Objective To demonstrate the feasibility and accuracy of the intellectual position(IP)technique used in ultrasound-guided biopsy.Methods Several red spheres,which were 10 mm in diameter and visible in ultrasound,randomly placed in the tissue mimicking gel phantom.The biopsy was performed by two operators respectively.Each operator chose 25 spheres,each of which were performed biopsy guided by IP technique,free-hand ultrasound and ultrasound with guide bracket.The red dye in the biopsied sample meant successful performance.The time spend in per biopsy target,the success rate of biopsy and the length of the red dyed sample of the three methods were recorded,and comparison was made among them.Results The median time took in biopsy guided by IP technique was 95(rang,80-110)s,which was longer than that of free-hand ultrasound-guide[30 (rang,22-42) s,P ＜0.001] and ultrasound-guide with bracket [20(rang,15-28)s,P ＜0.001].The success rate of biopsy guided by IP technique was 98.0％ (49/50)which was as well as that guided by ultrasound-guide with bracket(96.0％,48/50,P =0.558),better than free-hand ultrasound-guide(78.0％,39/50,P =0.002).The median length of red dyed sample biopsied guided by IP technique was 8.0 (rang,7.0-8.5)mm,which was longer than that of free-hand ultrasoundguide[6.0(rang,4.0-8.0)mm,P =0.003] and ultrasound-guide with bracket[7.0(rang,6.0-8.0)mm,P =0.003].There was no statistically difference between the two operators in length of red dyed sample and success rate of biopsy guided by IP technique(P ＞0.05).Conclusions Biopsy guided by IP technique is a feasible and accuracy method,which will become an effectively supplement of the ultrasound-guide with bracket.%目的 探讨超声智能定位(intellectual position,IP)技术引导穿刺活检的可行性及准确性.方法 制作仿组织模型,内含超声可见直径10 mm的红色球形目标.由两名操作者各针对25个目标,采用IP技术引导、超声徒手穿刺及导架引导3种方法对每个目标分别活检一次,记录和比较3种引导方法的操作时间、活检成功率及检出目标组织的长度,并分析IP技术引导穿刺活检的可重复性.结果 IP技术引导、超声徒手穿刺及导架引导活检的操作时间分别为95(80～110)s、30(22～42)s及20(15～28)s,活检成功率分别为98.0％(49/50)、78.0％(39/50)及96.0％(48/50),检出目标组织长度分别为8.0(7.0～8.5)mm、6.0(4.0～8.0)mm及7.0(6.0～8.0)mm.其中IP引导活检操作时间长于超声徒手穿刺及导架引导,差异具有统计学意义(P＜0.05)；活检成功率与导架引导相当(P=0.558),优于徒手穿刺活检(P=0.002)；获取目标组织长度高于超声徒手穿刺及导架引导(P＜0.05).两名操作者使用IP技术引导活检成功率及检出目标组织长度差异均无统计学意义(P＞0.05).结论 IP技术引导穿刺活检是可行的,且具较高的准确性和可重复性,有可能成为导架引导活检的有效补充.
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