Purpose: PET with radiolabeled somatostatin receptors (SSTR) analogues, such as 68Ga-DOTATOC, is commonly used in all stages of gastroenteropancreatic neuroendocrine tumours (GEP-NETs). Magnetic resonance Imaging (MRI) has excellent soft-tissue contrast and it is mainly applied in this oncological setting for assessing liver disease. Simultaneous PET/MRI scanners allow the combined acquisition of PET and MRI data with improved patient comfort and reduced radiation dose. The aim of the present pictorial essay is to highlight the assets and limits of fully hybrid PET/MRI in the field of GEP-NETs, presenting significant clinical cases performed in our Centre. Technique and findings: PET/MRI protocol: simultaneous PET/MRI acquisition started approximately 60 min after 68Ga-DOTATOC tracer injection; MR localizer was performed to define the number of table positions (PET-FOV) for PET/MRI whole-body acquisition. A dedicated MRI protocol was performed on the abdomen, following the whole-body PET/MRI scan. Conclusion: 68Ga-DOTATOC PET/MRI combines the high sensitivity and specificity of 68Ga-DOTATOC PET tracer and MR high-quality imaging, especially for the liver. The clinical setting of GEP-NETs represents an interesting setting of application of this imaging technique, although the pros and cons should be taken into account until further methodological improvements will occur, especially for the characterization of lung findings.
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