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Method for verifying parameters of medical linear accelerator

A linear accelerator and accelerator technology, applied in the field of medical devices, can solve problems such as radiation therapy safety accidents

Inactive Publication Date: 2020-08-28
ZHEJIANG CANCER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to find millimeter-level parameter errors in the current ionization chamber matrix;
[0004] The above problems are likely to lead to the occurrence of radiotherapy safety accidents, and no effective solutions have been proposed so far

Method used

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  • Method for verifying parameters of medical linear accelerator
  • Method for verifying parameters of medical linear accelerator
  • Method for verifying parameters of medical linear accelerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see figure 1 , the data host 3 uses the linear accelerator log data acquisition sub-module 2 to collect parameter data from the accelerator data processing control host 1 . Use the log data analysis sub-module 4 of the linac to write the acquired log data into the log file according to the accelerator control point sequence, for example, generate a log file during each subfield interval and write the log data in an orderly manner Write the log data into the log file according to the control point, which can reduce the read and write load of the disk, reduce data redundancy, and write the log data in an orderly manner to ensure the orderliness of the log data, which is convenient for blades one by one. Compare with plan multileaf collimator file. According to the DICOMRT data extracted from the treatment planning system 5 and using the treatment planning data acquisition sub-module 6 for comparison, multiple tolerance values ​​are applied to different parameters. Confi...

Embodiment 2

[0038] see figure 1 , linac log data and treatment planning data query, based on the medical linac verification system to provide continuous accelerator parameter data flow, and continuously transmit real-time linac treatment status in digital form. Application of linear accelerator log data and treatment plan data query sub-module 7 can register multiple pieces of information in space and time, and then present it to the user in a unified form.

Embodiment 3

[0040] see figure 1 , the readings of the displacement meters or encoders of each parameter from the accelerator data processing control host 1 can be obtained to determine the analysis data. The linear accelerator log data acquisition sub-module 2 accesses the parameter corresponding file every 50ms. The frame angle, collimator angle, bed angle, and multi-leaf collimator all have independent displacement gauges or encoders to control the position of recording the corresponding parameters. The plan and treatment data analysis and processing sub-module 8 will first detect the calling log, including thread detection and method detection. Thread detection mainly filters out threads that are constantly generating logs, such as timed tasks, and method detection will be detected within a certain period of time. The frequency of method calls, filter out the parameter values ​​that are frequently called repeatedly, and finally extract the parameter values ​​to a fixed number and stor...

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Abstract

The invention provides a method for verifying parameters of a medical linear accelerator. The problem of radiotherapy safety accidents possibly caused in a radiotherapy process is solved through information acquisition, analysis, simulation calculation and comparison methods. Log data is an important data resource existing in a linear accelerator system, but due to the fact that the log data sizeis huge, a common accelerator manufacturer only opens limited basic services of data collection and browsing. According to the log data-based method for verifying parameters of a medical linear accelerator, a linear accelerator system can be monitored, operation of the linear accelerator operator can be examined, and the log data can be analyzed according to the actual requirements of a user.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a method for information collection, analysis, simulation calculation and comparison of a log file collector controlled by a medical linear accelerator, in particular to a method for verifying parameters of a medical linear accelerator. [0002] technical background [0003] In radiotherapy, strategies for treatment plan validation have evolved with the complexity of radiotherapy techniques. At present, the strategy of treatment plan verification is to use two-dimensional or three-dimensional ion chamber matrix instead of the patient himself to verify the treatment plan. There are still many defects in this operation, including: 1. The use of two-dimensional or three-dimensional ion chamber matrix is ​​an offline plan verification method, which cannot obtain the operating status of the medical linear accelerator at the time of treatment, and cannot capture the patient's progress durin...

Claims

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1075
Inventor 单国平陈明王彬冰白雪
Owner ZHEJIANG CANCER HOSPITAL