Studi Awal Pengukuran Daisy Chaining Detektor Ionisasi pada Berkas Foton 6 MV Flattening Filter Free Lapangan Kecil

Authors

  • Assef Firnando Firmansyah PTKMR BATAN, Jalan Lebak Bulus Raya No. 49, Jakarta, Indonesia
  • Okky Agassy Firmansyah PTKMR BATAN, Jalan Lebak Bulus Raya No. 49, Jakarta, Indonesia
  • Nurman Rajagukguk PTKMR BATAN, Jalan Lebak Bulus Raya No. 49, Jakarta, Indonesia
  • Dea Ryangga RSUD Pasar Minggu, Jalan TB. Simatupang No. 1, Jakarta, Indonesia

DOI:

https://doi.org/10.25077/jif.12.1.16-25.2020

Abstract

Salah satu alternatif untuk melakukan kalibrasi detektor ionisasi kecil pada lapangan radiasi kecil adalah dengan melakukan pengukuran daisy chaining. Makalah ini menguraikan pengukuran daisy chaining detektor ionisasi kecil pada berkas foton 6 MV flattening filter free lapangan radiasi kecil. Langkah pertama pengukuran daisy chaining adalah melakukan kalibrasi detektor ionisasi medium 0,13 cm3 terhadap detektor ionisasi standar 0,6 cm3 pada lapangan radiasi 10 cm × 10 cm. Setelah mendapatkan faktor kalibrasi dosis serap air (ND,W) dari detektor ionisasi medium, langkah berikutnya adalah menggunakan ND,W tersebut untuk mengalibrasi silang detektor ionisasi mikro 0,016 cm3 pada lapangan 5 cm × 5 cm. ND,W hasil kalibrasi tersebut dapat digunakan untuk pengukuran di lapangan radiasi kurang dari 5 cm × 5 cm. Penentuan laju dosis serap air dilakukan di lapangan 3 cm × 3 cm dan 2 cm × 2 cm. Verifikasi dilakukan dengan membandingkan hasil penentuan laju dosis serap air menggunakan ND,W hasil pengukuran daisy chaining, pengukuran langsung menggunakan ND,W detektor ionisasi tanpa pengukuran daisy chaining dan hasil perhitungan dari treatment planning system (TPS). Hasil yang diperoleh menunjukkan adanya perbedaan antara pengukuran daisy chaining, pengukuran langsung, dan hasil perhitungan TPS. Perbedaan masih dalam rentang kurang dari 3%.

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Published

2020-03-04

How to Cite

Firmansyah, A. F., Firmansyah, O. A., Rajagukguk, N., & Ryangga, D. (2020). Studi Awal Pengukuran Daisy Chaining Detektor Ionisasi pada Berkas Foton 6 MV Flattening Filter Free Lapangan Kecil. JURNAL ILMU FISIKA | UNIVERSITAS ANDALAS, 12(1), 16–25. https://doi.org/10.25077/jif.12.1.16-25.2020

Issue

Vol. 12 No. 1 (2020): March 2020

Section

Research Article

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