Document Detail

Radiation dose exposure in multislice computed tomography of the coronaries in comparison with conventional coronary angiography.
MedLine Citation:
PMID:  17408786     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Radiation dose exposure is increased in multislice spiral computed tomography (MSCT) compared to conventional coronary angiography (CXA). METHODS: Retrospective data analysis of 56 patients (66+/-8 years, 49 males, body surface area 1.98+/-0.18 m(2), heart rate 64+/-11 bpm) who underwent MSCT and CXA was performed (MSCT: 16-slice scanner, rotation time 0.375 s, 120 kV, ECG-pulsing; CXA: current technique system build in 2003). Ten patients with bypass grafts underwent bypass angiography in CXA and MSCT. To compare the radiation doses of both investigations, the effective dose (ED) was chosen as the analysis variable. RESULTS: The mean ED for MSCT was 9.76+/-1.84 mSv (n=46) for patients without bypass grafts; with calcium scoring the mean ED was 12.46+/-2.23 mSv (n=46). In comparison, the mean ED of CXA was 2.60+/-1.27 mSv (n=46) for patients without bypass grafts; with bypass grafts (n=10) the mean ED for MSCT was 12.95+/-1.75 mSv, for CXA of 6.27+/-4.04 mSv, respectively. In MSCT heart rates of <or=60 bpm resulted in lower mean ED than heart rates of >60 bpm (8.86+/-1.24 mSv versus 10.53+/-1.86 mSv). CONCLUSIONS: MSCT is still associated with a higher radiation dose exposure than CXA. The radiation dose relation is more favorable for MSCT than for CXA in patients with bypass grafts in comparison to patients without bypass grafts. This study emphasizes the importance of dose reduction techniques.
Thorsten Dill; Anja Deetjen; Okan Ekinci; Susanne Möllmann; Guido Conradi; Alexander Kluge; Christoph Weber; Michael Weber; Holger Nef; Christian W Hamm
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-04-03
Journal Detail:
Title:  International journal of cardiology     Volume:  124     ISSN:  1874-1754     ISO Abbreviation:  Int. J. Cardiol.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-03-05     Completed Date:  2008-03-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8200291     Medline TA:  Int J Cardiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  307-11     Citation Subset:  IM    
Department of Cardiology, Kerckhoff Heart Center, Bad Nauheim, Germany.
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MeSH Terms
Body Surface Area
Coronary Angiography / methods*
Coronary Disease / radiography*
Dose-Response Relationship, Radiation
Follow-Up Studies
Heart Rate / radiation effects
Radiation Dosage*
Retrospective Studies
Tomography, Spiral Computed / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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