Korean J Med Phys.
2011 Sep;22(3):148-154.
Study on the Evaluation of TRS-398 Quality Factors with Central Electrode Corrections for Small Cylindrical Chambers
- Affiliations
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- 1Research Center, Dongnam Inst. of Radiological & Medical Sciences, Busan, Korea. physics7@empal.com
- 2Department of Rad. Oncology, Dongnam Inst. of Radiological & Medical Sciences, Busan, Korea.
- 3Department of Physics, Dong-A University, Busan, Korea.
- 4Department of Radiation Science & Technology, Chonbuk National University, Jeonju, Korea.
Abstract
- The quality factors (kQ,Q0) were evaluated by appling the results recently studied for the effect of central electrode in TRS-398 protocol. The PTW-31010 and IBA-CC13 chambers were used in this study. The quality factors were calculated as a function of beam quality for high energy electron and photon beams and compared with data currently used in TRS-398 protocol. In the PTW-31010 chamber using aluminium electrode, appling the new central electrode collections, the quality factors were 0.4% and 0.9% higher than current TRS-398 data for high energy photon and electron beams respectively. In the IBA-CC13 chamber using C-552 electrode, there are no variations in quality factors compared to TRS-398 data currently used.
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