Method for measuring gamma dose of boron neutron capture therapy beam

By simultaneously irradiating multiple thermoluminescent dosimeters and performing two independent measurements, combined with standardized annealing and data traceability, the problems of speed, accuracy, and repeatability in gamma dose measurement of boron neutron capture therapy beams in existing technologies have been solved, achieving highly efficient dose measurement.

CN122151145APending Publication Date: 2026-06-05LANZHOU UNIV
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Patent Information

Application Number
CN202610198298.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-11
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In the existing technology, the gamma dose measurement method for boron neutron capture therapy beam has problems such as insufficient speed and accuracy, large error and non-reusability. In particular, the ionization chamber, semiconductor detector and film dosimeter have shortcomings in operation process and cost.

Method used

Multiple thermoluminescent dosimeters were used for simultaneous irradiation. Through two independent measurements, combined with standardized annealing pretreatment and unique numbering, a water equivalent phantom was used for precise positioning and data traceability to ensure the repeatability and accuracy of the measurements.

Benefits of technology

It enables rapid, accurate, low-error, and repeatable gamma dose measurement of boron neutron capture therapy beams, simplifying the operation process and improving measurement efficiency and the reliability of results.

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Abstract

The invention discloses a boron neutron capture therapy beam gamma dose measurement method, and relates to the technical field of radiotherapy, and the method comprises the steps: carrying out the standardized annealing pretreatment of a thermoluminescence dose sheet, screening, and numbering; positioning and calibrating the water equivalent phantom fixed on the treatment bed to complete reference positioning; loading the thermoluminescence dose sheet in a water equivalent phantom for irradiation; taking out the phantom after irradiation is finished, establishing a one-to-one correspondence relationship between the unique number and the three-dimensional space position of the unique number in the phantom, and recording the one-to-one correspondence relationship; carrying out first measurement and second measurement on all the dosage pieces in sequence, and calculating a thermoluminescence net gamma count to obtain an absorbed dosage value; and the thermoluminescent dose sheet is subjected to annealing treatment again, so that subsequent recycling is facilitated. According to the invention, the plurality of thermoluminescent dose sheets irradiate at the same time, so that the time is shortened; independent measurement is carried out twice, and interference signals are deducted; the complex operation process is standardized and programmed, the measurement repeatability and efficiency are improved, and the method is convenient, rapid, novel and accurate.
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