ACT3 - A HIGH-SPEED, HIGH-PRECISION ELECTRICAL-IMPEDANCE TOMOGRAPH
ACT3 - A HIGH-SPEED, HIGH-PRECISION ELECTRICAL-IMPEDANCE TOMOGRAPH
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DOI：
10.1109/10.310086
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发表时间：
1994-08-01
影响因子：
4.6
通讯作者：
ISAACSON, D
中科院分区：
文献类型：
--
作者：
COOK, RD;SAULNIER, GJ;ISAACSON, D
本文介绍了Rensselaer的第三代自适应电流断层扫描仪ACT3的设计、实现和性能。该系统使用32个电流源和32个相敏电压表，构成了一个能够施加任意电流空间模式的32电极系统。该仪器提供16 b精度的电流值以及实际和无功电压读数，并可在133毫秒内采集单个图像的数据。此外，该仪器还能够在计算机控制下自动校准其电压表和电流源，并调整电流源输出阻抗。详细讨论了系统的主要组成部分，并给出了性能测试结果。图中显示了使用固定的琼脂目标和模型中的运动摆获得的图像，以及显示人类呼吸的活体电阻率曲线。
This paper presents the design, implementation, and performance of Rensselaer's third-generation Adaptive Current Tomograph, ACT3. This system uses 32 current sources and 32 phase-sensitive voltmeters to make a 32-electrode system that is capable of applying arbitrary spatial patterns of current. The instrumentation provides 16 b precision on both the current values and the real and reactive voltage readings and can collect the data for a single image in 133 ms. Additionally, the instrument is able to automatically calibrate its voltmeters and current sources and adjust the current source output impedance under computer control. The major system components are discussed in detail and performance results are given. Images obtained using stationary agar targets and a moving pendulum in a phantom as well as in vivo resistivity profiles showing human respiration are shown.