The Utility of Prostate MRI Using Diffusion and Dynamic Enhanced Imaging in the Evaluation of Patients Previously Biopsy Negative for Cancer

Andrew Dean Hardie¹

Patients with an initial set of prostate biopsies which were negative for cancer were assessed by phased array MRI. All patients subsequently had repeat prostate biopsy which was used as the gold standard. The diagnostic accuracy of MRI, negative predictive value, and the difference in the number of biopsy samples performed in patients with cancer suspected by MRI and those unlikely to have cancer by MRI were assessed. MRI was 100% sensitive, 91% specific, and had a 100% negative predictive value for cancer. Less biopsy passes were performed in patients with an MRI read as likely to have cancer than those unlikely to have cancer by MRI.