Characterization of Fricke-gel layers for absolute dose measurements in radiotherapy

Conference · Fri Jul 01 04:00:00 EDT 2011

DOI:https://doi.org/10.1109/ANIMMA.2011.6172969· OSTI ID:22039820

Gambarini, G ^[1]; Carrara, M ^[2]; Rrushi, B; Guilizzoni, R ^[1]; Borroni, M; Tomatis, S ^[2]; Pirola, L ^[1]; Battistoni, G ^[3]

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1. Dept. of Physics, 'Universita degli Studi' of Milan, via Celoria 16, I-20133 Milano (Italy)
2. Medical Physics Unit, Fondazione IRCCS Istituto Nazionale Tumori, Via Venezian 1, I-20133 Milano (Italy)
3. INFN Istituto Nazionale di Fisica Nucleare Section Milan, via Celoria 16, I-20133 Milano (Italy)

Fricke-gel layer dosimeters (FGLDs) have shown promising features for attaining absolute measurements of the spatial distribution of the absorbed dose in radiotherapy. Good precision of results (within 3%) is achieved by means of calibration of each single dosimeter before measurement. The calibration is performed irradiating the dosimeter at a uniform and precisely known dose, in order to get a calibration matrix that must be used, with pixel-to-pixel manipulation, to obtain the dose image. A study of the trend in time of dosimeter response after one or more exposures was carried out and calibration protocols were suitably established and verified. (authors)

• OSTI ID: 22039820
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
62 RADIOLOGY AND NUCLEAR MEDICINE
ABSORBED RADIATION DOSES
ACCURACY
CALIBRATION
DOSEMETERS
DOSIMETRY
GELS
IMAGES
RADIOTHERAPY
SPATIAL DISTRIBUTION