Study for Multi Channel Radiation Detector Using of Microfilm and Carbon Electrode.
- Author:
Kyo Chul SHIN
1
;
Hyong Geun YUN
;
Dong Hyeok JEONG
;
Yong Kee OH
;
Jhin Kee KIM
;
Ki Hwan KIM
;
Jeung Kee KIM
Author Information
1. Department of Radiation Oncology, Dankook University Hospital, Korea. Yunhg@dkuh.co.kr
- Publication Type:Original Article
- Keywords:
Carbon coated microfilm;
Multi channel detector
- MeSH:
Carbon*;
Electrodes*
- From:Korean Journal of Medical Physics
2005;16(3):111-115
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
We have designed the multi channel detector for the quality assurance of clinical photon beams. The detector was composed of solid phantom inserted by six plane-parallel ionization chambers at different depth. The chamber as a mini plane parallel chamber was made of carbon coated microfilms. In this study the electrical characteristics of the six chambers in the solid phantom were evaluated using 6 MV photon beam. The leakage currents were less than 0.5 pA, reproducibility was less than 0.5%, linearity was less than 0.5%, and dose rate effect was less than 0.7%. In addition the effect of dose variation from other chambers was estimated to maximum 0.8% approximately. The developed detector can be used for quality determination in output dosimetry or measurement of percentage depth dose approximately for clinical photon beam.
