Simulasi Monte Carlo Menggunakan Perangkat Lunak PRIMO pada Commissioning Akselerator Linear Varian TrueBeam 10 MV FFF
Muhammad Adithya Pradhana, M. Arif Efendi, S.Si., M.Sc., Ph.D. ; Ir. Ester Wijayanti, M.T.
2026 | Skripsi | TEKNIK NUKLIR
LINAC medis merupakan akselerator linear yang digunakan untuk
mempercepat elektron hingga mencapai energi kinetik antara 4–25 MeV dengan
memanfaatkan medan gelombang mikro radio frekuensi nonkonservatif. Pada
tahun 2020 terdapat 55 LINAC di Indonesia. Dibutuhkan waktu 4 – 6 minggu bahkan
lebih untuk memproses commissioning LINAC. Dengan menggunakan perangkat
lunak PRIMO yang memanfaatkan kode Monte Carlo diharapkan dapat memudahkan dan
mempersingkat waktu yang dibutuhkan untuk commissioning LINAC.
LINAC yang digunakan
adalah Varian TrueBeam 10 MV FFF dengan ukuran lapangan 10x10 cm. Perlu
dibuktikan hasil simulasi PRIMO memiliki kesesuaian dengan data golden beam.
Dengan menggunakan metode analisis indeks gamma, hasil simulasi PRIMO
dikomparasi dengan data golden beam. Hasil percentage passing
criteria dan grafik dapat menunjukan apakah hasil simulasi PRIMO sesuai
dengan data golden beam.
Dengan pasing rate senilai
1%/1mm, didapatkan nilai percentage passing criteria untuk PDD senilai
99,33%. Sementara beam profile untuk kedalaman 2,4 cm senilai 92,57%,
kedalaman 5 cm senilai 94,09%, kedalaman 10 cm senilai 89,42%, kedalaman 20 cm
senilai 95,41%, kedalaman 30 cm senilai 86,84%. Hasil nilai tersebut dapat
disimpulkan PRIMO dapat direkomendasikan digunakan dalam proses commissioning
untuk mempercepat prosesnya.
Medical
LINAC is a linear accelerator used to accelerate electrons to kinetic energies
ranging from 4–25 MeV by utilizing non-conservative radiofrequency microwave
fields. In 2020, there were 55 LINAC units in Indonesia. The commissioning
process for a LINAC requires approximately 4–6 weeks or even longer. By
utilizing the PRIMO software, which is based on the Monte Carlo method, the
time required for LINAC commissioning is expected to be reduced.
The LINAC used
in this study was the Varian TrueBeam 10 MV FFF with a field size of 10 × 10
cm². It is necessary to verify that the PRIMO simulation results are consistent
with the golden beam data. Using the gamma index analysis method, the PRIMO
simulation results were compared with the golden beam data. The percentage
passing criteria values and graphical analysis were used to determine whether
the PRIMO simulation results were in agreement with the reference data.
With a passing
rate criterion of 1%/1 mm, the percentage passing criterion obtained for the
PDD was 99.33%. Meanwhile, the percentage passing criteria for the beam profile
were 92.57% at a depth of 2.4 cm, 94.09% at 5 cm, 89.42% at 10 cm, 95.41% at 20
cm, and 86.84% at 30 cm depth. Based on these results, it can be concluded that
PRIMO is recommended for use in the LINAC commissioning process in order to
accelerate the procedure.
Kata Kunci : Radioterapi, Akselerator Linear, PRIMO
