肝脏肿瘤是消化系统肿瘤中的最常见肿瘤,治疗上应尽早手术切除。但是,由于部分病例由于瘤体小、肿瘤多发或位置深等特点,术前往往难以正确定位、定性,导致手术中切除过多的肝组织,或者切缘不够,特别是术前影像学检查遗漏的病灶,尤其是微小病灶。随着术中超声(IOUS)技术的开展可发现许多其他影像学检查无法发现的病灶,并解决了上述 Liver tumors are the most common tumors in digestive system tumors and should be surgically removed as soon as possible. However, due to the small tumor size, multiple tumors or deep location in some cases, it is often difficult to correctly locate and characterize the tumor in some cases, resulting in the removal of excess liver tissue during operation or the insufficient margin, especially the missed preoperative imaging examination Of the lesions, especially the tiny lesions. With the development of intraoperative ultrasound (IOUS) technology can be found in many other lesions can not be found in imaging examination, and to solve the