Estimation of the Exposure and a Risk-Benefit Analysis for a CT System Designed for a Lung Cancer Mass Screening Unit

Organ or tissue doses from examination by a computed tomography system called LSCT were determined by in-phantom measurement. LSCT has been developed for lung cancer screening, with spiral scanning capability. Dose measurements were performed under the actual screening conditions of the chest CT exa...

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Bibliographic Details
Published in:Radiation protection dosimetry 1996-01, Vol.67 (2), p.101-108
Main Authors: Nishizawa, K., Iwai, K., Matsumoto, T., Sakashita, K., Iinuma, T.A., Tateno, Y., Miyamoto, T., Shimura, A., Takagi, H.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Medical sciences
Radiation therapy and radiosensitizing agent
Treatment with physical agents
Treatment. General aspects
Tumors
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Summary:Organ or tissue doses from examination by a computed tomography system called LSCT were determined by in-phantom measurement. LSCT has been developed for lung cancer screening, with spiral scanning capability. Dose measurements were performed under the actual screening conditions of the chest CT examination. The effective dose recommended by ICRP 60 was evaluated using the organ of tissue doses. Risk-benefit analysis in the LSCT screening was also performed. The resultant effective dose per LSCT examination was 3.6 mSv and surface dose was 7.6 mGy. It was half to a third lower than the doses by traditional CT systems. The risk-benefit analysis of LSCT showed that the benefit will exceed the risk for Japanese over forty years for men and over forty-five for women.
ISSN:0144-8420
1742-3406
DOI:10.1093/oxfordjournals.rpd.a031801