| dc.description.abstract | This study aims to characterize silicone rubber, alginate, and wood sawdust as
radiotherapy bolus at 8 MeV and 10 MeV energy. Radiotherapy bolus is used in
radiation therapy to increase the radiation dose to tumor tissue while protecting the
surrounding healthy tissue. The process of making the radiotherapy bolus begins
with sieving the sawdust powder through a 200 mesh sieve. Mixing all radiotherapy
bolus materials such as silicone rubber, alginate, Catalist bluesil, and wood sawdust
as filler, and then molded into sizes of 0.5 cm, 1 cm, 1.5 cm, and 2 cm, followed by
oven curing at a temperature of 30°C. The method used in the production of the
radiotherapy bolus is the melt intercalation method. The radiotherapy bolus is
characterized to determine the values of physical properties (density, porosity, and
water absorption), mechanical properties (tensile strength, elastic modulus, and
elongation), performance properties (relative electron density and surface dose
absorption), SEM, and FTIR. The results of the physical property tests indicate that
the optimum density value is 1.80 g/cm3, porosity is 20%, and water absorption is
12,5%. The mechanical properties show an optimum tensile strength of 0.85 MPa,
elastic modulus of 0.66MPa, and elongation of 198.24%. The performance property
tests show an optimum relative electron density of 1.26 and surface dose absorption
at 8 MeV energy of 113.27% and at 10 MeV energy of 113.48%. The SEM analysis
reveals an average pore diameter of 21.25 μm. The FTIR analysis of the
Radiotherapy Bolus shows peaks at 3384.97 cm-1 corresponding to the O-H
functional group, 2962.8 cm-1 for the C-H functional group, 1256.64 cm-1 for the CO
functional group, 1014.01 cm-1 for the Si-O-Si functional group, and 790.14 cm-1
for the Si-CH functional group. | en_US |
