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Self-correcting multi-cure-fitting digital dosage monitoring method and system

A multi-curve fitting, digital technology, applied in X-ray/γ-ray/particle irradiation therapy, X-ray equipment, electrical components, etc., can solve the problem of harm to patients' health, inaccurate dose rate adjustment, and doses that do not meet the needs of patients. and other problems to achieve the effect of convenient system construction

Active Publication Date: 2011-06-15
江苏海明医疗器械有限公司
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Problems solved by technology

[0004] However, there is not a simple linear relationship between the output signal of the ionization chamber and the actual dose rate. If the output signal of the ionization chamber is not corrected, there will be a large deviation between the monitored dose and the actual dose when the dose rate changes greatly.
In this case, the dose rate adjustment performed by the monitoring host based on the actual dose rate signal collected by the ionization chamber is not accurate enough, resulting in the administered dose not meeting the patient's needs and endangering the patient's health

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  • Self-correcting multi-cure-fitting digital dosage monitoring method and system

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[0023] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0024] The present invention provides a self-calibration, multi-curve fitting digital dose monitoring scheme. The basic idea is to perform data fitting according to the collected values ​​in advance, and the fitting function is a piecewise function, so as to establish the output signal of the ionization chamber and the actual The actual nonlinear correspondence of dose rate is not a simple linear relationship, so the monitoring system of the present invention can obtain accurate actual dose rate. Large deviations between actual doses.

[0025] figure 1 Flow chart of the self-calibrating, multi-curve fitting digital dose monitoring method. Such as figure 1 As shown, the process includes:

[0026] Step 1: Data collection.

[0027] In this step, install the ionization chamber on the linear accelerator prototype, use beams of different dose rates to pass ...

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Abstract

The invention discloses a self-correcting multi-cure-fitting digital dosage monitoring method and a system. The method comprises that data fitting is conducted in advance according to acquisition values, a fitting function is a piecewise function, an actual nonlinear relationship between ionization chamber output signals and actual dosage rate is established and the relationship is not a simple linear relationship. Thereby, the monitoring system of the invention can obtain accurate actual dosage rate and large deviation between the monitored dosage and the actual dosage is not caused even though the dosage rate is greatly changed.

Description

technical field [0001] The invention relates to the technical field of radiotherapy equipment, in particular to a self-calibration, multi-curve fitting digital dose monitoring method and system. Background technique [0002] The dose monitoring system is one of the foundations for applying X-radiation or electron radiation from medical electron accelerators to radiotherapy. Safe, accurate, and reliable delivery of the required dose is the primary function of a dose monitoring system. [0003] During the radiotherapy process, the dose monitoring system uses a transmission ionization chamber to collect the actual dose rate of the electron accelerator and sends it to the monitoring host, which adjusts the subsequent dose rate according to the actual dose rate to ensure safe and accurate delivery to the patient. , Reliably deliver the required dose. [0004] However, there is not a simple linear relationship between the output signal of the ionization chamber and the actual do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10H05G1/26
Inventor 柘江吴建兴王春波王小军高阳薛小峰邓勇
Owner 江苏海明医疗器械有限公司
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