Current Sources for Electrical Impedance Tomography IMPETOM

被引：0

作者：

Sanchez, Pablo ^{[1
,2
]}

David, Marcelo ^{[3
]}

Gonzalez, Mariana ^{[1
,2
]}

Morales, Isabel ^{[1
,2
]}

Simini, Franco ^{[1
,2
]}

机构：

[1] Univ Republica, Fac Med, Nucleo Ingn Biomed, Montevideo, Uruguay

[2] Univ Republica, Fac Ingn, Nucleo Ingn Biomed, Montevideo, Uruguay

[3] Jerusalem Coll Technol, Lev Acad Ctr, Dept Elect Engn, Jerusalem, Israel

来源：

ADVANCES IN BIOENGINEERING AND CLINICAL ENGINEERING, VOL 1, SABI 2023 | 2024年 / 106卷

关键词：

Electrical impedance tomography; bandwidth; total harmonic distortion; voltage-controlled current source; step response electrical impedance tomography;

D O I：

10.1007/978-3-031-61960-1_23

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Reliable current sources are imperative in Electrical Impedance Tomography (EIT) as it requires signals with minimum distortion and relatively broad bandwidth. In this work four current sources are compared, Howland modified amongst them, to select one for IMPETOM, our clinical EIT system. Bandwidth analysis (0.5 Hz-10 MHz), total harmonic distortion (up to 1.5%) and output current (1 mA to 5 mA) are studied for four current source designs. All configurations gave good results with bandwidths between 0.5 MHz and 3 MHz, driving loads of between 2 k Omega and 12 k Omega with up to 5 mA peak output currents and 1% maximum total harmonic distortion (THD). Among the options, we found the Negative Feedback current source (NFCS) to have the best performance for IMPETOM.

引用

页码：233 / 248

页数：16

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