CIFICEN   24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Angular characterization of the response of an YVO 4 :Eu 3+ -based radioluminescence probe under linac irradiation
Autor/es:
FERNANDEZ, Y.; MARTIN SANTIAGO; MARCAZZÓ, J.; MARTÍNEZ, N.; MOLINA, P.
Lugar:
Santo Domingo
Reunión:
Simposio; XVII International Symposium on Solid State Dosimetry 2017; 2017
Resumen:
Real-time dosimetry in radiotherapy with high spatial resolution is a constantly growingresearch field. Accurate radiotherapy techniques such as, gynaecological brachytherapy,intensity-modulated radiation therapy, intraoperative radiation therapy, stereotacticradiosurgery, among others, require dosimeters with the characteristics mentioned before.Even though different kinds of detection systems have been investigated to perform in-vivodosimetry, most of them do not provide simultaneously spatial resolution, real-time doseassessment and intracavitary measurements. The so-called fiberoptic dosimetry (FOD)technique has shown to meet most of these requirements mostly needed in radiotherapy [1].This technique is based on the use of a tiny piece of a scintillation crystal, which is attachedat the end of an optical fiber [1]. The fiber collects the light emitted by the scintillatorduring irradiation (radioluminescence, RL) and a light detector placed at the other extremeof the optical fiber measures its intensity. FOD technique allows for in-vivo and real-timedose assessment, and due to the small size of the detector it not only permits accuratemeasurements in regions of high dose gradients but also intracavitary measurements [2].Martinez et al. [3] observed angular dependency of the scintillating signal when cylindricaldetectors are employed as usual in this technique.In the present work we report the angular response of a YVO 4 :Eu 3+ based FOD probe.YVO 4 :Eu 3+ powder was dispersed in UV curing adhesive to obtain a 1mm diameterspherically shaped detector, which was glued at the end of an optical fiber.[1] Justus, B.L. et al., 2004. Gated fiber-optic-coupled detector for in vivo real-time radiationdosimetry. Appl. Opt. 43, 1663-1668.[2] Spasic, E., et al., 2011. Intracavitary in vivo dosimetry based on multichannel fibercoupledradioluminescence and optically stimulated luminescence of Al 2 O 3 :C. In: IEEE ConferencePublication. 2nd International Conference on Advancements in Nuclear InstrumentationMeasurement Methods and Their Applications (ANIMMA), pp. 1-6.[3] N Martinez, A Rucci, J Marcazzó, P Molina, M Santiago, W Cravero, 2017. Characterization ofYVO 4 :Eu 3+ scintillator as detector for Fiber Optic Dosimetry. Radiation Measurements, in press.