Results 131 to 140 of about 18,198 (165)
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Verification of IMRT fields by film dosimetry
Medical Physics, 2003In intensity modulated radiation therapy (IMRT) the aim of an accurate conformal dose distribution is obtained through a complex process. This ranges from the calculation of the optimal distribution of fluence by the treatment planning system (TPS), to the dose delivery through a multilamellar collimator (MLC), with several segments per beam in the ...
BUCCIOLINI, MARTA +2 more
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A Note on Mylar Film Dosimetry
Radiation Research, 1961The ultraviolet transmission of Mylar films, 0.00025 inch and 0.007 inch thick, can be used as a dosimeter to cover the absorbed dose range from 5 x 10/ sup 6/ rads to 10/sup 9/ rads. The 0.007-inch film exhibits a rapid initial fading in optical density, arriving at a constant value in less than 24 hours, whereas the 0.00025-inch Mylar is free from ...
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Effect of processor temperature on film dosimetry
Medical Dosimetry, 2012Optical density (OD) of a radiographic film plays an important role in radiation dosimetry, which depends on various parameters, including beam energy, depth, field size, film batch, dose, dose rate, air film interface, postexposure processing time, and temperature of the processor.
Indra J. Das, S Srivastava
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Ultraviolet radiation dosimetry with radiochromic film
Physics in Medicine and Biology, 2000Radiochromic film is tested for its broad-band response to ultraviolet (UV) B (290-320 nm) and A (320 nm400 nm), visible and infrared radiation produced by a solar simulator and examined for dosimetry in ultraviolet radiation. Results show that MD-55-2 radiochromic film in solar and fluorescent light sources responds almost exclusively to broad-band ...
Donna Abbati +5 more
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Dosimetry of blood irradiation with radiochromic film
Transfusion Medicine, 1999It has been shown that radiochromic film is an ideal dosimeter for assessment and verification of delivered dose to irradiated blood products. Using a parallel opposing two‐field technique on a medical linear accelerator, blood is irradiated to diminish the risk of transfusion‐associated graft vs. host disease (TA‐GVHD).
Anthony Arnold +6 more
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Entrance surface dosimetry with radiophotoluminescent films
Radiation Measurements, 2020Abstract In a wide international cooperation, thin dosimetric films were developed for radiation protection and clinical dosimetry applications. The goal was providing proof of principle of a novel approach to entrance surface dosimetry, in general, and to extremity dosimetry, in particular.
Luigi Lazzeri +11 more
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Radiation Measurements, 2006
Abstract The object of this paper is to give a new user some practical information on the use of radiochromic films for medical applications. While various aspects of radiochromic film dosimetry for medical applications have been covered in some detail in several other excellent review articles which have appeared in the last few years [Niroomand-Rad,
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Abstract The object of this paper is to give a new user some practical information on the use of radiochromic films for medical applications. While various aspects of radiochromic film dosimetry for medical applications have been covered in some detail in several other excellent review articles which have appeared in the last few years [Niroomand-Rad,
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Verification of brachytherapy dosimetry with radiochromic film
Medical Dosimetry, 1999The aim of this work is to empirically validate the optimized dose distribution calculated by the Nucletron Brachytherapy Planning System (v. 13.3) at a distance of 1.0 cm from a stepping source of high-dose-rate-iridium 192 (192Ir). The longitudinal dose distribution at 1.0 cm from a straight pathway of multiple-source positions is measured using ...
T Wong +6 more
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Polaroid Film in Radiation Dosimetry and Survey
Radiology, 1971Abstract The authors initiated a study of the use of Polaroid films in radiation dosimetry and surveys; in particular, the response of various types of Polaroid films to radiation output from different sources. A good correlation was found between the readings from a Victoreen R-chamber and from Polaroid film, regardless of whether a 300 kVp machine or
S. Stefani, H. Levan, S. J. Hage
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A prototype quantitative film scanner for radiochromic film dosimetry
Medical Physics, 2008We have developed a high resolution, quantitative, two-dimensional optical film scanner for use with a commercial high sensitivity radiochromic film (RCF) for measuring single fraction external-beam radiotherapy dose distributions. The film scanner was designed to eliminate artifacts commonly observed in RCF dosimetry. The scanner employed a stationary
M Ranade +5 more
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