Results 171 to 180 of about 4,735 (211)
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Radiochromic film dosimetry for clinical proton beams
Applied Radiation and Isotopes, 1997Depth doses and lateral profiles for proton beams with energies of 100-250 MeV were measured with a high-sensitivity GafChromic MD-55 film, which requires no post-irradiation development. The exposed MD-55 films were evaluated with the RIT 113 film dosimetry system.
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Radiochromic film as a radiotherapy surface-dose detector
Physics in Medicine and Biology, 1996Radiochromic film is shown to be a useful surface-dose detector for radiotherapy x-ray beams. Central-axis percentage surface-dose results as measured by Gafchromic film for a 6 MVp x-ray beam produced by a Varian 2100C Linac at 100 cm SSD are 16%, 25%, 35%, 41% for 10, 20, 30 and 40 cm square field sizes, respectively.
M J, Butson, J N, Mathur, P E, Metcalfe
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Radiochromic EBT2 film dosimetry for low‐energy protontherapy
Medical Physics, 2011Purpose:In protontherapy, accessories are used in order to adapt the beam to the surface and to the depth of the target. They are positioned close to the patient in order to avoid perturbation effects related to proton scattering. The level of contamination of the beam caused by these accessories may be assessed by examining the dose maps in parallel ...
G, Angellier, M, Gautier, J, Herault
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Radiochromic film dosimetry: Past, present, and future
Physica Medica, 2011In radiation therapy, an accurate dose determination and a precise dose delivery to the tumour are directly associated with better treatment outcomes in terms of higher tumour control and lower post radiation therapy complications. Over the years, film dosimetry was developed into a powerful tool for radiotherapy treatment verification and quality ...
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Reference radiochromic film dosimetry: Review of technical aspects
Physica Medica, 2016For decades, film was used as a powerful two-dimensional (2D) dosimetry tool for radiotherapy treatment verification and quality assurance. Unlike the old silver-halide based radiographic films, radiochromic films change its color upon irradiation without the need for chemical development.
Slobodan, Devic +2 more
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Adaptability of Radiochromic films in mammography
2022Purpose: Mammography is considered one of the most effective diagnostic methods for the early detection of breast cancer and is routinely performed in many countries worldwide [1-3]. However, it carries the risk of radiation-induced breast cancer.
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Polarization effects on a high-sensitivity radiochromic film
Physics in Medicine and Biology, 2003A new high-sensitivity radiochromic film has been tested for its polarization properties. Gafchromic HS film has been shown to produce a relatively small (less than 3%) variation in the optical density measured at 660 nm wavelength when the light source is fully linear polarized and the film is rotated through a 360 angle.
Martin J, Butson +3 more
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Radiochromic film dosimetry of contrast-enhanced radiotherapy (CERT)
Physics in Medicine and Biology, 2006Contrast-enhanced radiotherapy (CERT) employs elevated concentrations of high-Z contrast media in targets to dramatically increase the absorbed dose of radiation relative to the surrounding tissues. However, it is difficult to measure the dose enhancement with routine clinical instruments because the photoelectrons and Auger electrons produced by the ...
Kevin N, Morris +2 more
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Measuring solar UV radiation with EBT radiochromic film
Physics in Medicine and Biology, 2010Ultraviolet radiation dosimetry has been performed with the use of a radiochromic film dosimeter called Gafchromic EBT for solar radiation exposure. The film changes from a clear colour to blue colour when exposed to ultraviolet radiation and results have shown that the colour change is reproducible within ±10% at 5 kJ m(-2) UV exposure under various ...
Ethan T, Butson +3 more
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Novel Radiochromic Films for Clinical Dosimetry
Radiation Protection Dosimetry, 1996New transparent radiochromic films, GafChromic MD-55 and NMD-55, which turn from colourless to deep blue upon irradiation, have been designed particularly for measuring radiation therapy absorbed doses (1 Gy to 100Gy). They are also useful for high resolution mapping of dose distributions, radiographic imaging, treatment planning dosimetry, beam ...
W.L. McLaughlin +7 more
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