The Princess Margaret - Prostate Ultrasound and Biopsy Centre
Magnetic resonance imaging (MRI) is an excellent method of identifying prostate cancer within the prostate. This strategy has a high probability of finding prostate cancer in men who have suspicious clinical findings, because rather than sampling the prostate indiscriminately, the suspicious lesions are targeted. The soft tissue of the prostate is best visualized with MRI compared to other medical imaging systems such as CT or X-Ray.
Most commonly an MRI is taken prior to the biopsy to identify the target sites and the image is “fused” with ultrasound. The biopsy is then taken under ultrasound visualization. A different method of MRI guided biopsy uses MRI both for targeting and at the time of biopsy, without the use of ultrasound. With this method, the biopsy sample is often obtained from across the perineum rather than through the rectum. MRI-guided biopsy has been shown to improve the detection of prostate cancer compared to the standard TRUS-biopsy.