Abstract:
OBJECTIVES:The aim of this study was to quantify and compare effective doses from conventional angiography and multislice computed tomography (MSCT) coronary angiography using a 16-slice scanner. BACKGROUND:Multislice computed tomography is now a viable modality for cardiac imaging. However, for any diagnostic use of ionizing radiation, the risk to the patient must be considered and justified. METHODS:Multislice computed tomography angiography and conventional angiography were used to assess 180 patients with suspected coronary artery disease. Estimates of effective dose were derived from exposure data recorded for each patient examination. For each modality, a comparable calculation technique was used, based on Monte Carlo modeling of the standard Cristy phantom. RESULTS:In a subset of 91 directly comparable patients the mean effective dose for MSCT coronary angiography was 14.7 mSv (SD 2.2) and that for conventional angiography was 5.6 mSv (SD 3.6). A significant difference in effective dose was seen between the two protocols. CONCLUSIONS:The mean effective dose for MSCT coronary angiography was significantly higher than that for conventional angiography. As MSCT cardiac scanners become increasingly available, operators must be aware of the radiation dose and the factors that affect it.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Coles DR,Smail MA,Negus IS,Wilde P,Oberhoff M,Karsch KR,Baumbach Adoi
10.1016/j.jacc.2005.11.078subject
Has Abstractpub_date
2006-05-02 00:00:00pages
1840-5issue
9eissn
0735-1097issn
1558-3597pii
S0735-1097(06)00353-6journal_volume
47pub_type
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