18 F-sodium fluoride positron emission tomography for molecular imaging of coronary atherosclerosis based on computed tomography analysis

Atherosclerosis
Toshiro KitagawaYasuki Kihara

Abstract

We aimed at evaluating the relation of 18F-sodium fluoride (18F-NaF) uptake on positron emission tomography (PET) to coronary atherosclerosis detected and assessed by computed tomography (CT). Thirty-two patients with one or more coronary atherosclerotic lesions detected on cardiac CT underwent 18F-NaF PET/CT. Each coronary atherosclerotic lesion was evaluated on CT angiography for plaque types (calcified plaque [CP], non-calcified plaque [NCP], partially calcified plaque [PCP]), and the presence of CT-based high-risk features (minimum CT density <30 Hounsfield units and vascular remodeling index >1.1). Focal 18F-NaF uptake of each lesion was quantified using maximum tissue-to-background ratio (TBRmax). A total of 111 lesions were studied. In a patient-based analysis, logarithmically transformed coronary calcium score correlated positively with maximum TBRmax per patient, and 15 patients with myocardial infarction or unstable angina history showed a higher maximum TBRmax per patient than those without (1.36 ± 0.15 versus 1.15 ± 0.15, p = 0.0006). In a lesion-based analysis, PCP showed a higher TBRmax than CP and NCP (1.17 ± 0.19 versus 1.00 ± 0.24 and 0.92 ± 0.18, respectively, p < 0.0001), and the lesions with high-risk featur...Continue Reading

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