Performance assessment of ionization chambers in standard diagnostic radiology beams through the determination of calibration coefficients

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2025-02-01 DOI:10.1016/j.radmeas.2024.107349

Olumide Olaife Akerele, Samuel Mofolorunsho Oyeyemi, David Olakanmi Olaniyi, Oluwadamilare Timothy Fashogbon, Francis Adole Agada, Sherif Olaniyi Kelani, Akinkunmi Emmanuel Ladapo, Ahmed Mohammed Shiyanbade, Bamidele Musbau Adeniran, Latifat Ronke Owoade

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引用次数: 0

Abstract

Dosimetry laboratories use reference ionization chambers (ICs) as their primary instruments for measuring radiation doses. The ICs are designed to have defined and accurate response characteristics, making them suitable for calibrating radiation detectors in specific beam qualities. This study assesses six ionization chambers (Radcal 10X6-3CT, Radcal 10X6-M, Radcal 10X6-10, Radcal 10X6-6, Exradin A4, and FC-65-G1) in standard International Electrotechnical Commission (IEC) defined diagnostic beams [RQR, RQA, RQT, and RQR-M (W + Al)] at the Secondary Standard Dosimetry Laboratory (SSDL). Calibration coefficients were estimated to evaluate energy dependency and relative response deviations of the ICs. Results showed that most ICs tested had limited energy dependency in RQR, RQA, and RQT beams, with deviations under 5%, confirming their suitability for clinical dosimetry and reference calibration at the SSDL. The Radcal 10X6-M performed well in mammography beams, while the other ICs showed significant deviations (6%–107%) in RQR-M (W + Al), limiting their mammography use. A key finding is the extended applicability of certain ICs beyond their specified energy ranges, particularly the Radcal 10X6-3CT, Radcal 10X6-M, and Radcal 10X6-10, which performed well in a broader range of diagnostic beam energies. This study provides essential data for optimizing IC selection and calibration, and highlights the need for further development of energy-independent ICs for enhanced versatility across clinical settings.

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.