Document Detail

Survey of aorta and coronary arteries with prospective ECG-triggered 100-kV 64-MDCT angiography.
MedLine Citation:
PMID:  19542418     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The purpose of this study was to investigate the feasibility of prospective ECG-triggered axial 64-MDCT angiography of the aorta and coronary arteries performed at a tube voltage of 100 kV. SUBJECTS AND METHODS: Thirty patients with a heart rate less than 75 beats/min who were referred for aortic CT angiography were enrolled. The image quality of the ascending aorta, aortic valve, and coronary arteries was evaluated for motion artifacts. Contrast enhancement (mean attenuation) was measured in the ascending aorta, descending aorta, and bifurcation of the aorta. Aortic valve and coronary artery lesions were surveyed. RESULTS: Acceptable image quality was achieved in 100% (30/30) of cases for the ascending aorta, 97% (29/30) of cases for the aortic valve, and 98% (442/452) of coronary arterial segments. Contrast enhancement was greater than 200 HU and was satisfactory (ascending aorta, 379 +/- 80 HU; descending aorta, 354 +/- 72 HU; bifurcation, 355 +/- 96 HU). Lesions found in the aortic valve were plaque (n = 16) and bicuspid valve (n = 1) and in the coronary arteries were > or = 50% luminal stenosis (n = 5), plaque (n = 21), myocardial bridge (n = 12), and anomalous origin (n = 1). The effective radiation dose was estimated to be 7.5 +/- 1.7 mSv. CONCLUSION: For patients with a heart rate less than 75 beats/min, prospective ECG-triggered axial CT angiography at a tube voltage of 100 kV has the potential to provide clinically relevant information about the aorta and coronary arteries with low radiation exposure.
Chikako Fujioka; Jun Horiguchi; Masao Kiguchi; Hideya Yamamoto; Toshiro Kitagawa; Katsuhide Ito
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  AJR. American journal of roentgenology     Volume:  193     ISSN:  1546-3141     ISO Abbreviation:  AJR Am J Roentgenol     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-06-22     Completed Date:  2009-07-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7708173     Medline TA:  AJR Am J Roentgenol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  227-33     Citation Subset:  AIM; IM    
Department of Clinical Radiology, Hiroshima University Hospital, 1-2-3, Kasumi-cho, Minami-ku, Hiroshima, 734-8551, Japan.
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MeSH Terms
Aged, 80 and over
Aortic Valve Stenosis / radiography*
Aortography / methods*
Cardiac-Gated Imaging Techniques / methods*
Coronary Angiography / methods*
Coronary Stenosis / radiography*
Feasibility Studies
Middle Aged
Prospective Studies
Reproducibility of Results
Sensitivity and Specificity
Tomography, X-Ray Computed / methods*

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