Measurement of Radiation Dose Distributions with Photochromic Materials

McLaughlin, W.L.; Chalkley, Lyman

doi:10.1148/84.1.124

Cited by 16 publications

(4 citation statements)

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“…In 1965 McLaughlin et al reported on the development of colorless solid solutions of particular materials, namely derivatives of the triphenyl methane molecule, that underwent radio-synthesis to produce dyes 5 . Much of the early work on radiochromic materials can be attributed to the National Institute of Standards and Technology (NIST, US).…”

Section: Historical Backgroundmentioning

confidence: 99%

Radiochromic Film Dosimetry and its Applications in Radiotherapy

Williams

Metcalfe

2011

AIP Conference Proceedings

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Radiochromic film can be a fast and inexpensive means for performing accurate quantitative radiation dosimetry. The development of new radiochromic compositions that have greater dose sensitivity and fewer environmental dependencies has led to an ever increasing use of the film in radiotherapy applications. In this report the various physical and dosimetric properties of radiochromic film are presented and the strategies to adequately manage these properties when using radiochromic film for radiotherapy applications are discussed.

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Section: Historical Backgroundmentioning

confidence: 99%

Radiochromic Film Dosimetry and its Applications in Radiotherapy

Williams

Metcalfe

2011

AIP Conference Proceedings

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“…The first work on the employment of solid solutions showing radio-synthesis after the exposure to radiations dates back to 1965 by Mc Laughing et al . 2 . The subsequent works on RCFs can be attributed to the National Institute of Standard and Technology (NIST) 1,3,4 .…”

Section: Introductionmentioning

confidence: 99%

Real-time dosimetry with radiochromic films

Casolaro

Campajola

Breglio

et al. 2019

Sci Rep

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Radiochromic film dosimetry has been widely employed in most of the applications of radiation physics for over twenty years. This is due to a number of appealing features of radiochromic films, such as reliability, accuracy, ease of use and cost. However, current radiochromic film reading techniques, based on the use of commercial densitometers and scanners, provide values of dose only after the exposure of the films to radiation. In this work, an innovative methodology for the real-time reading of radiochromic films is proposed for some specific applications. The new methodology is based on opto-electronic instrumentation that makes use of an optical fiber probe for the determination of optical changes of the films induced by radiation and allows measurements of dose with high degree of precision and accuracy. Furthermore, it has been demonstrated that the dynamic range of some kinds of films, such as the EBT3 Gafchromic films (intensively used in medical physics), can be extended by more than one order of magnitude. Owing to the numerous advantages with respect to the commonly used reading techniques, a National Patent was filed in January 2018.

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“…much lower than those from linear accelerators) incident on water have been reported. In the intermediate energy range (∼0.5 up to ∼3.5 MeV) plane-parallel electron beams generated from Van de Graaf accelerators have been used to obtain experimental DDPs in various materials including air (Nakai 1963, Nakai et al 1965, McLaughlin and Hussman 1970.…”

Section: Introductionmentioning

confidence: 99%

A Monte Carlo study of absorbed dose distributions in both the vapor and liquid phases of water by intermediate energy electrons based on different condensed-history transport schemes

Bousis¹,

Emfietzoglou²,

Hadjidoukas³

et al. 2008

Phys. Med. Biol.

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Monte Carlo transport calculations of dose point kernels (DPKs) and depth dose profiles (DDPs) in both the vapor and liquid phases of water are presented for electrons with initial energy between 10 keV and 1 MeV. The results are obtained by the MC4 code using three different implementations of the condensed-history technique for inelastic collisions, namely the continuous slowing down approximation, the mixed-simulation with delta-ray transport and the addition of straggling distributions for soft collisions derived from accurate relativistic Born cross sections. In all schemes, elastic collisions are simulated individually based on single-scattering cross sections. Electron transport below 10 keV is performed in an event-by-event mode. Differences on inelastic interactions between the vapor and liquid phase are treated explicitly using our recently developed dielectric response function which is supplemented by relativistic corrections and the transverse contribution. On the whole, the interaction coefficients used agree to better than approximately 5% with NIST/ICRU values. It is shown that condensed phase effects in both DPKs and DDPs practically vanish above 100 keV. The effect of delta-rays, although decreases with energy, is sizeable leading to more diffused distributions, especially for DPKs. The addition of straggling for soft collisions is practically inconsequential above a few hundred keV. An extensive benchmarking with other condensed-history codes is provided.

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Measurement of Radiation Dose Distributions with Photochromic Materials

Cited by 16 publications

References 0 publications

Radiochromic Film Dosimetry and its Applications in Radiotherapy

Radiochromic Film Dosimetry and its Applications in Radiotherapy

Real-time dosimetry with radiochromic films

A Monte Carlo study of absorbed dose distributions in both the vapor and liquid phases of water by intermediate energy electrons based on different condensed-history transport schemes

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