DocumentCode :
3604896
Title :
A 10.4 mW Electrical Impedance Tomography SoC for Portable Real-Time Lung Ventilation Monitoring System
Author :
Sunjoo Hong ; Jaehyuk Lee ; Joonsung Bae ; Hoi-Jun Yoo
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Volume :
50
Issue :
11
fYear :
2015
Firstpage :
2501
Lastpage :
2512
Abstract :
An electrical impedance tomography (EIT) SoC is proposed for the portable real-time lung ventilation monitoring system. The proposed EIT SoC is integrated into belt-typefabric system with 32 electrodes and can show the dynamic images of the lung ventilation on the mobile devices. To get high fidelity images, a T-switch is adopted for high off-isolation between electrodes more than 60 dB, and I/Q signal generation and demodulation can obtain both real and imaginary part of images. For the real-time imaging, an on-chip fast demodulation scheme is proposed, and it can also reduce speed requirements of ADC for low-power consumption. The proposed EIT SoC of 5.0 mm × 5.0 mm is fabricated in 0.18 μm CMOS technology, and consumes only 10.4 mW with 1.8 V supply. As a result, EIT images were reconstructed with 97.3% of accuracy and up to 20 frames/s real-time lung images can be displayed on the mobile devices.
Keywords :
CMOS integrated circuits; biomedical electrodes; biomedical imaging; electric impedance imaging; image reconstruction; low-power electronics; lung; patient monitoring; system-on-chip; CMOS technology; EIT images reconstruction; T-switch; belt-type fabric system; electrical impedance tomography SoC; electrodes; low-power consumption; mobile devices; on-chip fast demodulation scheme; portable real-time lung ventilation monitoring system; power 10.4 mW; real-time imaging; size 0.18 mum; voltage 1.8 V; Electrodes; Impedance; Lungs; Monitoring; System-on-chip; Tomography; Ventilation; Complex impedance; electrical impedance tomography (EIT); lung ventilation monitoring; planar-fashionable circuit board (P-FCB); real-time imaging;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2015.2464705
Filename :
7219475
Link To Document :
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