JP2001129103A - Rotary irradiation room for corpuscular ray therapy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary irradiation room for corpuscular ray therapy having simple constitution and easy operation, which can horizontally hold the lower side of a moving floor without moving by synchronizing a guide rail on the side of a rotary drum in a direction reverse to a moving floor by the same quantity. SOLUTION: A guide rail supporting drum 5 provided with a guide rail 5a on the side of a rotary drum is arranged inside of the rotary drum 4 via a supporting roller 5c. An electric cylinder 7 for rod operation for operating an engaging rod 7a is arranged at the upper part of a fixed drum 2 provided with a guide rail on the side of the fixed drum. The rod 7a is inserted to an engaging bole 5d formed at a guide role supporting drum supporting member 5b supporting the roller 5c. In this constitution, even when the drum 4 and a corpuscular radiation part 3 are rotated and a moving floor 6 is moved in synchronization with the rotation of these, the lower side of the floor 6 can be kept to be horizontal by stopping the drum 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a rotary irradiation chamber for particle beam therapy, and more particularly to a technical field of a rotary irradiation chamber for particle beam therapy which has a simple structure and is easy to operate. .

[0002]

2. Description of the Related Art As is well known, cancer treatment has conventionally been carried out using X
Rays, gamma rays, electron beams or neutron rays have been used. However, in recent years, heavy ion beams such as carbon have been attracting attention due to the fact that it is possible to intensively irradiate only the affected area, and there is little adverse effect on normal cells surrounding the affected area. Also, the construction of a particle beam therapy facility is being promoted. The configuration of such a particle beam therapy facility is substantially the same as the configuration of the rotary irradiation room for radiation therapy disclosed in, for example, JP-A-11-47287.

[0003] Hereinafter, an outline of a rotary irradiation chamber for radiotherapy according to the above-mentioned conventional example will be described with reference to FIG. This will be described with reference numerals, regardless of the rotating position of the radiation irradiating unit that irradiates the cancer patient with radiation, always covers the inside of the rotating irradiation chamber and places a horizontal access floor (moving floor) below the treatment bed. It is possible to provide a sense of security to cancer patients by making it possible to form a floor. More specifically, the fixed-side ring rail 62 and the movable-side ring rail 72 that are arranged so as to sandwich the movement path of the radiation irradiation unit 22 form a lower-sided, horizontal, semi-cylindrical passage 80. A continuous moving floor 82 composed of a large number of plates flexibly connected by links is arranged, and the moving floor 82 is moved in synchronization with the rotation of the radiation irradiating section 22 and the moving side ring rail 72 is moved. It is configured to move by the same amount in the opposite direction to the floor 82.

[0004] As described above, in the rotating irradiation room for radiotherapy according to the conventional example having the above-described structure, when the movable floor 82 moves in synchronization with the rotation of the radiation irradiating section 22, the movable ring rail 72 moves. And move in the opposite direction by the same amount. Therefore, according to the rotation irradiation chamber for radiotherapy according to the conventional example, since the moving side ring rail 72 is kept in a stationary state, regardless of the rotation of the radiation irradiation unit 22, the moving floor 82
Can be kept horizontal. When an error occurs between the moving amount of the moving floor 82 and the moving amount of the moving side ring rail 72, the error of the moving amount is corrected.

[0005]

The rotary irradiation room for radiotherapy according to the conventional example described above is extremely useful because the lower side of the moving floor is always kept horizontal regardless of the rotational position of the radiation irradiation unit. it is conceivable that. However, in the case of the rotary irradiation room for radiotherapy according to this conventional example, as described above, the moving side ring rail is configured to move in synchronization with the moving floor in the opposite direction by the same amount, so that the In addition to the need for a driving means for moving the same amount in the opposite direction in synchronization with the rotation, a correction means for correcting an error in the moving amount is required, so that the configuration is complicated and the operation is difficult. In other words, despite the strong demand for a cheaper and easier-to-operate rotary irradiation room for radiotherapy, it has to be expensive, disadvantageous economically, and difficult to operate. There are issues to be solved.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to keep the rotating body-side ring rail stationary without providing a driving means for synchronizing and moving the rotating body-side ring rail in the opposite direction to the moving floor by the same amount. The object of the present invention is to provide a rotating irradiation chamber for particle beam therapy, which has a simple structure and is easy to operate.

[0007]

SUMMARY OF THE INVENTION According to the present invention, if the rotating body side guide rail is configured to be able to continue to be kept stationary regardless of the rotating position of the rotating body, the rotating body side ring rail can be moved. There is no need to provide drive means for moving the same amount in the opposite direction to the floor in synchronization with the floor, or to provide correction means for correcting errors in the amount of movement. Was made to be easier.

[0008] Therefore, in order to solve the above-mentioned problems, a feature of the means employed in the rotating irradiation chamber for particle beam therapy according to claim 1 of the present invention is that a fixed bed in which a treatment bed is disposed. A fixed torso-side guide rail is provided on the torso, and a rotating torso that supports a particle beam irradiation unit that rotates around the patient on the treatment bed is provided.A rotating torso-side guide rail is provided inside the rotating torso. The fixed cylinder side and the rotating cylinder side guide rail are provided, and the lower side is horizontal, and the irradiation chamber is formed together with the fixed cylinder and the guide rail support cylinder inside, and the particles are provided. In a rotating irradiation chamber for particle beam therapy, in which a bendable endless movable bed that operates in synchronization with the rotation of the X-ray irradiation unit is supported, an engaging portion is provided on the guide rail support body side, and the fixed body side is provided. Above There a guide rail supporting body at which is provided a locking means for the still engaged freely disengaging the engaging portion.

The feature of the means adopted by the rotating irradiation chamber for particle beam therapy according to the second aspect of the present invention is the first aspect.
In the rotary irradiation chamber for particle beam therapy described in the above, the engaging portion is an engaging hole, and the locking means is a telescopic device for inserting and removing a locking rod in the engaging hole.

The feature of the means adopted by the rotary irradiation chamber for particle beam therapy according to claim 3 of the present invention is that of claim 2.
In the rotary irradiation chamber for particle beam therapy described in (1), the engaging hole and a telescopic device for inserting and removing the locking rod are provided on both sides in the rotation direction of the particle beam irradiation unit.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rotary irradiation chamber for particle beam therapy according to a first embodiment of the present invention will be described with reference to FIG. 1 showing a longitudinal sectional view of a main part thereof and FIG. ) And FIG. 2 (a)
2 (b) of a cross-sectional view taken along the line BB of FIG. 2, FIG. 3 of a cross-sectional view of the movable floor and a guide rail support cylinder, and a view of a cross-sectional view of the movable floor and a support state of the rotary drum. Figure 4 of
FIG. 5A and FIG. 5A in an enlarged sectional view of a portion C in FIG.
This will be described with reference to FIG.

Reference numeral 1 shown in FIGS. 1, 3 and 4 denotes a rotary irradiation chamber for particle beam therapy according to the first embodiment. The rotating irradiation chamber 1 for particle beam therapy mainly includes a fixed drum 2 having one end side supported by a wall 100 of a building and a treatment bed 2c therein, and a rotating drum 4 supporting a particle beam irradiation unit 3;
A guide rail support cylinder 5 disposed inside the rotating cylinder 4 and on the fixed cylinder 2 side, and disposed between the fixed cylinder 2 and the guide rail support cylinder 5 and penetrated through the upper portion. And a bendable endless movable floor 6 that moves in accordance with the rotation of the particle beam irradiation unit 3.

More specifically, a guide rail 2b is laid along the longitudinal direction of the fixed barrel 2 on the horizontal floor inside the fixed barrel 2, and the guide rail 2b
And the treatment bed 2c is reciprocated. At the end of the fixed cylinder 2 on the side of the guide rail support cylinder 5, the lower side is horizontal and has an arc portion on the upper side.
A fixed body side guide rail (corresponding to a fixed side ring rail of a conventional example) 2a having a U-shaped vertical cross section having an opening on the side is provided.

On the outer periphery of the guide rail support cylinder 5, a guide rail support cylinder support member 5b provided with a plurality of support rollers 5c for rolling on the inner peripheral surface of the rotary drum 4 is provided. On the outer periphery of the end of the guide rail support cylinder 5,
A rotating body side guide rail (corresponding to a moving side ring rail of a conventional example) 5a having the same shape as the fixed body side guide rail 2a having an opening on the fixed body 2 side is provided. Further, on the fixed cylinder 2 side of the guide rail support cylinder support member 5b, engagement holes 5d as engagement sections are provided on both sides in the rotation direction of the particle beam irradiation section 3. Although the engagement holes 5d are circular, they may be irregular.

Further, as shown in FIGS. 1 and 4, a rotating body support ring 4a is provided on an outer periphery of an end portion of the rotating body 4 which is externally fitted to the fixed body 2. The outer peripheral surface of the ring 4a is supported by two support rollers 4b provided on a gantry, and the two support rollers 4b enable the rotary drum 4 to rotate smoothly. Have been.

An endless movable floor 6 having a horizontal lower part and an arcuate part on the upper side, which will be described later, is supported by the fixed body-side guide rail 2a and the rotating body-side guide rail 5a. ing. As shown in FIGS. 5 (a) and 5 (b), the movable floor 6 has a rubber belt 6a having a predetermined thickness forming a floor surface, the fixed body side guide rail 2a and the rotating body side guide at both ends. A carrier 6b comprising a rubber support beam member 6c having guide rollers 6d and 6d fitted and fitted to the rail 5a and having a rectangular section in longitudinal section.
Are fixed to the outer peripheral surface of the rubber belt 6a at predetermined intervals in the circumferential direction of the rubber belt 6a. In other words, the movable floor 6 can be guided and moved by the fixed trunk side guide rail 2a and the rotating trunk side guide rail 5a by the carrier 6b, and can support the weight of the human body. I have.

Further, as shown in FIGS. 2 (a) and 2 (b), a cylinder mounting base 7b is provided on the upper portion of the fixed body 2, and the cylinder mounting base 7b is provided with the engaging holes 5d and 5d. Each of the rods 5d is provided with a rod operating electric cylinder 7, which is a telescopic device that expands and contracts a locking rod 7a that is removably engaged. The locking rod 7a is
It is attached to two linear ways 7d that reciprocate while being guided by a linear rail 7c provided on the side of the cylinder mounting base 7b, and the locking rod 7a engages with the engaging hole 5d. The guide rail support cylinder 5 can be kept stationary at a fixed position even when the rotary cylinder 4 is rotated to rotate the particle beam irradiation unit 3 while maintaining a straight state. .

By the way, engaging holes 5d are provided at both sides in the rotation direction of the particle beam irradiation section 3, and a locking rod 7a which is removably engaged with each of the engaging holes 5d is expanded and contracted. The rod-operating electric cylinder 7 is provided because the locking rod 7a on the side that hinders the rotation of the particle beam irradiation unit 3 is reduced and pulled out from the engagement hole 5d, and the other locking rod 7a is used as a guide rail. This is for keeping the support cylinder 5 stationary. That is, the guide rail support cylinder 5 is configured to be stopped by one of the locking rods 7a.

The mode of use of the rotating irradiation chamber 1 for particle beam therapy according to the first embodiment will be described below.
In order to rotate the particle beam irradiation unit 3 in the left direction, the rod operating cylinder 7 on the left side is contracted to pull out the locking rod 7a from the engagement hole 5d and the rod operating cylinder 7 on the right side is rotated. The extension rod is extended, and the locking rod 7a is inserted into the engagement hole 5d.

The moving bed 6 moves to the left in synchronization with the rotation of the particle beam irradiation unit 3 to the left, but the locking rod 7 inserted into the right engaging hole 5d.
The function of a keeps the guide rail supporting cylinder 5 stationary, that is, the rotating trunk side guide rail 5a keeps stationary. Therefore, regardless of the rotational position of the particle beam irradiation unit 3, the moving bed 6
Will be kept horizontal. Of course, when the particle beam irradiation unit 3 is rotated in the right direction in FIG. 3, the locking rod 7a is pulled out from the right engagement hole 5d and locked in the left engagement hole 5d. What is necessary is just to insert the rod 7a.

According to the rotary irradiation chamber 1 for particle beam therapy according to the first embodiment, as described above, like the rotary irradiation chamber for radiotherapy according to the conventional example, the rotating body-side guide rail 5a has a movable floor. There is no need to provide a driving means for synchronously moving by the same amount in the direction opposite to the direction 6. Therefore, when an error occurs between the moving amount of the moving bed and the moving amount of the moving side ring rail, it is not necessary to perform a difficult drive control such as correcting the moving amount error. The configuration of the rotary irradiation chamber 1 is much simpler than that of the conventional rotary irradiation chamber for radiation therapy, which is advantageous in terms of the price of the rotary irradiation chamber 1 for particle beam therapy, and its operation is also easy. It is possible to achieve such an excellent effect.

Next, a rotary irradiation chamber for particle beam therapy according to Embodiment 2 of the present invention will be described. However, the difference between the rotating irradiation chamber for particle beam therapy according to the second embodiment and the rotating irradiation chamber for particle beam therapy according to the first embodiment lies in the configuration of the moving bed. Have exactly the same configuration, FIG. 6 (a) showing a partial plan view of the moving floor and FIG.
With reference to FIG. 6B in the view of the arrow E in FIG. 6A and FIG. 6C in the view of the arrow F in FIG. 6B, only the differences will be described below.

Numeral 8 shown in the figure is a moving floor of the rotary irradiation room for particle beam therapy according to the second embodiment. This moving floor 8
Is a link plate 8b forming a floor surface, and the link plate 8b
Each longitudinal direction (corresponding to the width direction of the moving floor 8)
A roller mounting member 8c composed of two plate members protruding in a direction orthogonal to the link plate 8b and a beam member connecting the two, and two of these roller mounting members 8c. It is rotatably attached to each of the plate members,
A plurality of carriers 8a composed of guide rollers 8d and 8d which are fitted and rolled on the fixed body side guide rail 2a and the rotating body side guide rail 5a are connected endlessly by a plurality of hinge pins 8e. It is constituted by that.

As described above, in the rotary irradiation room for particle beam therapy according to the second embodiment, the configuration of the moving bed 8 is different from that of the movable floor 6 of the rotary irradiation room for particle beam therapy according to the first embodiment. The only difference is that the rotary irradiation chamber for particle beam therapy according to the second embodiment is the same as the rotary irradiation chamber for particle beam therapy according to the first embodiment.

By the way, in the case of the rotary irradiation chamber for particle beam therapy according to the first or second embodiment, as described above,
Although two rod operating electric cylinders are arranged on the upper side of the fixed body, these rod operating electric cylinders can be arranged on the lower side of the fixed body. However, when the rod operating electric cylinder is arranged on the lower side of the fixed body, there is a slight disadvantage in maintenance work as compared with the case where the rod operating electric cylinder is arranged on the upper side of the fixed body.

Further, even when the electric cylinder for operating the rod is replaced with a hydraulic cylinder having a known structure, a motor, a ball screw reversibly rotated by the motor, and a locking rod reciprocated by the ball screw are used. Even with the configuration consisting of the following, the function equivalent to that of the rod-operating electric cylinder can be exerted, and the technical idea of the present invention is not limited by the first or second embodiment.

[0027]

As described above, according to the rotating irradiation chamber for particle beam therapy according to the first to third aspects of the present invention, the expansion / contraction device as the locking means engages with the engaging hole as the engaging portion. By engaging the stop rod, the rotating body-side guide rail continues to be stationary irrespective of the rotational position of the particle beam irradiation unit, so that the lower side of the moving floor can be maintained in a horizontal state.
Therefore, there is no need for a driving means for synchronously moving the rotating body-side ring rail by the same amount in the direction opposite to the moving floor, as in the case of the rotating irradiation room for radiotherapy according to the conventional example. Since there is no need for difficult drive control such as correcting when an error occurs between the amount of movement of the ring rail, the configuration of this particle irradiation rotary irradiation chamber is the same as that of the conventional radiation therapy rotary irradiation chamber. There is an extremely excellent effect that it is simpler and cheaper than the configuration, and the operation is easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a rotary irradiation chamber for particle beam therapy according to Embodiment 1 of the present invention.

FIG. 2A is a detailed view of a portion A in FIG. 1, and FIG.
FIG. 2B is a sectional view taken along line BB of FIG.

FIG. 3 is a diagram showing a cross section of a moving floor of a rotary irradiation room for particle beam therapy and a guide rail support cylinder according to Embodiment 1 of the present invention.

FIG. 4 is a diagram showing a cross section of a moving floor of a rotary irradiation room for particle beam therapy according to Embodiment 1 of the present invention and a support state of a rotary drum.

5A is an enlarged sectional view of a portion C in FIG. 3 according to the first embodiment of the present invention, and FIG.
It is the arrow D view of (a).

6 (a) is a partial plan view of a moving floor, and FIG. 6 (b) is a view E of FIG. 6 (a) according to the second embodiment of the present invention.
FIG. 6C is a view taken in the direction of an arrow, and FIG.

FIG. 7 is a perspective view of a main part of a rotary irradiation chamber for radiation therapy viewed obliquely from the front, according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotation irradiation room for particle beam therapy 2 ... Fixed body, 2a ... Fixed body side guide rail (for moving floor), 2b ... Guide rail (for treatment bed), 2c ...
Treatment bed 3 ... Particle beam irradiation unit 4 ... Rotating drum, 4a ... Rotating drum support ring, 4b ... Support roller 5 ... Guide rail support drum, 5a ... Rotating drum side guide rail (for moving floor), 5b ... Guide rail support Torso support member, 5
c: support roller, 5d: engagement hole 6: moving floor, 6a: rubber belt, 6b: carrier, 6c
... Beam member, 6d Guide roller 7 ... Electric cylinder for rod operation, 7a ... Locking rod, 7
b: Cylinder mounting frame, 7c: Linear rail, 7d: Linear way 8: Moving floor, 8a: Carrier, 8b: Link plate, 8c ...
Roller mounting member, 8d: Guide roller, 8e: Hinge pin 100: Building wall

Claims (3)

[Claims] 1. A fixed body side guide rail is provided on a fixed body in which a treatment bed is provided, and a rotating body that supports a particle beam irradiation unit that rotates around a patient on the treatment bed is provided. A guide rail support cylinder provided with a rotating body side guide rail is provided inside the rotating body, and the fixed body side and the rotating body side guide rail are provided by the fixed body side and the rotating body side guide rail.
The lower side is horizontal, and an irradiation chamber is formed with the fixed cylinder and the guide rail support cylinder inside, and a bendable endless movable floor that operates in synchronization with the rotation of the particle beam irradiation unit is supported. In the rotating irradiation chamber for particle beam therapy, an engaging portion is provided on the guide rail supporting body side, and the engaging means is detachably engaged with the engaging portion on the fixed body side to stop the guide rail supporting body at rest. A rotary irradiation chamber for particle beam therapy, comprising: 2. The particle beam therapy according to claim 1, wherein said engaging portion is an engaging hole, and said locking means is a telescopic device for inserting and removing a locking rod from said engaging hole. Rotation irradiation room. 3. The particle beam according to claim 2, wherein the engagement hole and a telescopic device for inserting and removing the locking rod are provided on both sides in the rotation direction of the particle beam irradiation unit. Rotational irradiation room for treatment.