CORRECTION OF 2D ISODOSE CURVE ON THE SLOPING SURFACE USING TISSUE AIR RATIO (TAR) METHOD
ABSTRACT: The curve of 2D
isodose is used to determine the dose distribution in patient treated by
radiotherapy. Therefore, isodose curve is very useful for planning and
evaluating of the dose received by the patient. Correction of 2D isodose curve
for sloping surface is very important due to the skin of patient is not flat.
In this study, the correction of isodose curve was calculated using tissue air
ratio (TAR) method for radiation field size of 10x10 cm2. The correction factor
was obtained by comparison of TAR value for effective depth and TAR value for
total depth. The correction factor then was multiplied to isodose curve for
flat surface. In this study, the software for calculating the automated
correction factor due to sloping of patient surface has been successfully
developed. It was found that if the sloping of patient surface increases then
the corrected isodose curve increases.
Penulis: Nurul Firdausi
Nuzula, Kusworo Adi, Choirul Anam
Kode Jurnal: jpmatematikadd150844
