TY - JOUR
T1 - Radioluminescence results from an Al2O3:C fiber prototype: 6 MV medical beam
AU - de Freitas Nascimento, Luana
AU - Vanhavere, Filip
AU - Veronese, Ivan
AU - Loi, Gianfranco
AU - Monoes, E
AU - Verellen, Dirk
N1 - Score=10
PY - 2018/5/1
Y1 - 2018/5/1
N2 - The Investigations of this article focus on the response of an Al2O3:C radioluminescence (RL) prototype for medical dosimetry in a 6 MV photon beam. The prototype can be configured using two types of detectors coupled to fiber-optic cables - single crystal (1 × 1 × 2 mm3) and droplets (in two grain sizes, 38 and 4 μm, molded in r = 0.5 mm, l = 200 μm). By using the appropriate filters in addition to time gating it is possible to remove disturbance present during irradiation: the stem effect. Pre-irradiation of the dosimeters to a dose of 300 Gy made the memory effects in Al2O3:C negligible, so as to not impair the dosimetric properties of the system. The key findings are that the system is suitable for small field beam dosimetry, while giving overall good dose response in other features (i.e., beam profile, dose rate - FF and FFF modes). The results show that our prototype can be used for real time dose rate assessment in medical photon dosimetry without many correction factors. The 4 μm RL measurement results are in excellent agreement (i.e. below 1%) with the dose delivered according to standard beam data.
AB - The Investigations of this article focus on the response of an Al2O3:C radioluminescence (RL) prototype for medical dosimetry in a 6 MV photon beam. The prototype can be configured using two types of detectors coupled to fiber-optic cables - single crystal (1 × 1 × 2 mm3) and droplets (in two grain sizes, 38 and 4 μm, molded in r = 0.5 mm, l = 200 μm). By using the appropriate filters in addition to time gating it is possible to remove disturbance present during irradiation: the stem effect. Pre-irradiation of the dosimeters to a dose of 300 Gy made the memory effects in Al2O3:C negligible, so as to not impair the dosimetric properties of the system. The key findings are that the system is suitable for small field beam dosimetry, while giving overall good dose response in other features (i.e., beam profile, dose rate - FF and FFF modes). The results show that our prototype can be used for real time dose rate assessment in medical photon dosimetry without many correction factors. The 4 μm RL measurement results are in excellent agreement (i.e. below 1%) with the dose delivered according to standard beam data.
KW - Radioluminescence
KW - Real time dosimetry
KW - radiotherapy
KW - small field
KW - droplets
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/29972774
U2 - 10.1016/j.sna.2018.03.007
DO - 10.1016/j.sna.2018.03.007
M3 - Article
SN - 0924-4247
VL - 274
SP - 1
EP - 9
JO - Sensors and Actuators A: Physical
JF - Sensors and Actuators A: Physical
ER -