VERIFIKASI DOSIMETRI TEKNIK STEREOTACTIC BODY RADIOTHERAPY (SBRT) METASTASIS TULANG: STUDI KASUS MENGGUNAKAN FANTOM HOMOGEN DAN INHOMOGEN

Yosi Sudarsi Asril; Wahyu Edy Wibowo; Supriyanto A. Pawiro

doi:10.21009/0305020306

Yosi Sudarsi Asril Departemen Fisika Fakultas MIPA, Jln. Lingkar Kampus Raya, Depok 16424
Wahyu Edy Wibowo Departemen Radioterapi RSUP Cipto Mangunkusumo, Jln. Diponegoro No. 71, Jakarta Pusat 10430
Supriyanto A. Pawiro Departemen Fisika Fakultas MIPA, Jln. Lingkar Kampus Raya, Depok 16424

DOI: https://doi.org/10.21009/0305020306

Abstract

Cancer causes 13% of all cases the cause of death, and bone metastases is a common complication of cancer that occurs above 40% in oncology patients. Stereotactic Body Radiotherapy (SBRT) is one technique that can handle bone metastases because it can provide a high radiation dose to a small volume with a very tight margin. In the planning of radiotherapy for high-energy photons are often not suitable to estimating dose distribution in inhomogeneous material. Therefore, compared the dose results of two phantom that has a different density, the homogeneous phantom (CIRS Model 002 H9K) and inhomogeneous phantom (CIRS Model 002 LFC) using three dosimeter; microchamber Exradin A16, Gafchromic Film EBT3, and TLD LiF: Mg, Ti rods. The result from both phantom measurements prove that the gafchromic filn EBT3 is the best dosimeter in measuring dose in small field with descripansies dose 0,62% and 1,041% in homogeneous and inhomogeneous phantom. Mikrochamber Exradin A16 also showed the ability to get descripansies -0,51% and -2,61% in homogeneous and inhomogeneous phantom. While descripansies using the TLD LiF:Mg, Ti rods is -11,81% and -12,19% in homogeneous and inhomogeneous phantom.

Keywords: Bone Metastasis, SBRT, Mikrochamber Exradin A16, Gafchromic Film EBT3, TLD LiF:Mg, Ti rods.