J Korean Soc Ther Radiol.
1992 Jun;10(1):121-123.
Determination of the Phantom Scatter Factor (Sp Factor) using a small Block in the Phantom
- Affiliations
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- 1Department of Therapeutic Radiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.
- 2Department of Therapeutic Radiology, Hanyang University Hospital, College of Medicine, University of Hanyang, Seoul, Korea.
Abstract
- New measurement method for Sp factors (Phantom Scatter Factors) is presented. The theoretical development of the approach is disscused showing that Sp factors can be obtained from three measurements of ionnization in a blocked, reference field and open field. This method has been tested using 60Co gamma rays. The results were within 1% deviation between the theory and the experiment for the Sp facter. The new method does not need air measurement, and we could determine the Sp p factors with a small piece of block.
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