Bibliographic Citation
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DOI | 10.1118/1.1469634 |
Title | A correction method for diamond detector signal dependence with proton energy |
Creator/Author | Fidanzio, A. ; Azario, L. ; De Angelis, C. ; Pacilio, M. ; Onori, S. ; Kacperek, A. ; Piermattei, A. [Istituto di Fisica, Universita Cattolica del S. Cuore, Rome (Italy) ; Istituto Superiore di Sanita, Rome (Italy) ; Douglas Cyclotron Unit, Clatterbridge Centre for Oncology, Bebington, Merseyside CH63 4JY (United Kingdom) ; Instituto di Fisica, Universita Cattolica del S. Cuore, Largo F. Vito 1, 00168 Rome (Italy)] |
Publication Date | 2002 May 01 |
OSTI Identifier | OSTI ID: 20419815 |
Other Number(s) | Journal ID: ISSN 0094-2405; MPHYA6; TRN: US03B2149004220 |
Resource Type | Journal Article |
Resource Relation | Journal: Medical Physics; Journal Volume: 29; Journal Issue: 5; Other Information: DOI: 10.1118/1.1469634; (c) 2002 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); PBD: May 2002 |
Subject | 61 RADIATION PROTECTION AND DOSIMETRY; CALIBRATION; DOSEMETERS; DOSIMETRY; ELECTRON DOSIMETRY; LET; QUALITY ASSURANCE; QUALITY CONTROL; RADIATION DETECTORS; RADIOTHERAPY; SEMICONDUCTOR DETECTORS |
Description/Abstract | Small dosimeters as solid state detectors can be useful for the dosimetric characterization and periodic quality control of radiotherapy proton beams. The calibration of solid state detectors for proton beams is not a solved problem especially for ophthalmologic proton beams, where these detectors present a LET-dependent signal. In this work a PTW diamond detector has been selected because of its good signal reproducibility (0.3%) and stable response with accumulated dose. A method that takes into account the LET dependence of the diamond detector signal, at 62 MeV proton beam, is here proposed. In particular an empirical correction factor, k{sub Eo}{sup DD}(R{sub res}), has been determined as a function of the residual range quality index, to correct the diamond detector signal for a proton beam of incident effective energy E{sub 0}=62 MeV. A dedicated software allows us to use the diamond detector as an on-line reference dosimeter, where an ionization chamber may be difficult to use, or for periodic quality control procedures. The article also reports a comparison between the signal dependence on proton energy of silicon, diamond, and radiochromic film detectors. |
Country of Publication | United States |
Language | English |
Format | Size: page(s) 669-675 |
System Entry Date | 2004 Jul 13 |
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