Measurement of Backscattered Radiation from Secondary Collimator Jaws into the Beam Monitor Chamber from a Dual Energy Linear Accelerator

被引：0
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作者：
Manickam Ravikumar
Ramamoorthy Ravichandran
机构：
[1] Department of Radiation Physics,
[2] Kidwai Memorial Institute of Oncology,undefined
[3] Bangalore,undefined
[4] India,undefined
来源：
Strahlentherapie und Onkologie | 2001年 / 177卷
关键词：
Key Words: Monitor chamber; Collimator scatter; Asymmetric fields; Telescopic analysis; Schlüsselwörter: Messkammer; Kollimatorstreuung; Asymmetrische Felder; Teleskopische Analyse;
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学科分类号：
摘要：
The photons and electrons backscattered from the upper and lower secondary collimator jaws give rise to a significant increase in the ion charge measured by the monitor chamber, and this increase varies between different accelerators. We have studied the effect of backscatter into the monitor chamber at 6 MV and 18 MV photon energies for the linear accelerator Clinac-1800.
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页码：670 / 675
页数：5
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