电阻抗断层成像与胃排空和胃动力检测  

Electrical impedance tomography measuring gastric emptying and gastric motility

作　　者：任超世[1] 王妍[1] 赵舒[1] 

机构地区：[1]中国医学科学院中国协和医科大学生物医学工程研究所,天津市300192

出　　处：《世界华人消化杂志》2008年第8期799-805,共7页World Chinese Journal of Digestology

基　　金：国家自然科学基金;No.60471041;国家科技支撑计划资助项目;No.2006BA103A14;天津市应用基础研究计划面上资助项目;No.06YFJMJC10900~~

摘　　要：电阻抗断层成像(EIT)是继形态、结构成像之后,于近20余年发展,出现的新一代医学成像技术,具有功能成像,无损伤和医学图像监护三大突出优势.其在胃肠领域的最多应用是评价通过胃部的食物流动以替代临床仍然视为胃排空测量金标准的核素法.在离体的模型实验中EIT可精确测量玻璃棒/气囊的容积变化.在体实验条件下,EIT能精确测量胃容积(气囊)的变化.EIT胃排空测量与染料稀释法、胃存留法、核素法等有较好的相关性.EIT胃动力测量以置于体表的电极阵列实现无损检测,以实时图像方式直接显示体内胃体的收缩和运动状况,将是胃动力检测与评价手段的重大进步,显示了诱人的应用前景.Electrical impedance tomography （EIT） is a novel medical imaging technology, which comes forth in recent 20 years following morphology imaging and structure imaging. EIT has the outstanding advantages of noninvasive, functional imaging and medical image monitoring. It has been mostly used in gastroenterology to assess flow of ingesta through the gastric region as an alternative to radionuclide studies. In vitro, EIT can accurately measure the volume of glass rods/balloons in a phantom. In humans, EIT can accurately measure gastric volume （balloons） in experimental conditions. Gastric emptying measurement of EIT has good correlations with dye dilution, gastric residuals and scintigraphy. By electrode array located on body surface,gastric motility measurement using EIT realizes noninvasive measurement and directly displays shrink and motility conditions of stomach in body by images of real time. This is going to be a great progress of gastric motility measurement and evaluation method. EIT gastric motility measurement has shown seductive application prospect.

关 键 词：电阻抗断层成像 胃排空 胃动力 生物电阻抗 

分 类 号：R573[医药卫生—消化系统]