Coronary Artery Disease Clinical Trial
The objective of this study is to evaluate the precision of semi-automated lumen boundary identification from coronary computed tomography angiography (cCTA) by current version of HeartFlow software and the impact on fractional flow reserve (FFRCT) by using optical coherence tomography (OCT) as reference standard.
Analysis of cCTA and OCT was conducted under blind in independent organizations.
After unblinding the cCTA and OCT case identification number, the OCT image was
co-registered to cCTA data.
After co-registration of cCTA and OCT lesion locations, the minimal lumen area (MLA) was
detected with both modalities. FFROCT was calculated using OCT-updated models in which
cCTA-based lumen geometry was replaced by OCT-based lumen geometry.
Lesions were grouped according to their severity of calcification (using Agatston score) and
minimum lumen diameter.
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Observational Model: Cohort, Time Perspective: Retrospective
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