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Where should we measure the entrance air kerma rate during acceptance testing of the automatic dose control of a fluoroscopic system?
MedLine Citation:
PMID:  23413079     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In Japan, the entrance air kerma rate (EAKR) to a patient cannot exceed 50 mGy/min in conventional fluoroscopy. However, it is unclear where the EAKR should be measured. We obtained the tube potential and tube current as a function of polymethylmethacrylate (PMMA) thickness, and the EAKR at the interventional reference point (IRP) was measured from the trajectory. The EAKR at the point established by the U.S. Food and Drug Administration (FDA) was calculated from EAKR at the IRP. The EAKR at the IRP exceeded the limit at a PMMA thickness of 22-28 cm. However, the EAKR did not exceed the limit at the FDA point. If the EAKR to a patient is being verified to meet the recent Japanese ruling, the EAKR should be measured at the FDA point, and if the EAKR is being evaluated for determination of the skin dose, it should be monitored at the IRP.
Authors:
Atsushi Fukuda; Tosiaki Miyati; Kosuke Matsubara
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-15
Journal Detail:
Title:  Radiological physics and technology     Volume:  -     ISSN:  1865-0341     ISO Abbreviation:  Radiol Phys Technol     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101467995     Medline TA:  Radiol Phys Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Radiology, Shiga Medical Center for Children, 5-7-30, Moriyama, Moriyama city, Shiga, 524-0022, Japan, ntoki@blue.plala.or.jp.
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