Applications of Dual Energy CT in Patients With Osseous Metastases From Castrate-resistant Prostate Cancer

"The subject's diagnostic scan will be preceded by a not clinically indicated non enhanced dual energy scan. The overall radiation dose to the patient for the first and second acquisition will be twice the radiation dose of a conventional CT of the chest, abdomen and pelvis. The non enhanced dual energy scan will be repeated during a clinical follow-up after the subject's first three months of enrollment and at a clinical follow-up after six months of enrollment.~The clinically-indicated, contrast-enhanced diagnostic scan will be performed according to standard of care."