Focal therapy HIFU is appropriate for patients whose prostate cancer is diagnosed at a higher grade and stage, but is still confined to the prostate. We use guided imagery to locate and destroy only the diseased portion of the prostate. It is done quickly (approximately two to three hours), in a single session at the Maimonides’ ambulatory surgery center. Patients like the ability to get in and out, with minimal exposure to the healthcare system. Focal therapy HIFU is ideal for this.