Oncological Prognosis of Prostate Lesions by Chemical Exchange Saturation Transfer Magnetic Resonance Imaging (CEST-MRI)

"The MRI will be performed at the Clermont Ferrand University Hospital on the 3T research MRI on a Siemens MRI system (MAGNETOM VIDA, Siemens Healthcare, Erlangen, Germany), the emission of the radiofrequency pulses and the reception of the signal will be done using a coil dedicated to the abdo-pelvic region. The images will be analyzed by the radiologist.~MRI is non-irradiating medical imaging. It is practiced according to good practices and the recommendations of the French Society of Radiology.~* Acquisition of morphological T1, T2 sequences for the identification of areas of interest on the pelvic area.~* Acquisition of the CEST MRI sequence (acquisition time 5 min)~* Acquisition of functional sequences, DWI diffusion-weighted images and dynamic DCE sequence after injection of a single dose of non-linear gadolinum.~The imaging report will reveal the presence or absence of tumor lesions in the prostate and their location. Data will then be compared to the histopathological analysis."