Verifikasi Nilai Monitor Unit terhadap Dosis Keluaran Berkas Radiasi Elektron pada Pesawat Terapi LINAC CX
DOI:
https://doi.org/10.25077/jfu.13.2.211-217.2024Keywords:
dosis keluaran, energi, LINAC, monitor unitAbstract
Telah dilakukan penelitian tentang verifikasi nilai monitor unit terhadap dosis keluaran berkas radiasi elektron pada pesawat LINAC CX. Verifikasi ini bertujuan untuk mengetahui dosis keluaran berkas radiasi elektron sesuai dengan nilai monitor unit yang dimasukkan pada pesawat terapi LINAC CX. Penelitian dilakukan pada fantom air yang berada di sumbu pusat penyinaran dengan Source Surface Distance (SSD) 100 cm, luas lapangan penyinaran 10x10 cm, dan perangkat aplikator elektron berukuran 10x10 cm. Sebelum dilakukan penyinaran, Plane Parallel Chamber (PPC) dimasukkan pada fantom air sebagai detektor dan terhubung ke elektrometer. Variasi nilai monitor unit yang digunakan yaitu 50, 100, 150, 200, 250, 300, 350, dan 400 MU/menit. Hasil dosis keluaran berkas radiasi elektron pada energi 6 MeV mengalami penyimpangan dosis rata-rata 0,54% dan pada energi 9 MeV yaitu 0,10%. Penyimpangan ini tidak berpengaruh terhadap keselamatan pasien dan masih dalam batas toleransi yang ditetapkan TRS 398 IAEA yaitu <3%.References
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