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电阻抗断层成象术(EIT)是一种非侵入性无损的重建体内组织图象的技术。作为对外加激励的影响,体内不同的阻抗分布将会引起在体表测到不同的电压、电流值。应用这个事实,阻抗成象技术就能通过对人体加一已知电压,测量所引起的电流或加一已知电流测量所引起的电压的方法,重建体内阻抗分布的横截面图象。由于使用了不同的成象源,电阻抗断层成象技术对于现有的x线CT、核磁共振成象以及超声成象和其他医学成象模式是一种有前途的补充手段,是一种廉价、无危险的技术。电阻抗断层技术在医学成象的应用在过去五年中受到过更多的注意,其基本概念、
Electrical impedance tomography (EIT) is a noninvasive, nondestructive technique for reconstructing in vivo tissue images. As the impact on the external stimuli, different impedance distribution in the body will cause different voltage and current values to be measured on the body surface. Using this fact, impedance imaging techniques can be used to reconstruct cross-sectional images of the impedance distribution in vivo by applying a known voltage to the human body, measuring the induced current, or adding a voltage induced by a known current measurement. Due to the different imaging sources used, electrical impedance tomography is a promising complement to existing x-ray CT, MRI and ultrasound imaging and other medical imaging modalities and is a cheap , Non-hazardous technology. The application of electrical impedance tomography in medical imaging has received more attention in the past five years, and its basic concepts,