Role of 3T multiparametric magnetic resonance imaging without endorectal coil in the detection of local recurrent prostate cancer after radical prostatectomy: the radiation oncology point of view

AbstractObjective. The aims of this study were to evaluate the role of 3 tesla multiparametric magnetic resonance imaging (3TmMRI) without endorectal coil in the detection of radiographic local recurrences (rLRs) in a contemporary cohort of patients with prostate cancer who presented with biochemical recurrence after radical prostatectomy (RP) with low prostate-specific antigen (PSA) levels, and to identify clinical parameters associated with the 3TmMRI findings. Materials and methods. Between 2009 and 2013, 57 patients with biochemical recurrence of prostate cancer after RP who were considered for salvage radiation therapy (SRT) were included. 3TmMRI with T2-weighted imaging, diffusion weighted imaging (DWI) and dynamic contrast-enhanced imaging without endorectal coil was carried out in all patients before treatment. Results. In 14 out of 57 patients (24.56%) local recurrence was detected through 3TmMRI. Median pre-SRT PSA was 0.40 ng/ml (interquartile range 0.30–2.05 ng/ml). The recurrence was perianas...