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Penumbra adjustment device for radiation therapy device and radiation therapy device using the device

A technology for radiotherapy and adjustment devices, which is applied in the fields of radiodiagnostic instruments, applications, and medical sciences. It can solve the problems of low machine utilization, inefficient and complicated operations, and non-continuous adjustment, so as to improve the effective utilization rate. , Reduce medical costs and patient burden, reduce volume and weight

Active Publication Date: 2017-11-17
SUZHOU LINATECH MEDICAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is also a light-limiting tube with a specific shape (or a round hole) for high-dose SRS treatment. The light-limiting tube can reduce the penumbra to ≤1mm, which has excellent performance. However, in order to reduce the penetration of the light-limiting tube material Radiation dose requires a certain thickness of the light limiting tube, which is generally about 8cm at present, resulting in a large weight and volume, difficult replacement and calibration, and time-consuming and laborious. Since the aperture of the light limiting tube is fixed and not continuously adjustable, it must be adjusted according to different diseases. Suffering from frequent replacement of light-limiting tubes, resulting in very inefficient and complicated operations, and low machine utilization. At present, technical personnel in the field have no relevant solutions and technical inspirations

Method used

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  • Penumbra adjustment device for radiation therapy device and radiation therapy device using the device
  • Penumbra adjustment device for radiation therapy device and radiation therapy device using the device
  • Penumbra adjustment device for radiation therapy device and radiation therapy device using the device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as Figure 5 As shown, a penumbra adjusting device for a radiotherapy device includes:

[0030] At least one light limiting device for restricting the ray irradiation range to reduce the penumbra area, and a switching device 6 for switching light limiting devices of different specifications, the switching device 6 is provided with the same number as the light limiting device or more than the limit The light limiting device installation part 611 of the number of light devices is used to match and install the light limiting device, and the transmission device 62 that drives the switching device to move according to design requirements.

[0031] The light limiting device installation part 611 is a through hole or a clamping device matching the shape of the light limiting device.

[0032] In this embodiment, the light limiting device installation part 611 is arranged on a bracket 61 that rotates along the central axis, and the light limiting devices are all fixedly or...

Embodiment 2

[0037] The rest is the same as that of Embodiment 1, except that the housing body 41 includes a shell and a lead layer embedded in the inner surface and / or outer surface of the shell, or a lead layer poured into the shell. The purpose of this is to facilitate processing and preparation. The metal shell made of other materials has simpler processing technology and a more beautiful appearance. The main part of isolating rays is the lead layer fixed on the shell. If the shell is made The double-layer casing with a hollow cavity can melt the lead and pour it into the cavity, and the manufacturing process and cost are lower.

[0038] In the above embodiment, the envelope surface of the through hole converges upwards at a point along the longitudinal section of the central axis, and the position of this point is consistent with the position of the emission source of the reducer when installed on the radiotherapy equipment.

Embodiment 3

[0040] Such as Figure 4 with Figure 6 As shown, in order to further improve product performance, a blade collimation device 2 is also provided above the bracket 61. The blade collimation device is the so-called adjustable grating, and the grating is composed of two sets of oppositely arranged multiple blades. , by controlling the horizontal movement position of the blades, a through hole similar in shape to the lesion is formed between the blades, so as to improve the accuracy of ray irradiation and avoid damage to healthy tissues. The blade collimation device 2 is vertically superimposed on the light-limiting tube body 41 to further optimize product performance. First, optimize the irradiation area to make its shape more consistent with the lesion, and second, greatly reduce the area of ​​the penumbra.

[0041] The height of the blade collimation device is any value between 4-9cm.

[0042] The present invention also provides a radiation therapy device, wherein the above-men...

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Abstract

The invention discloses a device for adjusting the penumbra area of ​​a radiotherapy device and a radiotherapy device using the device. Due to the adjustment function of the light limiting device, the divergence area of ​​rays is greatly shrunk, and the penumbra area is greatly reduced. It can be reduced to ≤±1mm, so that the treatment can be accurately positioned, providing conditions for less fractionation and high-dose treatment, adding a switching device, pre-installing the commonly used or required light limiting device on the switching device, and then using the switching device as needed The operation of replacing the light limiting device by the device does not require manual disassembly and installation, and can switch between the installed light limiting devices at will, thus greatly improving work efficiency and improving the effective utilization of expensive equipment.

Description

technical field [0001] The invention relates to a medical device, in particular to a penumbra adjusting device for a radiation therapy device used in conjunction with an accelerator therapy device and a radiation therapy device using the device. Background technique [0002] When radiotherapy is performed on a tumor (target area), precise positioning of the tumor is required. In the 3D space, the doctor or physicist first scans the patient's CT images in the CT room, and reconstructs a series of CT images into a 3D image through an algorithm. At this time, the 3D coordinates of the tumor in the 3D image can be located. Then the doctor or physicist places the patient in the accelerator room for reset, and precisely coincides the three-dimensional coordinates of the tumor with the treatment isocenter of the accelerator. Finally start treatment. In order to protect healthy tissues from damage, current radiotherapy equipment generally uses custom-made shading plates or blade c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/00
Inventor 姚毅
Owner SUZHOU LINATECH MEDICAL SCI & TECH CO LTD