Automatic determination of differential coronary artery motion minima for cardiac computed tomography optimal phase selection

Academic Radiology
Jonathan LessickMartin H K Hoffmann

Abstract

Selecting the optimal phase for coronary artery evaluation can be challenging, especially at higher heart rates, given that the optimal phase may differ for each of the coronary arteries. This study aimed to evaluate a novel vessel-specific algorithm which automatically outputs the minimum motion phase per coronary artery. The study included 44 patients who underwent 256-slice cardiac computed tomography for evaluation of chest pain. End-systolic and mid-diastolic minimal motion phases were automatically calculated by a previously validated global motion algorithm and by a new vessel-specific algorithm which calculates the minimum motion for each of the three main coronary arteries, separately. Two readers blindly evaluated all coronary segments for image quality. Median scores per coronary artery were compared by the Wilcoxon signed rank test. The variation, per patient, between the optimal phases of the three coronary arteries was 5.0 ± 4.5% (1%-22%) for end systole and 4.8 ± 4.1% (0%-19%) for mid diastole. The mean image quality scores per coronary artery were 4.0 ± 0.61 for the vessel-specific approach and 3.80 ± 0.69 for the global phase selection (P < .001). Overall, 46 of 122 arteries had a better score with the vessel-s...Continue Reading

References

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Mar 12, 2009·European Radiology·Balazs RuzsicsU Joseph Schoepf
Jul 9, 2011·Medical Image Analysis·Olivier EcabertJürgen Weese

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Citations

Oct 11, 2016·Computational and Mathematical Methods in Medicine·Lubomir HadjiiskiElla Kazerooni

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