| The comparison of radiation dose between C-arm flat-detector CT (DynaCT) and multi-slice CT (MSCT): A phantom study. | |
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MedLine Citation:
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PMID: 21963617 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: To assess and compare the radiation dose of DynaCT in phantoms to that of MSCT. METHODS AND MATERIALS: A male Anderson Radiation Therapy 200 phantom with embedded thermoluminescence dosimeters (TLDs) was scanned with DynaCT (Axiom Artis dTA, Siemens Healthcare, Forchheim, Germany) and MSCTs (MSCT1: Lightspeed VCT, GE, Milwaukee, USA; MSCT2: Sensation Cardiac 64, Siemens Healthcare, Erlangen, Germany), respectively. For DynaCT, radiation exposure data with automatic exposure control were obtained from scanning of head, chest and abdomen. For MSCT, scanning protocols for head, chest, and abdomen were examined under conventional exposure conditions. Effective doses were calculated from LiF-TLD measurements according to ICRP103. A Catphan phantom (Phantom Lab, USA) was used to evaluate the spatial resolution and low contrast detectability of DynaCT and MSCT. RESULTS: The effective doses for DynaCT from head, chest and abdomen scanning were 1.18, 7.32, 7.48mSv (20s scan) and 0.85, 6.01, 7.04mSv (8s scan); the effective doses for MSCT from head, chest and abdomen scanning were 3.33, 7.62 and 8.42mSv (MSCT1), and 1.89, 7.52, 8.23mSv (MSCT2). Significant difference between the organ doses from DynaCT and from MSCT (p<.05) was shown. The spatial resolution of 12lp/cm was achieved and it was able to recognize a 3mm low contrast object at 0.5% contrast level in DynaCT, which was on the same level as in the MSCT images. CONCLUSION: The phantom study indicates that DynaCT applies significantly less dose to patient and achieves similar spatial resolution and low contrast detectability to standard diagnostic MSCT. |
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Authors:
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Mei Bai; Bin Liu; Hongqiu Mu; Xianghua Liu; Yuan Jiang |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-30 |
Journal Detail:
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Title: European journal of radiology Volume: - ISSN: 1872-7727 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-10-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8106411 Medline TA: Eur J Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Biomedical Engineering, Xuanwu Hospital of Capital Medical University, No. 45 Changchun Street, Beijing 100053, PR China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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