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- Title
Observer repeatability and interscan reproducibility of 18F-sodium fluoride coronary microcalcification activity.
- Authors
Tzolos, Evangelos; Kwiecinski, Jacek; Lassen, Martin Lyngby; Cadet, Sebastien; Adamson, Philip D.; Moss, Alastair J.; Joshi, Nikhil; Williams, Michelle C.; van Beek, Edwin J. R.; Dey, Damini; Berman, Daniel S.; Dweck, Marc R.; Newby, David E.; Slomka, Piotr J.
- Abstract
Background: We aimed to establish the observer repeatability and interscan reproducibility of coronary 18F-sodium-fluoride positron emission tomography (PET) uptake using a novel semi-automated approach, coronary microcalcification activity (CMA). Methods: Patients with multivessel coronary artery disease underwent repeated hybrid PET and computed tomography angiography (CTA) imaging (PET/CTA). CMA was defined as the integrated standardized uptake values (SUV) in the entire coronary tree exceeding 2 standard deviations above the background SUV. Coefficients of repeatability between the same observer (intraobserver repeatability), between 2 observers (interobserver repeatability) and coefficient of reproducibility between 2 scans (interscan reproducibility), were determined at vessel and patient level. Results: In 19 patients, CMA was assessed twice in 43 coronary vessels on two PET/CT scans performed 12 ± 5 days apart. There was excellent intraclass correlation for intraobserver and interobserver repeatability as well as interscan reproducibility (all ≥ 0.991). There was 100% intraobserver, interobserver and interscan agreement for the presence (CMA > 0) or absence (CMA = 0) of coronary18F-NaF uptake. Mean CMA was 3.12 ± 0.62 with coefficients of repeatability of ≤ 10% for all measures: intraobserver 0.24 and 0.22, interobserver 0.30 and 0.29 and interscan 0.33 and 0.32 at a per-vessel and per-patient level, respectively. Conclusions: CMA is a repeatable and reproducible global measure of coronary atherosclerotic activity.
- Subjects
POSITRON emission tomography; STATISTICAL reliability; CORONARY arteries; CORONARY artery disease; INTRACLASS correlation
- Publication
Journal of Nuclear Cardiology, 2022, Vol 29, Issue 1, p126
- ISSN
1071-3581
- Publication type
Article
- DOI
10.1007/s12350-020-02221-1