New Method of Measuring Coronary Diameter by Electron-Beam Computed Tomographic Angiography Using Adjusted Thresholds Determined by Calibration With Aortic Opacity

Background In a previous study the adjusted thresholds at which the diameters of coronary arteries determined by enhanced electron-beam computed tomography (CT) scans are equal to the corresponding quantitative coronary angiography measurements were analyzed, and their correlation with maximum CT va...

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Bibliographic Details
Published in:Circulation Journal 2004, Vol.68(8), pp.769-777
Main Authors: Funabashi, Nobusada, Kobayashi, Yoshiki, Kudo, Masayuki, Asano, Miki, Teramoto, Kiyomi, Komuro, Issei, Rubin, Geoffrey D
Format: Article
Language:English
Subjects:
Adjusted thresholds
Aorta, Thoracic - diagnostic imaging
Calibration
Coronary Angiography - methods
Coronary artery
Coronary Vessels - anatomy & histology
Electron beam computed tomography
Follow-Up Studies
Heart Transplantation
Humans
Male
Middle Aged
Quantitative coronary angiography
Regression Analysis
Reproducibility of Results
Sensitivity and Specificity
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Summary:Background In a previous study the adjusted thresholds at which the diameters of coronary arteries determined by enhanced electron-beam computed tomography (CT) scans are equal to the corresponding quantitative coronary angiography measurements were analyzed, and their correlation with maximum CT values for the vessel short axes was determined. A rapid accurate method for such measurements was sought by substituting maximum CT values for the descending aorta in the corresponding axial images for those for the short axes. Methods and Results In 8 patients, 179 sites were measured. Means (± SD) of adjusted thresholds and the maximum CT values for vessel short axes and the descending aorta in the corresponding axial images for all vessels were 108 ±66, 227±80, and 363±75 Hounsfield Unit (HU), respectively. Adjusted thresholds correlated with the maximum CT values for the corresponding vessel short axes and the descending aorta in the corresponding axial images, with R2=0.55, 0.33, p
ISSN:1346-9843
1347-4820
DOI:10.1253/circj.68.769