Development of a Relative Dosimetric System for Calibration of ³²P Eye Applicators Using Radiochromic Films.

IF 0.7 Q4 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Journal of Medical Physics Pub Date : 2024-01-01 Epub Date: 2024-03-30 DOI:10.4103/jmp.jmp_99_23

Alireza Nazempoor, Hosein Poorbaygi, Seyed Mahmud Reza Aghamiri, Mohammad Reza Javanshir, Shahab Sheibani, Reza Naghdi, Somayeh Moradi, Ali Habibpanah

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引用次数: 0

Abstract

Introduction: Beta irradiation after bare scleral surgery of primary pterygium is an effective and safe treatment, which reduces the risk of local recurrence.

Purpose: Obtaining the reference dose rate for a radioactive applicator consisting of a plate as a 32P absorber, a steel window and a steel capsule.

Methods: Relative dosimetry and dose profile were measured using two types of radiochromic films, HD-810 and EBT1, for the ³²P applicator and were compared with Monte Carlo simulation data. Dose uniformity in the ³²P applicator was obtained with radiochromic HD-810 film.

Results: The measurement depth dose distribution data at distances up to 3.8 mm were compared with calculation data, and the values were not found to differ statistically. Depth dose distribution with a large dose gradient was determined and the dose rate data obtained 0.0053 ± 9.9% in unit of Gy/s.mCi at a 0.1 mm depth distance. Practical results indicated that the dose nonuniformity and the maximum symmetrical for the ³²P applicator were 11.5% and 9.2%, respectively.

Conclusions: Our experiments show that the use of the radiochromic film to perform the relative dosimetric checks is feasible and the activity value with acceptable error can be determined through this indirect method.

查看原文本刊更多论文

开发用于校准使用放射性变色膜的 32P 眼部涂抹器的相对剂量系统。

简介：原发性翼状胬肉裸巩膜手术后进行β照射是一种有效、安全的治疗方法，可降低局部复发风险：原发性翼状胬肉裸巩膜手术后进行β照射是一种有效而安全的治疗方法，可降低局部复发的风险。目的：获得由作为32P吸收器的平板、钢窗和钢囊组成的放射涂抹器的参考剂量率：方法：使用HD-810和EBT1两种类型的放射性变色膜测量32P敷贴器的相对剂量测定和剂量曲线，并与蒙特卡罗模拟数据进行比较。使用 HD-810 射线变色薄膜获得了 32P 施用器的剂量均匀性：结果：距离达 3.8 毫米的测量深度剂量分布数据与计算数据进行了比较，发现两者的数值在统计学上没有差异。测定的深度剂量分布具有较大的剂量梯度，0.1 毫米深度距离的剂量率数据为 0.0053 ± 9.9%（单位：Gy/s.mCi）。实际结果表明，32P 施用器的剂量不均匀性和最大对称性分别为 11.5% 和 9.2%：我们的实验表明，使用放射性变色膜进行相对剂量测定是可行的，通过这种间接方法可以确定误差在可接受范围内的放射性活度值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Medical Physics RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-

CiteScore

1.10

自引率

11.10%

发文量

审稿时长

30 weeks

期刊介绍： JOURNAL OF MEDICAL PHYSICS is the official journal of Association of Medical Physicists of India (AMPI). The association has been bringing out a quarterly publication since 1976. Till the end of 1993, it was known as Medical Physics Bulletin, which then became Journal of Medical Physics. The main objective of the Journal is to serve as a vehicle of communication to highlight all aspects of the practice of medical radiation physics. The areas covered include all aspects of the application of radiation physics to biological sciences, radiotherapy, radiodiagnosis, nuclear medicine, dosimetry and radiation protection. Papers / manuscripts dealing with the aspects of physics related to cancer therapy / radiobiology also fall within the scope of the journal.