WO2009153832A1 - 治療台システム - Google Patents
治療台システム Download PDFInfo
- Publication number
- WO2009153832A1 WO2009153832A1 PCT/JP2008/001574 JP2008001574W WO2009153832A1 WO 2009153832 A1 WO2009153832 A1 WO 2009153832A1 JP 2008001574 W JP2008001574 W JP 2008001574W WO 2009153832 A1 WO2009153832 A1 WO 2009153832A1
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- WIPO (PCT)
- Prior art keywords
- treatment table
- particle beam
- treatment
- affected part
- isocenter
- Prior art date
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- 230000007246 mechanism Effects 0.000 claims abstract description 119
- 239000002245 particle Substances 0.000 claims abstract description 114
- 238000003745 diagnosis Methods 0.000 claims abstract description 48
- 238000002560 therapeutic procedure Methods 0.000 claims description 58
- 230000001225 therapeutic effect Effects 0.000 claims description 5
- 238000003384 imaging method Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0487—Motor-assisted positioning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/1061—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using an x-ray imaging system having a separate imaging source
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1085—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy characterised by the type of particles applied to the patient
- A61N2005/1087—Ions; Protons
Definitions
- the present invention relates to a treatment table system used in a particle beam treatment apparatus, and more particularly to a treatment table system that supports the use of the diagnosis of a three-dimensional diagnosis apparatus for particle beam treatment.
- radiotherapy using X-rays and gamma rays which is widely used as a treatment method, has a high amount of absorbed radiation regardless of the depth from the surface of the human body. Will also affect.
- particle beam therapy using proton beams or heavy ion beams has a characteristic that the amount of absorption reaches a peak at a certain depth from the surface of the human body. It is an effective treatment method that can be irradiated.
- the particle beam treatment device is a large device that irradiates the affected part with a charged particle beam emitted from a large accelerator at high energy. A port cannot be placed arbitrarily.
- a three-dimensional diagnostic apparatus typified by a CT apparatus for positioning diagnosis of an affected part having a three-dimensional shape
- the particle beam irradiation port is arranged so as not to interfere with a large three-dimensional diagnostic apparatus.
- Have difficulty For this reason, in order to use the diagnosis of the three-dimensional diagnostic apparatus for the particle beam therapy, after positioning the affected part on the treatment table of the three-dimensional diagnosis apparatus and making a treatment plan, the subject becomes the treatment table of the particle beam therapy apparatus. It was necessary to move up and position the affected area again to perform treatment, and the positioning accuracy was reduced.
- Conventional treatment table (bed) systems that perform positioning using a common bed without moving the subject to different treatment tables of a plurality of devices such as a diagnosis device and a treatment device include the following.
- This system includes a bed commonly used for a plurality of medical devices, means for supporting the bed so as to be movable in a one-dimensional direction, and controlling the movement of the bed only in the one-dimensional direction.
- the present invention has been made to solve the above-described problems, and can make it easy to position an affected area at an isocenter with high accuracy by utilizing the diagnosis of a three-dimensional diagnostic apparatus for particle beam therapy.
- the purpose is to provide a stand system.
- the treatment table system is a treatment table system for a particle beam therapy system that uses three-dimensional diagnosis for particle beam therapy in which a charged particle beam emitted from an accelerator is irradiated onto an affected area of a subject with high energy.
- the treatment table system includes a placement plate on which the subject is placed, and an affected portion that supports the placement plate and moves the placement plate to position the affected portion at an isocenter of the particle beam therapy system.
- the diseased part positioning mechanism is configured such that the treatment table at the diagnosis position of the three-dimensional diagnostic apparatus uses the isocenter of the three-dimensional diagnostic apparatus as a virtual isocenter of the particle beam therapeutic apparatus, and the particle beam irradiation port of the particle beam therapeutic apparatus Assuming particle beam therapy based on the position and the particle beam irradiation direction, the affected area is positioned at the virtual isocenter based on the image of the affected area by the three-dimensional diagnostic apparatus.
- the treatment table moving mechanism maintains the state of the mounting plate and the affected part positioning mechanism at the time of positioning when the affected part is positioned at the virtual isocenter, and moves the treatment part to the treatment position of the particle beam therapy system.
- the affected part is positioned at the isocenter of the particle beam therapy system.
- the treatment table is used for both the three-dimensional diagnosis and the particle beam treatment, and the treatment table is subjected to the particle beam treatment while maintaining the positioning of the affected part using the diagnosis result of the three-dimensional diagnosis apparatus.
- the affected part can be easily positioned with high accuracy at the isocenter of the particle beam therapy system simply by moving it to the position.
- FIG. 1 It is a figure which shows schematic structure of the treatment table system by Embodiment 1 of this invention in the time of a three-dimensional diagnosis, and the time of particle beam treatment. It is a figure which shows the structure of the accelerator used for the particle beam therapy by Embodiment 1 of this invention. It is a side view of the treatment table system shown in FIG. It is a figure explaining the affected part positioning mechanism of the treatment table system by Embodiment 1 of this invention. It is a figure explaining the structure and operation
- FIG. 1 (a) and 1 (b) are top views showing a schematic configuration of a treatment table system according to Embodiment 1 of the present invention. Moreover, the side view of the treatment table system shown to Fig.1 (a) and FIG.1 (b) is shown to Fig.2 (a) and FIG.2 (b).
- FIGS. 1 (a) and 2 (a) are diagrams in which the treatment table 5 is arranged at a three-dimensional diagnosis position, and FIGS. 1 (b) and 2 (b) show the treatment table 5 at the particle beam treatment position.
- FIG. 1 (a) and 2 (a) are diagrams in which the treatment table 5 is arranged at a three-dimensional diagnosis position
- FIGS. 1 (b) and 2 (b) show the treatment table 5 at the particle beam treatment position.
- the treatment table system includes a placement plate 2 on which a patient 1 as a subject is placed, and an affected part that supports the placement plate 2 and moves the placement plate 2 to position the affected part A.
- a treatment table 5 including a first affected part positioning mechanism 3 and a second affected part positioning mechanism 6 serving as a positioning mechanism, and a treatment table moving mechanism 4 disposed below the first affected part positioning mechanism 3 is provided.
- the control part (not shown) which controls the 1st, 2nd affected part positioning mechanism 3 and 6 and the treatment table moving mechanism 4 is provided.
- the first affected part positioning mechanism 3 includes a plurality of members 3a to 3c, supports the mounting plate 2, and has a major axis direction, a minor axis direction, a rotation direction about the major axis direction, and a minor axis direction as an axis.
- the mounting plate 2 is moved by the combination of the rotation directions described above, and the affected area A is positioned other than the vertical direction.
- the second affected part positioning mechanism 6 is composed of a support leg 6, and the support leg 6 moves up and down to move the mounting plate 2 in the up and down direction, thereby positioning the affected part A in the up and down direction.
- the treatment table moving mechanism 4 moves the treatment table 5 between the diagnosis position of the three-dimensional diagnosis device 16 and the treatment position of the particle beam treatment device, and is independent of the first and second affected part positioning mechanisms 3 and 6. Driven.
- the rotary table 4a and the pedestal 4b that is disposed on the rotary table 4a and rotates integrally with the rotary table 4a are configured.
- the treatment table moving mechanism 4 supports the first affected part positioning mechanism 3 below the first affected part positioning mechanism 3, and the treatment table moving mechanism 4, the first affected part positioning mechanism 3, and the mounting plate 2 are integrated.
- the treatment table 5 is moved by rotating to.
- the isocenter of the three-dimensional diagnostic apparatus 16 is used as the virtual isocenter 7 of the particle beam therapy apparatus.
- the affected area A is positioned at the virtual isocenter 7 by the first and second affected area positioning mechanisms 3 and 6.
- the three-dimensional diagnostic apparatus 16 is disposed at a position where it does not interfere with the irradiation port 9 including the particle beam irradiation port 9a of the particle beam therapy apparatus.
- the positioning of the affected area A to the virtual isocenter 7 assumes particle beam therapy, that is, a positioning operation necessary for particle beam therapy at the isocenter 8 of an actual particle beam therapy system. For this reason, the mounting plate 2 is moved on the assumption of the particle beam treatment based on the position of the particle beam irradiation port 9a and the particle beam irradiation direction in which the arrangement is determined, and not only the long axis direction, the short axis direction, and the vertical direction Positioning is performed including roll adjustment for moving in the rotation direction about the major axis direction and pitch adjustment for moving in the rotation direction about the minor axis direction.
- this virtual isocenter 7 is an isocenter of the three-dimensional diagnostic device 16
- positioning is performed based on the three-dimensional diagnostic image by the three-dimensional diagnostic device 16, and positioning is performed with high accuracy based on the three-dimensional shape of the affected area A. it can.
- FIGS. 3A, 3 ⁇ / b> B, and 3 ⁇ / b> C are side views from three directions for explaining the operation by the first affected part positioning mechanism 3.
- the member 3a of the first affected part positioning mechanism 3 performs roll adjustment (see FIG. 3A) and pitch adjustment (see FIG. 3B) with respect to the mounting plate 2.
- the member 3b moves the mounting plate 2 together with the member 3a in the long axis direction (see FIG. 3B), and the member 3c moves the mounting plate 2 together with the members 3a and 3b in the short axis direction (FIG. 3). (See (c)).
- the treatment table moving mechanism 4 maintains the state of the mounting plate 2 and the first and second affected part positioning mechanisms 3 and 6 at the time when the affected part A is positioned at the virtual isocenter 7 and moves the treatment table 5 to the particle. It moves to the treatment position of a line therapy apparatus, and will be in the state shown in FIG.1 (b) and FIG.2 (b). That is, the affected part A that has been at the position of the virtual isocenter 7 is moved to the position of the isocenter 8 of the particle beam therapy system and positioned at the isocenter 8.
- the movement of the treatment table 5 is a rotational movement that rotates by 180 degrees around the rotary shaft 10 passing through the intermediate point between the virtual isocenter 7 and the isocenter 8, and the center of the rotary table 4 a is on the rotary shaft 10.
- the support legs 6 arranged in the lower layer of the rotary table 4a are fixed without rotating, but are symmetrical with respect to the rotary shaft 10.
- the irradiation port 9 is close to the treatment table 5 for convenience, but is fixed to the treatment room wall surface at a position that does not hinder the rotation of the treatment table 6.
- the particle beam therapy apparatus When the affected area A is positioned at the isocenter 8 of the particle beam therapy apparatus, the particle beam therapy apparatus performs treatment by irradiating the affected area A with the particle beam from the particle beam irradiation port 9a.
- the main body of the particle beam therapy apparatus appropriately irradiates the affected area A with a large accelerator 20, a transport system that introduces a charged particle beam emitted from the accelerator 20 into the irradiation chamber, and a particle beam that is the supplied charged particle beam.
- An irradiation system is provided and a particle beam is irradiated from the irradiation port 9a.
- FIG. 2 is a diagram showing a schematic configuration of the accelerator 20.
- accelerated particles are extracted from the ion source 21 as a charged particle beam, accelerated to a certain energy using a linear accelerator 22, and then injected into a circular orbit from the incident device 23a.
- the charged particle beam passes through the acceleration cavity 24 every time it goes around the circular orbit, and is accelerated and energy is increased each time.
- the magnetic field is increased and adjusted so as to go around the same circular orbit.
- the energy is taken out of the circular track from the take-out device 23b.
- the first and second diseased part positioning mechanisms 3 and 6 are configured such that the isocenter of the three-dimensional diagnostic device 16 is replaced with the virtual isocenter 7 of the particle beam therapeutic device when the treatment table 5 is in the diagnostic position of the three-dimensional diagnostic device 16.
- the affected area A is positioned at the virtual isocenter 7 based on the image of the affected area A by the three-dimensional diagnostic device 16.
- This positioning operation includes not only the major axis direction, minor axis direction, and vertical direction, but also roll adjustment that moves in the rotation direction around the major axis direction, and pitch adjustment that moves in the rotation direction around the minor axis direction. It is positioned including.
- this positioning operation is performed based on the diagnostic image while performing the three-dimensional diagnosis by the three-dimensional diagnostic device 16, and can be positioned with high accuracy based on the three-dimensional shape of the affected part A.
- the three-dimensional diagnostic device 16 can be arranged without interfering with the irradiation port 9 of the particle beam therapy apparatus, and the affected part A can be positioned at the virtual isocenter 7 by applying to the existing particle beam therapy apparatus.
- the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6 at the time of positioning when the affected part A is positioned at the virtual isocenter 7, Move to the treatment position of the particle beam therapy system. Since the treatment table moving mechanism 4 is driven independently of the first and second affected part positioning mechanisms 3 and 6, when the treatment table 5 is moved by the treatment table moving mechanism 4, the mounting plate 2 and the first and second treatment plates 4 are moved. The affected part positioning mechanisms 3 and 6 can be maintained. Therefore, the treatment table 5 can not only maintain the positioning accuracy between the diagnosis position and the treatment position, but also at the diagnosis position, the treatment position, and further in the middle of movement, the mounting plate 2 and the first and second affected part positioning mechanisms.
- the treatment table 5 can be moved simply by rotating it 180 degrees on a two-dimensional plane, moving the affected area A at the position of the virtual isocenter 7 to the position of the isocenter 8 of the particle beam therapy system. And the effect of preventing the change in the body position of the subject 1 and the movement of the organ are enhanced.
- the treatment table moving mechanism 4 also has no change in the shape and the relative position in the treatment table 5 between the diagnosis position and the treatment position, whereby the treatment table 5 as a whole is located at the diagnosis position and the treatment position. There is no change in the state of deflection, deformation, etc., and the affected area A can be positioned with higher accuracy at the isocenter 8 of the particle beam therapy system.
- the isocenter of the three-dimensional diagnostic apparatus 16 is the virtual isocenter 7 of the particle beam therapy apparatus.
- the three-dimensional diagnostic apparatus 16 is movable, it is within the diagnosis possible range of the three-dimensional diagnostic apparatus 16.
- the 3D diagnostic apparatus 16 may be moved so that the isocenter of the 3D diagnostic apparatus 16 coincides with the virtual isocenter 7.
- position detection provided in the first and second affected part positioning mechanisms 3 and 6 optically using, for example, a laser pointer or the like.
- the position information of the isocenter 8 is recorded mechanically or electronically using a sensor.
- the treatment table 5 is arranged in the vicinity of the three-dimensional diagnosis device 16 by the treatment table moving mechanism 4, and the virtual isocenter 7 is within the diagnosis possible range of the three-dimensional diagnosis device 16 based on the recorded position information of the isocenter 8.
- the virtual isocenter 7 is set so that the isocenter 8 and the virtual isocenter 7 are symmetric with respect to the rotation axis 10 in the treatment table 5.
- FIG. Hereinafter, a treatment table system according to Embodiment 2 of the present invention will be described with reference to FIGS.
- the second embodiment is different from the first embodiment in the treatment table moving mechanism 4.
- the mounting plate 2 and the first affected part positioning mechanism 3 are the same as those in the first embodiment.
- the first affected part positioning mechanism 3 supports the mounting plate 2 and has a long axis direction and a short axis.
- the placement plate 2 is moved by a combination of the direction, the rotation direction with the major axis direction as the axis, and the rotation direction with the minor axis direction as the axis, thereby positioning the affected part A other than the vertical direction. Note that the placement plate 2 and the first affected part positioning mechanism 3 are simply illustrated for convenience.
- the second affected part positioning mechanism 6a including the support leg 6a has the same function as that of the first embodiment in that the affected part A is moved in the vertical direction by vertically extending and contracting, and the affected part A is positioned in the vertical direction. There is a wide structure.
- the treatment table moving mechanism 4 supports the first affected part positioning mechanism 3 below the first affected part positioning mechanism 3, and is driven independently of the first and second affected part positioning mechanisms 3 and 6a.
- the treatment table 5 is moved while maintaining the state of 6a.
- 5 (a) and 5 (b) are diagrams in which the treatment table 5 is arranged at a three-dimensional diagnosis position, and FIGS. 8 (a) and 8 (b) show the treatment table 5 at the particle beam treatment position.
- the treatment table 5 moves from the three-dimensional diagnosis position to the particle beam treatment position.
- the stage in the middle of doing is illustrated.
- 5 (a), 6 (a), 7 (a), and 8 (a) are top views
- FIG. 5 (b), FIG. 6 (b), FIG. 7 (b), and FIG. 8 (b) and FIG. 8 (c) are side views.
- the treatment table moving mechanism 4 is constituted by a plurality of members 4c to 4f arranged hierarchically in the height direction.
- the member 4c is disposed on the support leg 6a to support the upper layer members 4d to 4f, and does not move itself.
- the isocenter of the three-dimensional diagnostic apparatus 16 is used as the virtual isocenter 7 of the particle beam therapy apparatus.
- the affected area A is positioned at the virtual isocenter 7 by the first and second affected area positioning mechanisms 3 and 6a.
- the state shown in the figure is a state in which, after the affected part A is positioned at the virtual isocenter 7, the three-dimensional diagnostic device 16 is retracted to the rear position for the movement of the treatment table 5.
- the treatment table moving mechanism 4 holds the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 5 is illustrated. 6 (a) and move as shown in FIG. 6 (b). At this time, due to the member 4f of the treatment table moving mechanism 4 disposed on the bottom surface of the first affected part positioning mechanism 3, the mounting plate 2, the first affected part positioning mechanism 3 and the member 4f are integrated in the right direction in the figure. Move to. Thereby, the dimension of the major axis direction of the whole treatment table 5 reduces.
- the member 4f may be provided on the upper surface side of the lower member 4e. In this case, the mounting plate 2 and the first affected part positioning mechanism 3 may be moved integrally by driving the member 4f. .
- the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 7 is moved. Further, as shown in FIG. 7A and FIG. At this time, the member 4e of the treatment table moving mechanism 4 is rotationally driven, and the placement plate 2, the first affected part positioning mechanism 3, and the members 4f and 4e are integrally rotated 180 degrees around the rotation shaft 11. The movement by this rotation can be performed without interfering with the irradiation port 9 because the radius in the major axis direction of the entire treatment table 5 is reduced in the previous stage, so that the rotation radius becomes small.
- the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 7 is moved. Further, as shown in FIG. At this time, due to the member 4f of the treatment table moving mechanism 4 disposed on the bottom surface of the first affected part positioning mechanism 3, the mounting plate 2, the first affected part positioning mechanism 3 and the member 4f are integrated in the right direction in the figure. Move to. This movement is relatively equivalent to the operation of restoring the movement shown in FIGS. 6 (a) and 6 (b).
- the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time when the affected part A is positioned at the virtual isocenter 7, and the treatment table 7 is moved. Further, as shown in FIG. 8A and FIG. At this time, the mounting plate 2, the first affected part positioning mechanism 3, and the members 4f, 4e, and 4d are integrally moved rightward in the drawing by the member 4d of the treatment table moving mechanism 4. Then, the affected area A is moved to the position of the isocenter 8 of the particle beam therapy system and positioned at the isocenter 8.
- the treatment table moving mechanism 4 is in a stage where the members 4d to 4f are sequentially driven by independent driving and the treatment table 5 is moving from the three-dimensional diagnostic position to the particle beam treatment position. , Change the overall shape. Then, when the treatment table 5 reaches the particle beam treatment position, that is, when the affected part A is moved to the position of the isocenter 8 of the particle beam treatment apparatus, the shape of the treatment table moving mechanism 4 and the treatment table 5 The relative position is equivalent to the time when the affected part A is positioned at the virtual isocenter 7. For this reason, as described above, the degree of freedom of movement is increased, for example, the rotational radius can be reduced during rotational movement, and the degree of freedom in design is improved.
- the treatment table moving mechanism 4 maintains the state of the placement plate 2 and the first and second affected part positioning mechanisms 3 and 6a at the time of positioning when the affected part A is positioned at the virtual isocenter 7 as in the first embodiment. Then, the treatment table 5 is moved to the treatment position of the particle beam treatment apparatus. Since the treatment table moving mechanism 4 is driven independently of the first and second affected part positioning mechanisms 3 and 6a, the placement plate 2 and the first and second plates are moved when the treatment table 5 is moved by the treatment table moving mechanism 4. The affected part positioning mechanisms 3 and 6a can be maintained. Therefore, the treatment table 5 can not only maintain the positioning accuracy between the diagnosis position and the treatment position, but also at the diagnosis position, the treatment position, and further in the middle of movement, the mounting plate 2 and the first and second affected part positioning mechanisms.
- the state of the treatment table 5 at the particle beam treatment position and the three-dimensional diagnosis position is 180 degrees rotationally symmetric with respect to the center of the support leg 6a as an equivalent state.
- the treatment table 5 as a whole can be positioned with high accuracy in the isocenter 8 of the particle beam therapy system without any change in the state of deflection or deformation between the diagnosis position and the treatment position.
- the members (support leg 6a, member 4c) that do not move in the treatment table 5 are configured symmetrically with respect to the axis of movement.
- the treatment table 5 is 180-degree rotationally symmetric with respect to the center of the support leg 6a, and thus has a symmetrical shape with respect to the axis.
- Embodiment 3 Since the arrangement of the three-dimensional diagnostic apparatus 16 is restricted by the shape and size of the particle beam treatment room, the case where the arrangement of the three-dimensional diagnostic apparatus 16 is different from the first and second embodiments will be described below.
- the third embodiment is different from the first and second embodiments in the configuration of each part in the treatment table moving mechanism 4, but the shape and operation of each part of the treatment table moving mechanism 4 are omitted for the sake of convenience, and the entire treatment table 5 is provided.
- the movement will be described with reference to FIGS. 9A to 9C.
- 9A is a top view in which the treatment table 5 is arranged at the three-dimensional diagnosis position
- FIG. 9C is a top view in which the treatment table 5 is arranged at the particle beam treatment position.
- FIG. 9B shows a stage in the middle of the treatment table 5 moving from the three-dimensional diagnosis position to the particle beam treatment position.
- FIG. 9 (a) there is a treatment table 5 at the diagnosis position of the three-dimensional diagnosis device 16 arranged opposite to the particle beam irradiation port 9.
- the isocenter of the three-dimensional diagnostic device 16 is used as the virtual isocenter 7 of the particle beam therapy system, and the affected part A is positioned at the virtual isocenter 7 by the first and second affected part positioning mechanisms 3 and 6 (6a).
- the treatment table 5 is rotated 90 degrees clockwise around the position of the isocenter 8 of the particle beam treatment apparatus, and the state shown in FIG. 9B is obtained.
- the treatment table 5 moves, it is assumed that the three-dimensional diagnostic device 16 is retracted backward so as not to prevent the movement of the treatment table 5.
- the treatment table 5 is rotated by 180 degrees around the rotation axis 10 passing through the intermediate point between the affected area A and the isocenter 8, and the state shown in FIG. 9C is obtained.
- the affected area A is moved to the position of the isocenter 8 of the particle beam therapy system and positioned at the isocenter 8.
- the treatment table moving mechanism 4 (not shown) is in the state of the placement plate 2 and the affected part positioning mechanism at the time of positioning when the affected part A is positioned at the virtual isocenter 7 as in the first and second embodiments. And the treatment table 5 is moved to the treatment position of the particle beam treatment apparatus.
- the state of the treatment table moving mechanism 4 at the time when the affected area A is moved to the position of the isocenter 8 of the particle beam therapy system is set to be equivalent to the time when the affected area A is positioned at the virtual isocenter 7. For this reason, as in the first and second embodiments, the entire treatment table 5 has no change in the state of deflection, deformation, etc. between the diagnosis position and the treatment position, and the affected area A is isolated from the isocenter 8 of the particle beam therapy system. Can be positioned with high accuracy.
- a rail 14 for translating the entire treatment table 1 may be laid on the floor of the treatment room.
- the treatment table 5 is moved to the treatment position of the particle beam treatment apparatus by translating on the rail 14.
- the support leg 6 (6a) is used to support from the bottom.
- the support leg 6 (6a) may be supported by being suspended from the upper layer.
- the treatment table moving mechanism 4 does not change to move the treatment table 5 while supporting the first affected part positioning mechanism 3 in the lower layer of the first affected part positioning mechanism 3. 2, the entire treatment table 5 does not change in the state of deflection or deformation at the diagnosis position and the treatment position, and the affected area A can be positioned with high accuracy at the isocenter 8 of the particle beam treatment apparatus.
- the treatment table 5 is moved and positioned at the isocenter 8 of the particle beam therapy system.
- the affected area is determined based on the previous positioning information.
- A may be positioned at the isocenter 8.
- a means for holding the positioning information of the affected part positioning mechanisms 3 and 6 (6a) is provided, and positioning is performed on the isocenter 8 using the previously held positioning information.
- the positioning of the affected area A is corrected by the affected area positioning mechanisms 3 and 6 (6a) on the basis of an image obtained by an X-ray imaging apparatus which is a diagnostic apparatus normally provided in the particle beam therapy system.
- ⁇ It can be used for particle beam therapy equipment with a small degree of freedom in the position of the irradiation port, such as a gantry type particle beam therapy system in which the irradiation port is fixed or only movable in the short axis.
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Abstract
Description
しかしながら、粒子線治療装置は大型の加速器から出射される荷電粒子ビームを高エネルギで患部に照射する大型装置で、照射系の関連機器配置は一義的に決定され、粒子線の照射口を備える照射ポートを任意に配置することができない。
このシステムは、複数の医用装置に共通に使用される寝台と、この寝台を3次元方向の1次元方向に移動可能に支持する手段と、寝台の移動をその1次元方向にのみ制御して被検体を複数の医用装置それぞれのアイソセンタに個別に位置決めする手段とを備える。そして、複数の医用装置それぞれのアイソセンタの、残り2次元それぞれの方向の位置は互いに同一に設定されている(例えば、特許文献1参照)。
以下、この発明の実施の形態1による治療台システムを図について説明する。図1(a)、図1(b)は、この発明の実施の形態1による治療台システムの概略構成を示した上面図である。また、図1(a)、図1(b)で示した治療台システムの側面図を図2(a)、図2(b)に示す。特に、図1(a)、図2(a)は治療台5を3次元診断位置に配置した図であり、図1(b)、図2(b)は治療台5を粒子線治療位置に配置した図である。
図に示すように、治療台システムは、被検体である患者1を載置する載置板2と、載置板2を支持すると共に載置板2を移動させて患部Aの位置決めをする患部位置決め機構となる第1の患部位置決め機構3および第2の患部位置決め機構6と、第1の患部位置決め機構3の下層に配置された治療台移動機構4とを備えた治療台5を備える。また、第1、第2の患部位置決め機構3、6および治療台移動機構4を制御する制御部(図示せず)を備える。
第1の患部位置決め機構3の部材3aは、載置板2に対し、ロール調整(図3(a)参照)と、ピッチ調整(図3(b)参照)とを行う。部材3bは、載置板2を部材3aと共に長軸方向に移動させ(図3(b)参照)、部材3cは、載置板2を部材3a、3bと共に短軸方向に移動させる(図3(c)参照)。
治療台5が移動する際、3次元診断装置16は、治療台5の移動を妨げないように後方に退避しているものとする。なお、図1(a)、図1(b)では、照射ポート9が便宜上治療台5に近接しているが、治療台6の回転を妨げない位置で治療室壁面に固定されている。
粒子線治療装置本体は、大型の加速器20と、加速器20から出射される荷電粒子ビームを照射室に導入する輸送系と、供給された荷電粒子ビームである粒子線を患部Aに適正に照射する照射系とを備えて、照射口9aから粒子線を照射する。図2は、加速器20の概略構成を示す図である。図に示すように、加速粒子をイオン源21から荷電粒子ビームとして取り出し、線形加速器22を使って、あるエネルギまで加速した後、入射装置23aから円形軌道に打ち込む。荷電粒子ビームは、円形軌道を周回するたびに加速空洞24を通過し、そのたびに加速されエネルギが増加していく。それに合わせて磁場も増加させ同じ円形軌道を周回するように調整する。そして、最高エネルギに達したとき、取り出し装置23bから円形軌道の外部へ取り出す。
この実施の形態による治療台システムでは、照射ポート9の位置合わせができない粒子線治療装置での粒子線治療を想定して、患部Aを仮想アイソセンタ7に位置決めするため、実際の粒子線治療装置のアイソセンタ8での粒子線治療時に必要な位置決め動作ができる。またこの位置決め動作は、3次元診断装置16による3次元診断を行いつつ、その診断画像に基づいて位置決めするもので、患部Aの3次元形状に基づいて高精度に位置決めできる。また、3次元診断装置16を粒子線治療装置の照射ポート9と干渉することなく配置可能となり、既設の粒子線治療装置にも適用して患部Aを仮想アイソセンタ7に位置決めできる。
この場合、治療台5を粒子線治療装置の治療位置に配置した状態で、例えばレーザポインタなどを用いて光学的に、あるいは第1、第2の患部位置決め機構3、6に備えられた位置検出センサを用いて、アイソセンタ8の位置情報を、機械的、あるいは電子的に記録する。そして、治療台移動機構4により3次元診断装置16の付近に治療台5を配置し、3次元診断装置16の診断可能範囲内に、上記記録されたアイソセンタ8の位置情報に基づいて仮想アイソセンタ7を設定する。この場合、アイソセンタ8と仮想アイソセンタ7とが、治療台5内の回転軸10に対して対称となるように仮想アイソセンタ7を設定する。
以下、この発明の実施の形態2による治療台システムについて図5~図8に基づいて説明する。
この実施の形態2は、上記実施の形態1と治療台移動機構4が異なる。また、載置板2および第1の患部位置決め機構3は、上記実施の形態1と同様であり、第1の患部位置決め機構3は、載置板2を支持すると共に、長軸方向、短軸方向、長軸方向を軸とした回転方向、および短軸方向を軸とした回転方向の組み合わせにより載置板2を移動させて患部Aの上下方向以外の位置決めをする。なお、載置板2および第1の患部位置決め機構3は、便宜上簡便に図示している。
支持脚6aから成る第2の患部位置決め機構6aは、上下に伸縮することにより載置板2を上下方向に移動させて、患部Aの上下方向の位置決めする機能は上記実施の形態1と同様であるが、幅広の構造となっている。
なお、図5(a)、図5(b)は治療台5を3次元診断位置に配置した図であり、図8(a)、図8(b)は治療台5を粒子線治療位置に配置した図である。また、図6(a)、図6(b)および図7(a)、図7(b)、さらに図8(c)は、治療台5が、3次元診断位置から粒子線治療位置に移動する途中の段階を図示したものである。また、図5(a)、図6(a)、図7(a)、図8(a)は上面図であり、図5(b)、図6(b)、図7(b)、図8(b)、図8(c)は側面図である。
図に示すように、治療台移動機構4は複数部材4c~4fが高さ方向に階層的に配置されて構成される。なお、部材4cは、支持脚6a上に配置されて上層部材4d~4fを支持し、これ自体は移動しない。
そして、図5、図8に示すように、粒子線治療位置と3次元診断位置との治療台5の状態は、支持脚6aの中央を軸として180度回転対称で同等の状態となる。これにより治療台5全体が、診断位置と治療位置とで、たわみ、変形などの状態にも変化がなく、患部Aを粒子線治療装置のアイソセンタ8に高精度に位置決めできる。
粒子線治療室の形状や大きさにより、3次元診断装置16の配置は制約されるため、上記実施の形態1、2と、3次元診断装置16の配置が異なる場合を以下に示す。
この実施の形態3は、上記実施の形態1、2と治療台移動機構4内の各部の構成が異なるが、治療台移動機構4の各部の形状や動作は、便宜上省略し、治療台5全体の移動の様子を図9(a)~図9(c)に基づいて説明する。
なお、図9(a)は治療台5を3次元診断位置に配置した上面図であり、図9(c)は治療台5を粒子線治療位置に配置した上面図である。また、図9(b)は、治療台5が、3次元診断位置から粒子線治療位置に移動する途中の段階を図示したものである。
次に、上記実施の形態1と同様に、患部Aとアイソセンタ8との中間点を通る回転軸10を中心に、治療台5は180度回転され、図9(c)に示す状態となる。これにより、患部Aは、粒子線治療装置のアイソセンタ8の位置に移動され、アイソセンタ8に位置決めされる。
Claims (10)
- 加速器から出射される荷電粒子ビームを高エネルギで被検体の患部に照射する粒子線治療に3次元診断を利用する粒子線治療装置の治療台システムにおいて、
上記被検体を載置する載置板と、
上記載置板を支持すると共に上記載置板を移動させることにより、上記患部を上記粒子線治療装置のアイソセンタに位置決めする患部位置決め機構と、
上記患部位置決め機構および上記載置板を備えた治療台を、3次元診断装置の診断位置と上記粒子線治療装置の治療位置との間で移動させる治療台移動機構とを備え、
上記患部位置決め機構は、上記治療台が上記3次元診断装置の診断位置において、上記3次元診断装置のアイソセンタを上記粒子線治療装置の仮想アイソセンタとして、上記粒子線治療装置の粒子線照射口の位置および粒子線照射方向に基づく粒子線治療を想定し、上記3次元診断装置による上記患部の画像に基づいて、上記患部を上記仮想アイソセンタに位置決めし、
上記治療台移動機構は、上記患部が上記仮想アイソセンタに位置決めされる位置決め時点の上記載置板および上記患部位置決め機構の状態を保持して、上記粒子線治療装置の治療位置に移動させることで上記患部を上記粒子線治療装置のアイソセンタに位置決めすることを特徴とする治療台システム。 - 上記患部位置決め機構を複数の部材で構成し、該各部材を駆動して、上記載置板を、長軸方向、短軸方向、上下方向、長軸方向を軸とした回転方向、および短軸方向を軸とした回転方向の組み合わせにより移動させることにより、上記患部を上記粒子線治療装置のアイソセンタあるいは上記仮想アイソセンタに位置決めすることを特徴とする請求項1に記載の治療台システム。
- 上記患部位置決め機構と上記治療台移動機構とは、互いに独立して駆動されることを特徴とする請求項1に記載の治療台システム。
- 上記治療台移動機構は、上記治療台の高さを保持して2次元で移動させるもので、上記患部位置決め機構は、該患部位置決め機構の内、上下方向以外に駆動される部材は、上記治療台移動機構の上層に配置することを特徴とする請求項2に記載の治療台システム。
- 上記治療台移動機構は、上記粒子線治療装置の治療位置での状態を、上記位置決め時点での状態と同等にすることを特徴とする請求項1~4のいずれか1項に記載の治療台システム。
- 上記治療台移動機構の状態とは、その形状、および上記治療台に基づく相対的位置であることを特徴とする請求項5に記載の治療台システム。
- 上記治療台移動機構は、それぞれ所定方向に互いに独立して駆動される複数部材を階層的に配置して備え、該各部材を順次駆動して状態を変化させた後、復帰させることを特徴とする請求項5に記載の治療台システム。
- 上記治療台移動機構の上記複数部材は、並進駆動される部材と回転駆動される部材とを含むことを特徴とする請求項7に記載の治療台システム。
- 上記3次元診断装置による診断可能範囲内に上記仮想アイソセンタを設定する手段を備え、上記患部の画像は、上記3次元診断装置のアイソセンタを上記仮想アイソセンタに重ねて行う診断画像であることを特徴とする請求項1~4のいずれか1項に記載の治療台システム。
- 上記患部位置決め機構は、X線撮像装置による上記患部の画像に基づいて該患部を上記粒子線治療装置のアイソセンタに位置決めすることを可能とし、上記患部位置決め機構の位置決め情報を保持する手段を備え、上記治療台が記粒子線治療装置の治療位置において、上記保持した位置決め情報に基づいて上記患部を上記粒子線治療装置のアイソセンタに位置決めした後、上記X線撮像装置による上記患部の画像に基づいて上記患部の位置決めを補正することを特徴とする請求項1~4のいずれか1項に記載の治療台システム。
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CN114053598A (zh) * | 2020-08-06 | 2022-02-18 | 西安大医集团股份有限公司 | 虚拟等中心点标定方法、激光灯校准方法、放射治疗系统 |
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JPWO2009153832A1 (ja) | 2011-11-17 |
US20110121197A1 (en) | 2011-05-26 |
CN102065952B (zh) | 2014-04-02 |
US8550711B2 (en) | 2013-10-08 |
CN102065952A (zh) | 2011-05-18 |
JP4695231B2 (ja) | 2011-06-08 |
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