A CURRENT INJECTING DEVICE FOR ELECTRICAL-IMPEDANCE TOMOGRAPHY

被引：3

作者：

BLAD, B ^{[1
]}

LINDSTROM, K ^{[1
]}

BERTENSTAM, L ^{[1
]}

PERSSON, BRR ^{[1
]}

HOLMER, NG ^{[1
]}

机构：

[1] LUND INST TECHNOL, DEPT ELECT MEASUREMENTS, S-22007 LUND, SWEDEN

来源：

PHYSIOLOGICAL MEASUREMENT | 1994年 / 15卷

关键词：

D O I：

10.1088/0967-3334/15/2A/010

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

Electrical impedance tomography (EIT) has to be improved in order to become an accepted diagnostic technique in clinical use. The aim of this study is to improve the hardware of this technique and preferably upgrade the current injecting device. Instead of using a constant current generator the idea is to implement a voltage source and measure current accurately, in order to improve the resolution in the image. The performance of such a device is analysed, particularly concerning theoretical and practical limitations. The amplitude and phase accuracy, noise and settling time are measured and presented in diagrams, The results show that improvements are possible to achieve and that such a device will improve the stability of an EIT system and the image quality.

引用

页码：A69 / A77

页数：9

共 29 条

[11]

LIDGEY FJ, 1990, 1990 P CAEIT EEC WOR, P1

[12]

MCLEOD CN, 1990, 1990 P CAEIT EEC WOR, P191

[13]

Mohapatra S., 1981, NONINVASIVE CARDIOVA

[14] CHANGES IN BLOOD RESISTIVITY WITH HEMATOCRIT AND TEMPERATURE [J].

MOHAPATRA, SN ;

HILL, DW .

EUROPEAN JOURNAL OF INTENSIVE CARE MEDICINE, 1975, 1 (04) :153-162

[15]

Murphy D, 1987, Clin Phys Physiol Meas, V8 Suppl A, P131, DOI 10.1088/0143-0815/8/4A/017

[16] AN ELECTRIC-CURRENT TOMOGRAPH [J].

NEWELL, JC ;

GISSER, DG ;

ISAACSON, D .

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 1988, 35 (10) :828-833

[17]

NOWICKI DJ, 1989, 11TH IEEE ANN INT C, P457

[18]

Ott H. W., 1988, NOISE REDUCTION TECH

[19]

RECORD P, 1990, 1990 P CAEIT EEC WOR, P168

[20]

RIGAUD B, 1990, 1990 P CAEIT EEC WOR, P217

← 1 2 3 →