Further, conventionally, since the guide mechanism has an axis in the vertical direction, the pit depth is deep, or a large number of mechanisms occupy the space on the ground, but according to the present embodiment, the turntable 2 The pit depth can be reduced, and the floor and space occupied by equipment on the ground can be minimized.

  Furthermore, since most of the area under the top plate can be left without a mechanism, CT imaging of the patient's prostate can be performed.

  In the third embodiment, as described in the second embodiment, the top plate 12 is rotated in the horizontal plane around the rotation axis (seventh axis) S7 in the vertical direction with respect to the lower surface of the top plate 14. An attachment / detachment mechanism 16 is provided at the end of the support member 15 that supports the four yaw rotation mechanism 13, and the attachment / detachment mechanism 16 allows the fourth yaw mechanism 13 to be attached to and detached from the lower surface of the longitudinal end of the top plate 14 on which the patient is placed. It is good also as a structure attached to.

  In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

(A), (b) shows 1st Embodiment of the treatment table for radiotherapy by this invention, (a) is a top view, (b) is a side view. The perspective view of the embodiment. (A), (b) is a figure which shows an example of the attitude | position at the time of a ceiling-plate raising / lowering and a test | inspection or positioning before a radiation treatment in the radiation treatment treatment table of the embodiment. (A), (b) is a figure which shows the state at the time of CT imaging | photography and the state at the time of radiation irradiation in the treatment table for radiotherapy of the embodiment. (A)-(e) is a figure which shows an example of each attitude | position at the time of radiotherapy in the treatment table for radiotherapy of the embodiment. The perspective view which shows 2nd Embodiment of the treatment table for radiotherapy by this invention. (A), (b) shows 3rd Embodiment of the treatment table for radiotherapy by this invention, (a) is a top view, (b) is a side view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 1st yaw rotation mechanism, 2 ... Turntable, 3 ... 2nd yaw rotation mechanism, 4 ... 1st support member, 5 ... 3rd yaw rotation mechanism, 6 ... 2nd support member, 7 ... 1st pitch rotation mechanism, 8 ... 3rd support member, 9 ... Roll rotation mechanism, 10 ... 4th support member, 11 ... 2nd pitch rotation mechanism, 12 ... 5th support member, 13 ... 4th 14 ... Top plate, 15 ... Fifth support member, 16 ... Detachable mechanism

Claims (3)

A turntable rotatably installed on the floor of the planned location in the treatment room;
A first yaw rotation mechanism that rotates the turntable into a horizontal plane;
A second yaw rotation mechanism for rotating a first support member having one end supported at an appropriate position of the turntable into a horizontal plane;
A third yaw rotation mechanism for rotating the second support member supported by the other end of the first support member into a horizontal plane;
A first pitch rotation that is supported by the second support member and rotates the third support member in the vertical vertical direction about a rotation axis in a direction orthogonal to the rotation axis of the third yaw rotation mechanism. Mechanism,
A roll rotation mechanism that is supported by the third support member and rotates the fourth support member around a rotation axis in a direction orthogonal to the rotation axis of the first pitch rotation mechanism;
A second pitch rotation mechanism that is supported by the fourth support member and rotates the fifth support member around a rotation axis in a direction orthogonal to the rotation axis of the roll rotation mechanism on the same plane;
A fourth yaw supported by a fifth support member attached to the lower surface of the longitudinal end of the top board on which the patient rides and connected to the second pitch rotation mechanism to rotate the top board in a horizontal plane. A rotation mechanism;
A treatment table for radiation therapy, comprising: A turntable rotatably installed on the floor of the planned location in the treatment room;
A first yaw rotation mechanism that rotates the turntable into a horizontal plane;
A third yaw rotation mechanism for rotating the second support member supported at an appropriate position of the turntable into a horizontal plane;
A first pitch rotation that is supported by the second support member and rotates the third support member in the vertical vertical direction about a rotation axis in a direction orthogonal to the rotation axis of the third yaw rotation mechanism. Mechanism,
A roll rotation mechanism that is supported by the third support member and rotates the fourth support member around a rotation axis in a direction orthogonal to the rotation axis of the first pitch rotation mechanism;
A second pitch rotation mechanism that is supported by the fourth support member and rotates the fifth support member around a rotation axis in a direction orthogonal to the rotation axis of the roll rotation mechanism on the same plane;
A fourth yaw supported by a fifth support member attached to the lower surface of the longitudinal end of the top board on which the patient rides and connected to the second pitch rotation mechanism to rotate the top board in a horizontal plane. A rotation mechanism;
A treatment table for radiation therapy, comprising:   3. The radiotherapy treatment table according to claim 1, wherein an attachment / detachment mechanism is provided at an end of a fifth support member that supports the fourth yaw rotation mechanism, and the fourth yaw mechanism is provided by the attachment / detachment mechanism. A treatment table for radiation therapy, characterized in that it is configured to be detachably attached to the lower surface of the top plate.

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