Intraoperative ultrasound (IOUS) is a dynamic imaging modality that provides interactive and timely information during surgical procedures. Because the transducer is in direct contact with the organ being examined, high-resolution images can be obtained that are not degraded by air, bone, or overlying soft tissues.

IOUS can facilitate and optimize surgical procedures in several ways. It can accurately localize pathology, guide intraoperative biopsies, limit the extent of surgical resection, improve surgical staging, guide surface incisions for deep lesion resection, and even help the surgeon choose the optimal procedure. Furthermore, it is safe for both patient and staff.