Feasibility study of radiophotoluminescent glass rod dosimeter postal dose intercomparison for high energy photon beam

Rah, Jeong-Eun; Kim, Siyong; Cheong, Kwang Ho; Lee, Jeongwoo; Chung, Jin-Beom; Shin, Dong-Chun; Suh, Tae-Suk

doi:10.1016/j.apradiso.2008.09.018

Cited by 27 publications

(15 citation statements)

References 6 publications

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“…Their study demonstrated that the system was suitable for measurements of treatment machine output, and is proposed for use at a number of treatment centers in Japan. A similar analysis in Korea led to the same conclusion (53). However, the experience at the IAEA in Vienna is comparable to that of the RPC in terms of numbers of separate institutions audited, although the frequency of audits is lower (54).…”

Section: External Dosimetry Auditssupporting

confidence: 63%

Quality Assurance for Clinical Trials

Haworth

Followill²

2013

Front. Oncol.

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Cooperative groups, of which the Radiation Therapy Oncology Group is one example, conduct national clinical trials that often involve the use of radiation therapy. In preparation for such a trial, the cooperative group prepares a protocol to define the goals of the trial, the rationale for its design, and the details of the treatment procedure to be followed. The Radiological Physics Center (RPC) is one of several quality assurance (QA) offices that is charged with assuring that participating institutions deliver doses that are clinically consistent and comparable. The RPC does this by conducting a variety of independent audits and credentialing processes. The RPC has compiled data showing that credentialing can help institutions comply with the requirements of a cooperative group clinical protocol. Phantom irradiations have been demonstrated to exercise an institution’s procedures for planning and delivering advanced external beam techniques (1–3). Similarly, RPC data indicate that a rapid review of patient treatment records or planning procedures can improve compliance with clinical trials (4). The experiences of the RPC are presented as examples of the contributions that a national clinical trials QA center can make to cooperative group trials. These experiences illustrate the critical need for comprehensive QA to assure that clinical trials are successful and cost-effective. The RPC is supported by grants CA 10953 and CA 81647 from the National Cancer Institute, NIH, DHHS.

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Section: External Dosimetry Auditssupporting

confidence: 63%

Quality Assurance for Clinical Trials

Haworth

Followill²

2013

Front. Oncol.

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“…Radiophotoluminescent glass dosimeters (RGDs) have been used for output factor measurements of small fields [1][2][3][4][5] and postal dosimetry audit [6][7][8] of megavoltage radiotherapy photon beams. This is because RGDs show no fading effect and are stable over long periods of time.…”

Section: Introductionmentioning

confidence: 99%

The response of a radiophotoluminescent glass dosimeter in megavoltage photon and electron beams

Araki

Ohno

2014

Medical Physics

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The RGD response for photon beams depends on both (1 - d) and perturbation effects in the RGD cavity. Therefore, it is difficult to predict the energy dependence of RGD response by Burlin's theory and it is recommended to directly measure RGD response or use the MC-calculated RGD response, regarding the practical use. The response for electron beams decreased rapidly at a depth beyond dref for lower mean electron energies <3 MeV and in contrast PQ increased.

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“…This forms an independent quality audit for the dose delivered by external beam radiotherapy treatment machines [1]. The limitations of such dosimeters include potential hygroscopic problems and thermal fading [2]. This has stimulated studies of various alternative materials for medical radiation TL dosimeters [3].…”

Section: Introductionmentioning

confidence: 99%

Dosimetric characteristics of fabricated silica fibre for postal radiotherapy dose audits

Fadzil

Ramli

Jusoh

et al. 2014

J. Phys.: Conf. Ser.

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Abstract. Present investigation aims to establish the dosimetric characteristics of a novel fabricated flat fibre TLD system for postal radiotherapy dose audits. Various thermoluminescence (TL) properties have been investigated for five sizes of 6 mol% Ge-doped optical fibres. Key dosimetric characteristics including reproducibility, linearity, fading and energy dependence have been established. Irradiations were carried out using a linear accelerator (linac) and a Cobalt-60 machine. For doses from 0.5 Gy up to 10 Gy, Ge-doped flat fibres exhibit linearity between TL yield and dose, reproducible to better than 8% standard deviation (SD) following repeat measurements (n = 3). For photons generated at potentials from 1.25 MeV to 10 MV an energy-dependent response is noted, with a coefficient of variation (CV) of less than 40% over the range of energies investigated. For 6.0 mm length flat fibres 100 µm thick x 350 µm wide, the TL fading loss following 30 days of storage at room temperature was < 8%. The Ge-doped flat fibre system represents a viable basis for use in postal radiotherapy dose audits, corrections being made for the various factors influencing the TL yield.

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Feasibility study of radiophotoluminescent glass rod dosimeter postal dose intercomparison for high energy photon beam

Cited by 27 publications

References 6 publications

Quality Assurance for Clinical Trials

Quality Assurance for Clinical Trials

The response of a radiophotoluminescent glass dosimeter in megavoltage photon and electron beams

Dosimetric characteristics of fabricated silica fibre for postal radiotherapy dose audits

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