Maria João Vidigal Ferreira1,2,3, Manuel Oliveira-Santos4, Rodolfo Silva5, Andreia Gomes5, Nuno Ferreira5, Antero Abrunhosa5, João Lima5,6, Mariano Pego4, Lino Gonçalves6, Miguel Castelo-Branco5,6. 1. ICNAS (Instituto de Ciências Nucleares Aplicadas à Saúde), Coimbra, Portugal. mjvidigal@netc.pt. 2. Faculdade de Medicina da Universidade de Coimbra, Coimbra, Portugal. mjvidigal@netc.pt. 3. Centro Hospitalar e Universitário de Coimbra (Serviço de Cardiologia - pólo HUC), Coimbra, Portugal. mjvidigal@netc.pt. 4. Centro Hospitalar e Universitário de Coimbra (Serviço de Cardiologia - pólo HUC), Coimbra, Portugal. 5. ICNAS (Instituto de Ciências Nucleares Aplicadas à Saúde), Coimbra, Portugal. 6. Faculdade de Medicina da Universidade de Coimbra, Coimbra, Portugal.
Abstract
BACKGROUND: The aim of the present study was to evaluate the uptake of F18-NaF by the arterial wall in patients with high cardiovascular (CV) risk profile. The tracer uptake was assessed in relation to gender and the number of CV risk factors. METHODS AND RESULTS: 25 patients without known CV disease were included and evaluated by PET-CT with F18-NaF: 14 (56%) men and 11 (44%) women. The mean target-to-background ratio (TBR: max SUV/mean blood-pool SUV) but not the corrected uptake per lesion (CUL: max SUV - mean blood-pool SUV) was higher in men than women (TBR: 1.8 ± 0.6 vs 1.7 ± 0.2; P = 0.04; CUL: 0.7 ± 0.3 vs W 0.6 ± 0.1; P = 0.4). Patients with >3 CV risk factors had higher CUL (0.8 ± 0.1 vs 0.6 ± 0.2; P = 0.01) but not TBR (1.8 ± 0.2 vs 1.7 ± 0.6; P = 0.7) than patients with <3 risk factors. CONCLUSIONS: The TBR but not CUL is higher in men than women while the CUL but not TBR is related to the number of CV risk factors. These results are hypothesis-generating and require validation in larger studies.
BACKGROUND: The aim of the present study was to evaluate the uptake of F18-NaF by the arterial wall in patients with high cardiovascular (CV) risk profile. The tracer uptake was assessed in relation to gender and the number of CV risk factors. METHODS AND RESULTS: 25 patients without known CV disease were included and evaluated by PET-CT with F18-NaF: 14 (56%) men and 11 (44%) women. The mean target-to-background ratio (TBR: max SUV/mean blood-pool SUV) but not the corrected uptake per lesion (CUL: max SUV - mean blood-pool SUV) was higher in men than women (TBR: 1.8 ± 0.6 vs 1.7 ± 0.2; P = 0.04; CUL: 0.7 ± 0.3 vs W 0.6 ± 0.1; P = 0.4). Patients with >3 CV risk factors had higher CUL (0.8 ± 0.1 vs 0.6 ± 0.2; P = 0.01) but not TBR (1.8 ± 0.2 vs 1.7 ± 0.6; P = 0.7) than patients with <3 risk factors. CONCLUSIONS: The TBR but not CUL is higher in men than women while the CUL but not TBR is related to the number of CV risk factors. These results are hypothesis-generating and require validation in larger studies.
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