随影像医学发展，使手感不能触及的乳癌得以发现，其中超声波成像技术在诊断中发挥了重要作用。对早期触不到肿块的乳癌，术前以金属细针刺入乳腺X光摄片并以B超定位可指导切除病灶；由于针尖刺入角度不同或随体位、皮肤活动而移位，不一定准确，常在术中被迫扩大切口、切除过 With the development of imaging medicine, breast cancer that can not be touched can be found, and ultrasound imaging technology plays an important role in diagnosis. For those breast cancers that can’t touch the tumor in the early stage, preoperative metal needles are used to penetrate the mammogram and B-positioning can guide the resection of lesions; due to the different angles of needle insertion or displacement with position and skin activity, not necessarily Accurate, often forced to expand incisions, resections during surgery