Pengukuran Nilai CT Number Pada Phantom CIRS 062m Sebagai Data Input Kalkulasi Dosis Program ISIS 3d Di Treatment Planning System

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Published: Mar 20, 2019
DOI: https://doi.org/10.47313/jig.v17i2.541
Keywords:
CT number Densitas Elektron kurva DVH

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Purwantiningsi Purwantiningsi
Program Studi Fisika, Universitas Nasional
Hadi Lesmana
Program Studi Fisika, Universitas Nasional

Abstract

Telah dilakukan pengukuran nilai CT number pada pesawat CT Scan Simulator
General Elektrik di RSPAD Gatot Soebroto Jakarta dengan menggunakan phanthom CIRS
062 dengan berbagai variasi nilai jaringan ( lung inhale, lung exhale, adipose, breast, water,
muscle, liver, bone 200, bone 800 ), dilakukan scanning phantom dengan ketebalan slices
10 mm, kV 100, mAs 190. Pengukuran CT number dilakukan dengan memberi tanda
lingkaran pada setiap objek jaringan dengan diameter lingkaran Region Of Interest (ROI)
yang sama, maka didapatkan hasil CT number ( Lung inhale ; -800.9, Lung exhale ; -492.1,
Adipose ; -66.8, Breast ; -30.2, Water ; -7.7, Muscle ; 47.5, Liver ; 56.2, Bone 200 ; 255.3,
bone 800 ; 929 ). Hasil nilai pengukuran CT number jaringan di input kedalam program iSis
3D yang terdapat di TPS (Treatment Planning Sistem). Hasil kalkulasi dosis dilakukan
menggunakan sampel planning pada organ paru pada program iSis 3D dengan
menggunakan energi elektron 8 MeV dan didapatkan hasil perbedaan sebelum dan sesudah
dimasukan nilai densitas elektron dalam kurva DVH (dose volume histogram). hasil yang
didapat dari bacaan kurva DVH antara sebelum dan sesudah dimasukan nilai densitas
menyatakan bahwa selisih perbedaan pada daerah jaringan paru sebelah kanan akumulasi
dosis rata-rata (Dmean) 3.6 % pada volume 2080 cm3, pada daerah jaringan paru sebelah
kiri dosis rata-rata (Dmean) 2.4% pada volume 1271 cm3, dan pada organ jantung dosis
rata-rata (Dmean) 1,36% pada volume 199,4 cm3.

Article Details

How to Cite
Purwantiningsi, P., & Lesmana, H. (2019). Pengukuran Nilai CT Number Pada Phantom CIRS 062m Sebagai Data Input Kalkulasi Dosis Program ISIS 3d Di Treatment Planning System. Jurnal Ilmiah Giga, 17(2), 70–78. https://doi.org/10.47313/jig.v17i2.541
Issue
Vol. 17 No. 2 (2014): Volume 17 Edisi 2 Tahun 2014
Section
Articles

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