Audio Codec and Digital Signal Processor for an Electrical Impedance Tomography System

被引：0
|
作者：
Alfaro, N. [1 ]
Arregui, M. [1 ]
Martinucci, F. [1 ]
Santos, E. [1 ]
Simini, F. [1 ]
机构：
[1] Univ Republica, Fac Med & Ingn, Nucleo Ingn Biomed, Montevideo, Uruguay
来源：
II LATIN AMERICAN CONFERENCE ON BIOIMPEDANCE | 2016年 / 54卷
关键词：
Electrical Impedance Tomography; Audio Codec; Digital Signal Processor; Synchronous Demodulation; Howland Current Source;
D O I：
10.1007/978-981-287-928-8_5
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
Electrical Impedance Tomography (EIT) can estimate thorax fluid/air content and distribution. Its use in critically ill patients is promising and may prove clinically useful. Currents are injected and voltages measured in the thorax boundary. The measurements are used to reconstruct tomographic images. An EIT system was implemented based on evaluation board OMAP-L137 (Spectrum Digital) and Howland current source. The board main components are the OMAP-L137 processor with DSP C6747 and AIC 3106 audio codec (Texas Instrument). Fewer than 5% difference in voltages against the oscilloscope was measured in the range between 42mV and 1.5V. The entire system showed 8.53% difference when measuring the real part of impedance.
引用
收藏
页码：16 / 19
页数：4
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