A calibration was obtained using a 6 MV photon beam from clinical accelerator and the dose measurement precision was tested using a range of doses and different dose distributions (flatPurpose: Modern radiotherapy modalities often use small or nonstandard fields to ensure highly localized and precise dose delivery, challenging conventional clinical dosimetry protocols. The OSL image signal-to-noise ratio obtained in the current conditions require further improvement. The dose measured with the films was compared to the calculated dose from the Eclipse planning system using the Anisotropic Analytical Algorithm (AAA). Brauer-Krisch, E., Rozenfeld, A., Lerch, M., Petasecca, M., Akselrod, M., Sykora, J., Bartz, J., Ptaszkiewicz, M., Olko, P., Berg, A., Wieland, M., Doran, S., Brochard, T., Kamlowski, A., Cellere, G., Paccagnella, A., Siegbahn, E. A., Prezado, Y., Martinez-Rovira, I., Bravin, A., Dusseau, L. and Berkvens, P. (2010). The beams are well resolved and the full width at halfmaximum agrees with the nominal width of the beams.
This paper will give an overview of all dosimeters tested in the past at the ESRF with their advantages and drawbacks.
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Dosimetric quantities were measured in filtered white beams, with a weighted mean energy of 95 keV, in broadbeam and spatially fractionated geometries, and compared to reference dosimeters. Crossref Results: 77 dose measurements were compared to either ion chamber measurements or dose calculations (reference).
Microbeam Radiation Therapy (MRT) uses highly collimated, quasi-parallel arrays of X-ray microbeams of 50-600 keV, produced by 2nd and 3rd generation synchrotron sources, such as the National Synchrotron Light Source (NSLS) in the U.S., and the European Synchrotron Radiation Facility (ESRF) in France, respectively. Results: The dosimeters are dose rate independent up to 410{sup 9} Gy/s within 2% (OSL and TLD) and up to 1510{sup 9} Gy/s within 5% (EBT films).
The mean ± SD of the absolute dose was calculated for each nanoDot OSL dosimeter and compared with the planned absolute dose.
The experimental data are compared with Monte Carlo calculations. Furthermore two diamond detectors were tested.
Ils servent à mesurer les doses reçues, de rayonnement β, X, γ et neutron en donnant une réponse différée. The extensive use of computed tomography (CT) in diagnostic procedures is accompanied by a growing need for more accurate and patient-specific dosimetry techniques.
Methods: We prepared Al{sub 2}O{sub 3}:C OSLDs from the same material as commercially available nanoDot dosimeters (Landauer, Inc).
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Each delivery of OSL monitors will include a control monitor. The detector response is independent of dose-rate in the range 1–700 Gy/s.
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Measured dose profiles of lung and vertebra treatment plans agreed very well with the calculations.