Extracardiac findings with increased perfusion during clinical O-15-H 2 O PET/CT myocardial perfusion imaging: A case series
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING(2023)
摘要
Background Coincidental extracardiac findings with increased perfusion were reported during myocardial perfusion imaging (MPI) with various retention radiotracers. Clinical parametric O-15-H 2 O PET MPI yielding quantitative measures of myocardial blood flow (MBF) was recently implemented at our facility. We aim to explore whether similar extracardiac findings are observed using O-15-H 2 O. Methods and results All patients (2963) were scanned with O-15-H 2 O PET MPI according to international guidelines and extracardiac findings were collected. In contrast to parametric O-15-H 2 O MBF images, extracardiac perfusion was assessed using summed images. Biopsy histopathology and other imaging modalities served as reference standards. Various malignant lesions with increased perfusion were detected, including lymphomas, large-celled neuroendocrine tumour, breast, and lung cancer plus metastases from colonic and renal cell carcinomas. Furthermore, inflammatory and hyperplastic benign conditions with increased perfusion were observed: rib fractures, gynecomastia, atelectasis, sarcoidosis, pneumonia, chronic lung inflammation and fibrosis, benign lung nodule, chronic diffuse lung infiltrates, pleural plaques and COVID-19 infiltrates. Conclusions Malignant and benign extracardiac coincidental findings with increased perfusion are readily visible and frequently seen on O-15-H 2 O PET MPI. We recommend evaluating the summed O-15-H 2 O PET images in addition to the low-dose CT attenuation images.
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关键词
O-15-H2O PET,extra cardiac,coincidental findings,myocardial perfusion,positron emission tomography,cardiac PET,splenic switch off
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