Title :
A real-time electrical impedance tomography system for clinical use-design and preliminary results
Author :
Smith, Robert W M ; Freeston, Ian Leslie ; Brown, Brian Hilton
Author_Institution :
Dept. of Electron. & Electr. Eng., Sheffield Univ., UK
Abstract :
An instrument is described which produces images of the electrical impedance distribution within the body at a rate of 25 frames per second, allowing lung ventilation and lung perfusion to be observed in real time. The instrument makes impedance measurements using an array of 16 electrodes on the surface of the body, and reconstructs the images using a weighted backprojection technique. The design of the data acquisition electronics and the reconstruction and display processor are described. Some preliminary in vitro and in vivo results from the system are presented.
Keywords :
biomedical equipment; electric impedance imaging; clinical imaging instrument; data acquisition electronics design; display processor; electrical impedance distribution; electrodes array; human body; image reconstruction; lung perfusion; lung ventilation; medical diagnostic imaging; real-time electrical impedance tomography system; weighted backprojection technique; Electrodes; Image reconstruction; Impedance measurement; Instruments; Lungs; Real time systems; Surface impedance; Surface reconstruction; Tomography; Ventilation; Algorithms; Calibration; Computer Systems; Electric Impedance; Electrodes; Equipment Design; Humans; Image Processing, Computer-Assisted; Lung; Systole; Tomography;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
