Importance of the heart rate in ultra-high-resolution coronary CT angiography with 0.35 s gantry rotation time
Purpose We investigated the effects of the heart rate (HR) on the motion artifact in coronary computed tomography angiography (CCTA) with ultra-high-resolution-CT (U-HRCT), and we clarified the upper limit of optimal HR in CCTA with U-HRCT in a comparison with conventional-resolution-CT (CRCT) on a...
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Published in | Japanese journal of radiology Vol. 40; no. 8; pp. 781 - 790 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Singapore
Springer Nature Singapore
01.08.2022
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Purpose
We investigated the effects of the heart rate (HR) on the motion artifact in coronary computed tomography angiography (CCTA) with ultra-high-resolution-CT (U-HRCT), and we clarified the upper limit of optimal HR in CCTA with U-HRCT in a comparison with conventional-resolution-CT (CRCT) on a cardiac phantom and in patients with CCTA.
Materials and methods
A pulsating cardiac phantom equipped with coronary models was scanned at static and HR simulations of 40–90 beats/min (bpm) at 10-bpm intervals using U-HRCT and CRCT, respectively. The sharpness and lumen diameter of the coronary model were quantitatively compared between U-HRCT and CRCT stratified by HR in the phantom study. We also assessed the visual inspections of clinical images in CCTA with U-HRCT.
Results
At the HRs ≤ 60 bpm, the error of the lumen diameter of the U-HRCT tended to be smaller than that of the CRCT. However, at the HRs > 60 bpm, the inverse was shown. For the image sharpness, the U-HRCT was significantly superior to the CRCT (
p
< 0.05). In the visual assessment, the scores were negatively correlated with HRs in patients (Spearman
r
= − 0.71,
p
< 0.01). A receiver-operating characteristic analysis revealed the HR of 61 bpm as the optimal cutoff of the non-diagnostic image quality, with an area under the curve of 0.87, 95% sensitivity, and 71% specificity.
Conclusion
At HRs ≤ 60 bpm, U-HRCT was more accurate in the imaging of coronary arteries than CRCT. The upper limit of the optimal HR in CCTA with U-HRCT was approx. 60 bpm. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1867-1071 1867-108X |
DOI: | 10.1007/s11604-022-01265-2 |