Abstract
Objective
The purpose of this study was to determine the clinical implication of the myocardial FDG uptake patterns by comparing with the results of stress myocardial perfusion imaging (MPI) as the reference standard.
Methods
By reviewing the medical records, 86 pairs of stress MPI and FDG PET/CT of 84 patients who underwent stress MPI and oncologic FDG PET/CT in 1 month were included in this study. The patterns of the myocardial FDG uptake were classified into five patterns such as ‘low’, ‘diffuse’, ‘basal ring’, ‘focal high’, and ‘focal defect on diffuse high’. MPI was evaluated using a 5-point scoring model ranging from 0 (normal uptake) to 4 (uptake absent) based on the 17-segment model. The summed stress score of 4 or higher was defined as ‘abnormal MPI’. Factors predictive of abnormal MPI were analyzed using a log-rank multivariate test and p < 0.05 was set as significant.
Results
Abnormal MPI was observed in only 16 of 36 (44%) patients with ‘low’ pattern, 10 of 23 (43%) patients with ‘diffuse high’ pattern, and 1 of 9 (11%) patients with ‘basal ring’ pattern, but in 8 of 9 (89%) patients with ‘focal high’ pattern, and 8 of 9 (89%) patients with ‘focal defect on diffuse high’ pattern. The log-rank multivariate test revealed that ‘focal high’ and ‘focal defect on diffuse high’ pattern were correlated with an abnormal MPI.
Conclusions
These results indicate that further cardiac work-up might be helpful in the patients with ‘focal high’ pattern or ‘focal defect on diffuse high’ pattern of myocardial FDG at oncologic PET. A prospective study should be needed to further support this conclusion.
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Takanami, K., Saito, M., Matsumoto, Y. et al. Clinical implication of myocardial FDG uptake pattern in oncologic PET: retrospective comparison study with stress myocardial perfusion imaging as the reference standard. Ann Nucl Med 34, 233–243 (2020). https://doi.org/10.1007/s12149-020-01437-y
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DOI: https://doi.org/10.1007/s12149-020-01437-y