Research Information System
OPEN CHEMISTRY, vol.20, no.1, pp.61-68, 2022 (Journal Indexed in SCI Expanded)
In this study, the feasibility of using electronic
portal imaging device (EPID) as an analysing equipment
for bolus material was evaluated in terms of its dosimetric
parameters. Seven superflab bolus material samples, 4
samples of 0.5 cm (S1–S4) and 3 samples of 1 cm thickness (S5–S7), were analysed and compared with tissue
equivalent water phantom, which was selected for reference material. Gamma analysis method was used to evaluate the dose distribution of the boluses. In addition,
487,204 point-dose values of each bolus were compared
with the point-doses of corresponding reference material
by using Spearman’s correlation coefficient analysis. The
passing rates varied from 58.3 to 100% for 0.5 cm thick
samples, and on the other hand, the passing rates of all
the 1 cm thick boluses were 100%. All the correlation
coefficient values were above 0.975. The correlation was
statistically significant for all the samples (p < 0.001). The
correlation coefficient of S4 bolus sample was the highest
among the 0.5 cm thick bolus samples with a result
of 0.989. Likewise, S5 and S6 bolus samples were the
highest among the 1 cm thick ones with a result of
0.995. The results indicated that the material planned
to be used as bolus can be evaluated with EPID in
daily use.