RecruitingDevice studyHIFU for Focal Ablation of Prostate Tissue: An Observational StudyThe Sonablate HIFU device was approved by the U.S.FDA for prostate tissue ablation in October, 2015. The purpose of this observational research study is to investigate the localized treatment of prostate cancer using HIFU through clinical data and health-related quality of life (HRQOL) questionnaires.