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Simultaneous whole-body 18F–PSMA-1007-PET/MRI with integrated high-resolution multiparametric imaging of the prostatic fossa for comprehensive oncological staging of patients with prostate cancer: a pilot study

European Journal of Nuclear Medicine and Molecular Imaging Aims and scope Submit manuscript

Abstract

Introduction

The aim of the present study was to explore the clinical feasibility and reproducibility of a comprehensive whole-body 18F–PSMA-1007-PET/MRI protocol for imaging prostate cancer (PC) patients.

Methods

Eight patients with high-risk biopsy-proven PC underwent a whole-body PET/MRI (3 h p.i.) including a multi-parametric prostate MRI after 18F–PSMA-1007-PET/CT (1 h p.i.) which served as reference. Seven patients presented with non-treated PC, whereas one patient presented with biochemical recurrence. SUVmean-quantification was performed using a 3D–isocontour volume-of-interest. Imaging data was consulted for TNM-staging and compared with histopathology. PC was confirmed in 4/7 patients additionally by histopathology after surgery. PET-artifacts, co-registration of pelvic PET/MRI and MRI-data were assessed (PI-RADS 2.0).

Results

The examinations were well accepted by patients and comprised 1 h. SUVmean-values between PET/CT (1 h p.i.) and PET/MRI (3 h p.i.) were significantly correlated (p < 0.0001, respectively) and similar to literature of 18F–PSMA-1007-PET/CT 1 h vs 3 h p.i. The dominant intraprostatic lesion could be detected in all seven patients in both PET and MRI. T2c, T3a, T3b and T4 features were detected complimentarily by PET and MRI in five patients. PET/MRI demonstrated moderate photopenic PET-artifacts surrounding liver and kidneys representing high-contrast areas, no PET-artifacts were observed for PET/CT. Simultaneous PET-readout during prostate MRI achieved optimal co-registration results.

Conclusions

The presented 18F–PSMA-1007-PET/MRI protocol combines efficient whole-body assessment with high-resolution co-registered PET/MRI of the prostatic fossa for comprehensive oncological staging of patients with PC.

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Acknowledgements

We appreciate the support of Dr. Stefan Kegel and of our technicians Verena Schneider and Rene Hertel.

Funding

There was no funding for this study.

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Correspondence to Martin T. Freitag.

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Conflicts of interest

Jens Cardinale, Prof. Dr. Frederik Giesel, Prof. Dr. Uwe Haberkorn and Prof. Dr. Klaus Kopka have applied for a patent of PSMA-1007. The other authors report no conflict of interest.

Informed consent

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.

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Freitag, M.T., Kesch, C., Cardinale, J. et al. Simultaneous whole-body 18F–PSMA-1007-PET/MRI with integrated high-resolution multiparametric imaging of the prostatic fossa for comprehensive oncological staging of patients with prostate cancer: a pilot study. Eur J Nucl Med Mol Imaging 45, 340–347 (2018). https://doi.org/10.1007/s00259-017-3854-6

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  • DOI: https://doi.org/10.1007/s00259-017-3854-6

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