Results 191 to 200 of about 15,871 (231)
Some of the next articles are maybe not open access.
In-vivo portal dosimetry by an ionization chamber
Physica Medica, 2005As all methods for in-vivo dosimetry require special efforts many physicists are often discouraged in verifying the middle dose in a patient along the beam central axis. This work reports a practical method for the determination of the middle dose value, D(m), on the central beam axis, using a signal S(t), obtained by a small thimble ion-chamber ...
Piermattei, Angelo +10 more
openaire +3 more sources
2017
In vivo dosimetry is an essential tool in quality-assurance programs. It is important to check the dose delivered to patients undergoing radiation treatment to avoid over or underdosing in areas in which assurance of planning accuracy may be needed. Radiochromic films are uniquely able to measure not only point doses but also two-dimensional maps of ...
Butson, Martin +3 more
openaire +2 more sources
In vivo dosimetry is an essential tool in quality-assurance programs. It is important to check the dose delivered to patients undergoing radiation treatment to avoid over or underdosing in areas in which assurance of planning accuracy may be needed. Radiochromic films are uniquely able to measure not only point doses but also two-dimensional maps of ...
Butson, Martin +3 more
openaire +2 more sources
AIP Conference Proceedings, 2011
In vivo dosimetry has a well established role in the quality assurance of 2D radiotherapy and 3D conformal radiotherapy. The role of in vivo dosimetry for IMRT is not as well established. IMRT introduces a range of technical issues that complicate in vivo dosimetry.
Philip Vial +4 more
openaire +1 more source
In vivo dosimetry has a well established role in the quality assurance of 2D radiotherapy and 3D conformal radiotherapy. The role of in vivo dosimetry for IMRT is not as well established. IMRT introduces a range of technical issues that complicate in vivo dosimetry.
Philip Vial +4 more
openaire +1 more source
Physics in Medicine and Biology, 1997
This paper starts with definitions of radiance, fluence (rate) and other quantities that are important with regard to in vivo light dosimetry. The light distribution in mammalian tissues can be estimated from model calculations using measured optical properties or from direct measurements of fluence rate using a suitable detector.
openaire +3 more sources
This paper starts with definitions of radiance, fluence (rate) and other quantities that are important with regard to in vivo light dosimetry. The light distribution in mammalian tissues can be estimated from model calculations using measured optical properties or from direct measurements of fluence rate using a suitable detector.
openaire +3 more sources
Evaluation of the veridose in vivo dosimetry system
Medical Dosimetry, 2002Recently, a new design of an in vivo diode dosimetry system, VeriDose diodes, has been introduced by Nuclear Associates to verify the radiation dose delivery to patients treated with either photon or electron beams. The goal of this study is to evaluate the linearity, accuracy, reproducibility, energy dependence, and orientation dependence of this ...
Ali S, Meigooni +2 more
openaire +2 more sources
State of the art of in vivo dosimetry
Radiation Protection Dosimetry, 2008The complexity of modern radiotherapy requires a comprehensive quality assurance programme, including in vivo dosimetry. In this paper, the use of the detector systems most often used for in vivo dosimetry [diodes, thermoluminescence detectors, metal oxide field effect transistors and electronic portal imaging devices (EPIDs)] will be summarised ...
openaire +2 more sources
Radiology, 1970
Abstract The authors describe the design and development of systems for direct in vivo measurement of dose within the living subject. They have used the method since 1957 for therapy, diagnosis, nuclear medicine, and radio-biology. The systems include home-grown and commercial luminescent solid state dosimeters of various types and geometries, read-out
B, Roswit +4 more
openaire +2 more sources
Abstract The authors describe the design and development of systems for direct in vivo measurement of dose within the living subject. They have used the method since 1957 for therapy, diagnosis, nuclear medicine, and radio-biology. The systems include home-grown and commercial luminescent solid state dosimeters of various types and geometries, read-out
B, Roswit +4 more
openaire +2 more sources
Miniature semiconductor detectors for in vivo dosimetry
Radiation Protection Dosimetry, 2006Silicon mini-semiconductor detectors are found in wide applications for in vivo personal dosimetry and dosimetry and microdosimetry of different radiation oncology modalities. These applications are based on integral and spectroscopy modes of metal oxide semiconductor field effect transistor and silicon p-n junction detectors.
Rosenfeld, Anatoly B. +6 more
openaire +3 more sources
A Projection Chest Phantom for in vivo Dosimetry
American Industrial Hygiene Association Journal, 1970A unique projection chest phantom has been constructed of very inexpensive materials. This phantom provides for complete variability of chest thickness and incorporates bone structures of a bone-equivalent substance. The phantom contains lung cavities in which doped artificial lungs can simulate any possible lung deposition.
D A, Waite, B V, Andersen, P E, Bramson
openaire +2 more sources
In vivo dosimetry during pelvic treatment
Radiotherapy and Oncology, 1992High precision in vivo entrance and exit dose measurements have been performed with p-type diodes on patients during 8 MV X-ray irradiation of the pelvis, to investigate the accuracy of dose calculations in this region. Based on phantom measurements the accuracy of the p-type diode measuring system itself, i.e.
Heukelom, S. +2 more
openaire +4 more sources