JPS6253675A - Medical radiation treatment apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an apparatus for performing radiation therapy that uses external radiation (
This is used to aim the patient's position when radiation is irradiated from outside the human body.

[Conventional technology]

FIG. 3(a) is an elevational view of a conventional device, and FIG. 3(b) is a front view thereof. In Fig. 3, tl+11 is a rotating pedestal for the radiotherapy device, (2) is a collimator head for irradiating the generated radiation, (3) is a fixed pedestal for supporting the rotating pedestal fll, and (41 is for supporting the patient). A treatment table, (5) C. A top plate supported by the treatment table +41 and used to make the patient lie down, (6N-1 a rotating disc that rotates together with the treatment table (4) when it rotates, (7) is a table in the treatment room. floor, (10
1 is the radiation that is generated, (6) is the hy=Sai F pointer fixed to both walls of the treatment room for aiming, and the ceiling pointer is fixed to the ceiling for aiming (i3Fi) for confirming the position of the patient's back. The back pointer of (A is the rotating frame fil
The intersection point between the central axis of the radiation f101 and the central axis around which the radiation f101 rotates is usually called the isocenter.

Next, the operation will be explained. Treatment is performed by irradiating the affected area of a patient lying on a tabletop (6) with radiation (10), but before treatment, the patient's position must be aimed so that the radiation can be irradiated correctly. For this purpose, first, the patient's height and position in the anteroposterior direction are confirmed using the side pointers αυ (there are two on both walls).

Next, when the rotating frame fil is directly above, the position can also be confirmed by confirming the irradiation field of the collimator head +21. When the collimator head (2) is not directly above the rotating pedestal (11), use the ceiling pointer (6) to check the patient's position in the front, back, left and right.Furthermore, check the position on the opposite side of the patient from the central axis of the radiation (lO). This can be done using the back pointer α.After confirming the patient position as described above,
Although not shown in FIG. 3, the aiming field for radiation (101) is determined, and then radiation therapy begins.

Incidentally, the side pointer (6), the ceiling pointer@, and the back pointer a3 all project cross-shaped or linear light.

Also 1. The treatment table +41#-r can rotate around the vertical rotation including the ain center (A), and at this time the rotating disk (6
) C is at the same height as the floor (7), but rotates with the treatment table (41).

[Problem to be solved by the invention] Since the conventional device was not configured as described above, when irradiating from a position where the rotating mount (11) is slightly rotated, the light from the ceiling pointer @ does not reach the patient. It is not possible to align the left and right positions.For this reason, the rotating mount (
t+f: Move and align, or rotate stand +11
There was a problem in that the collimator head (2) had to be aligned directly above T and then the rotary mount fil should be aligned with J to the point where it should be irradiated.

In addition, since a straight line of light passing through the back pointer QJf1 is projected, there is a problem that the back position on the central axis of the radiation (lO) cannot be determined.

This invention was made to solve the above problems.
This makes it easy to align the patient regardless of the position of the rotating gantry +11, and in combination with the Nonotsu pointer Q3, the patient's back position of the central axis of the radiation (lO) can be adjusted.
It is an object of the present invention to obtain a medical radiotherapy apparatus TE which allows confirmation when a rotating pedestal ILL is in the vicinity directly above.

[Means for solving problems]

Is the radiation therapy device @ related to this invention a pointer similar to the ceiling pointer @ at the bottom of the rotating disk (6) on the extension line of the ceiling pointer @ and the isocenter (A)? It has a two-digit structure. A pointer installed at the bottom of the rotary disk projects a cross toward the patient, but the pointer is fixed independently of the rotary disk and does not rotate together with the rotary disk.

With the above structure, it is possible to confirm the position of the patient from below, and in combination with the back pointer (to), it is possible to confirm the position of the back of the patient on the +01 central axis.

[Embodiments of the invention]

An embodiment of this invention will be described below. In FIG. 1, @ is a pointer that projects a cross-shaped line used for patient positioning, and is referred to here as a floor pointer. The rotating disc (6) is a bearing that can be rotated completely, and one of the four bearings is fixed to a fixed bed. (c)
is a metal fitting that fixes the floor pointer @ to this fixed floor (c).

Figure 2 shows each of the above parts in detail. Floor pointer Qη
Projection of the cross-shaped image is carried out by signals from the cable tower. Further, a window (A) made of transparent material is attached to the upper part of the floor pointer of the rotating disk (6).

A cross-shaped image consisting of projection g1 of the floor pointer (g1) and two images 0I) (to), which fully includes the entire body of the patient in a plane parallel to the floor surface (7) that includes the isocenter (A)'e. It is a cross-shaped statue with dimensions. Furthermore, if the direction is parallel to the axis of rotation of the rotary frame (1), then the direction is perpendicular to this direction.

A cross-shaped image 01) (to) is aimed at the patient's back from the floor pointer (c) through the transparent window. At this time, the intersection of the crosshairs is adjusted so that it is on the vertical axis included in the isocenter (A)'. Further, one image Q of the cross-shaped image is parallel to the rotation axis of the rotary frame fl'+, and the other image (to) is adjusted to be perpendicular to h. Use the ceiling pointer (
Even if b) cannot be used, this can be done by using the floor pointer @. Therefore, the patient's position can be accurately determined even after the rotating gantry (11) has been previously aligned to the position to be irradiated.

In addition, although the back pointer l1l- is projected as a straight line parallel to the rotation axis of the rotating mount fi+, the intersection with the image (toward) of the floor pointer ■D projected onto the patient's body surface is the radiation ( 10), and the direction of the radiation can also be confirmed.

In the second example above, a device in which the rotary stand +11 rotates will be described.7: However, instead of rotating, it may move up and down or horizontally. Also, the treatment table (4) is at the isocenter (A).
Although a device that rotates around a vertical axis has been described, a device that does not rotate or a device that moves all the way back and forth or left and right on the floor may be used.

The cable was an electric signal wire, but does the floor pointer Q1) generate light only at the head part that illuminates the cross-shaped line? When using a laser sight with a separate unit, (g) may be an optical 7-eyeper.

〔Effect of the invention〕

As described above, according to this invention, the floor pointer is placed under the floor, so even if the ceiling pointer cannot be used, the patient's position can be set and confirmed.Furthermore, when two back pointers are combined, the central axis of the radiation The position of the patient can also be known, making it easier to set up the patient for radiation therapy and shorten the setting time.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of a medical radiation therapy apparatus according to an embodiment of the present invention. FIG. 2 is a detailed view of the floor pointer section of the present invention, the third slit (a) is an elevational view of a conventional medical radiation therapy apparatus, and (b) is a front view. (6)... Rotating disc of treatment table, (13... Back pointer, CD... Floor pointer, )... Bearing, Hanging... Fixed floor, (C)... Floor pointer Fixing metal fittings, cypress...transparent window, (E)...cable, O
D, (to)...Projected cross image of floor pointer 21). In the figure, the same reference numeral 8 indicates the same or all corresponding parts.

Claims (1)

[Claims] In a radiation therapy device that has an optical sight for aiming at the treatment position of a patient on a treatment table for making the patient lie down, the optical sight is installed in the rotating disk of the treatment table at the same height as the floor of the treatment room. A medical radiation therapy device characterized in that it is equipped with a sighting device that enables the patient's treatment center position to be aimed from the bottom of the treatment table top plate.