The impact of motion artifacts on the reproducibility of repeated coronary artery calcium measurements

Horiguchi Jun

Fukuda Hiroshi

Yamamoto Hideya

Hirai Nobuhiko

Alam Farzana

Kakizawa Hideaki

Hieda Masashi

Tachikake Toshihiro

Marukawa Kazushi

Ito Katsuhide

European Radiology

The purpose of this study is, using a 16-section multidetector-row helical computed tomography (MDCT) scanner with retrospective reconstruction, to compare variability in repeated coronary calcium scoring and qualitative scores of the motion artifacts. One hundred forty-four patients underwent two subsequent scans using MDCT. According to Agatston and volume algorithms, the coronary calcium scores during mid-diastole (the center corresponding to 700f the R-R cycle) were calculated and the inter-scan variability was obtained. Motion artifacts from coronary artery calcium were subjectively evaluated and classified using a 5-point scale: 1, excellent; no motion artifacts; 2, fine, minor motion artifacts; 3, moderate, mild motion artifacts; 4, bad, severe motion artifacts; 5, poor, doubling or discontinuity. Each reading was done by vessels (left main, left descending, left circumflex and right coronary arteries) and the motion artifact score (mean of the scales) was determined per patient. The variability in the low (1.2±0.2) and high (2.4±0.6) motion artifact score groups was 7±6 (median, 6)-0x1.4aa00bfffbf7p-149nd 19±15 (16)26651131640n the Agatston score (P<0.01) and 7±7 (6)-0x1.f9a280852f11p+0nd 16±13 (14)26646061170n the volume score (P<0.01), respectively. In conclusion, motion has a significant impact on the reproducibility of coronary calcium scoring.

Cardiac

Coronary artery

Calcification

CT

医学 [ 490 ]

英語

Springer

Copyright (c) 2007 Springer "The original publication is available at www.springerlin.com"

[ISSN] 0938-7994

[DOI] 10.1007/s00330-006-0278-2

[PMID] 16718452

[NCID] AA10824302

[DOI] http://dx.doi.org/10.1007/s00330-006-0278-2