Film Dosimetry

Mossahebi, Sina; Hoshyar, Nazanin; Khan, Rao; Darafsheh, Arash

doi:10.1201/9781351005388-5

Cited by 4 publications

(3 citation statements)

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“…Radiochromic films (RCFs) provide 2D dosimetry over a large area with high spatial resolution which make them convenient dosimeters for beam profile measurement. Furthermore, tissue equivalency and ease‐of‐use are other appealing features of RCFs 63–66 . However, standard practice of RCF dosimetry does not provide real‐time measurement.…”

Section: Considerations On Beam Monitoring Dosimetry and Detector Fea...mentioning

confidence: 99%

Ultra‐high dose rate dosimetry: Challenges and opportunities for FLASH radiation therapy

et al. 2022

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The clinical translation of FLASH radiotherapy (RT) requires challenges related to dosimetry and beam monitoring of ultra‐high dose rate (UHDR) beams to be addressed. Detectors currently in use suffer from saturation effects under UHDR regimes, requiring the introduction of correction factors. There is significant interest from the scientific community to identify the most reliable solutions and suitable experimental approaches for UHDR dosimetry. This interest is manifested through the increasing number of national and international projects recently proposed concerning UHDR dosimetry. Attaining the desired solutions and approaches requires further optimization of already established technologies as well as the investigation of novel radiation detection and dosimetry methods. New knowledge will also emerge to fill the gap in terms of validated protocols, assessing new dosimetric procedures and standardized methods. In this paper, we discuss the main challenges coming from the peculiar beam parameters characterizing UHDR beams for FLASH RT. These challenges vary considerably depending on the accelerator type and technique used to produce the relevant UHDR radiation environment. We also introduce some general considerations on how the different time structure in the production of the radiation beams, as well as the dose and dose‐rate per pulse, can affect the detector response. Finally, we discuss the requirements that must characterize any proposed dosimeters for use in UDHR radiation environments. A detailed status of the current technology is provided, with the aim of discussing the detector features and their performance characteristics and/or limitations in UHDR regimes. We report on further developments for established detectors and novel approaches currently under investigation with a view to predict future directions in terms of dosimetry approaches, practical procedures, and protocols. Due to several on‐going detector and dosimetry developments associated with UHDR radiation environment for FLASH RT it is not possible to provide a simple list of recommendations for the most suitable detectors for FLASH RT dosimetry. However, this article does provide the reader with a detailed description of the most up‐to‐date dosimetric approaches, and describes the behavior of the detectors operated under UHDR irradiation conditions and offers expert discussion on the current challenges which we believe are important and still need to be addressed in the clinical translation of FLASH RT.

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Section: Considerations On Beam Monitoring Dosimetry and Detector Fea...mentioning

confidence: 99%

Ultra‐high dose rate dosimetry: Challenges and opportunities for FLASH radiation therapy

et al. 2022

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“…Radiochromic films (RCFs) are currently used extensively for 2D dose mapping or dosimetry in fields such as radiation therapy and quality assurance. 12,46 The high usability is made possible by the many types of films available for specific applications. Nevertheless, all the widely used radiographic films employ polydiacetylenes as the color-changing materials (GAFchromic TM type), 47 which makes these films single-use only.…”

Section: Resultsmentioning

confidence: 99%

Reusable radiochromic hackmanite with gamma exposure memory

et al. 2022

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“…However, their use for some scenarios, such as two-dimensional (2D) dosimetry, small field dosimetry, in vivo dosimetry, and high temporal resolution dosimetry is sub-optimal. Radiochromic film dosimeters, on the other hand, provide 2D dosimetry at high spatial resolution [6]; however, they cannot be used for real-time measurements [7][8][9]. In this context, radioluminescence-based dosimeters are interesting candidates for RT dosimetry [10,11].…”

Section: Introductionmentioning

confidence: 99%

Radioluminescence fiber optic and imaging dosimetry in radiation therapy

Darafsheh

2024

Optical Sensing and Detection VIII

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Accurate and precise measurement of the radiation energy delivered to and absorbed by the patients' tissues is of great importance in radiation therapy quality assurance. Utilizing radioluminescence of selected materials for radiation detection has shown great potential for developing high spatiotemporal resolution dosimeters for radiation therapy applications. Optical fiber-based scintillator dosimeters are promising candidates for small-field and in vivo dosimetry. Scintillation imaging, on the other hand, is a promising method for multi-dimensional dosimetry. There are, however, challenges associated with these techniques, such as mitigating the impact of Cherenkov radiation and ionization quenching of scintillators in certain radiation fields. Here, we present the progress in radioluminescence dosimetry techniques for radiation therapy applications.

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Film Dosimetry

Cited by 4 publications

References 1 publication

Ultra‐high dose rate dosimetry: Challenges and opportunities for FLASH radiation therapy

Ultra‐high dose rate dosimetry: Challenges and opportunities for FLASH radiation therapy

Reusable radiochromic hackmanite with gamma exposure memory

Radioluminescence fiber optic and imaging dosimetry in radiation therapy

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