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2008.62: GREIT: towards a consensus EIT algorithm for lung images,

2008.62: Andy Adler, John Arnold, Richard Bayford, Andrea Borsic, Brian Brown, Paul Dixon, Theo Faes, Inez Frerichs, Herve Gagnon, Yvo Garber, Bartlomiej Grychtol, Gunter Hahn, William Lionheart, Anjum Malik, Janet Stocks, Andrew Tizzard, Norbert Weiler and Gerhard Wolf (2008) GREIT: towards a consensus EIT algorithm for lung images,. In: 9th EIT conference 2008, 16-18th June 2008, Dartmouth New Hampshire.

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Abstract

Recently, electrical impedance tomogra- phy (EIT) has begun to see a signi¯cant clinical in- terest for monitoring of ventilated patients. The key capability of EIT is to provide real-time images of the distribution of ventilation in the patient's lungs. However, most clinical and physiological research in lung EIT is done using older and proprietary algo- rithms; this is an obstacle to interpretation of EIT results because the reconstructed images are not well characterized. To address this issue, we are devel- oping a consensus linear reconstruction algorithm for lung EIT, called GREIT (Graz consensus Reconstruc- tion algorithm for EIT). This algorithm is being de- veloped in three phases: 1) selection of the "ingre- dients" and evaluation methodology (this paper), 2) evaluation and experience with GREIT variants, and 3) consensus and definition of the GREIT algorithm. Algorithms evaluation criteria are identified to be: a) quantitative output for all positions, b) reconstructed position error (low and uniform), c) resolution (small PSF, uniform, few artefacts), d) good noise perfor- mance, e) low sensitivity to electrode and boundary movement, f) good performance on clinical and exper- imental data. This approach represents the consensus of a large and representative group of experts in EIT algorithm and clinical applications. All software and data to implement and test GREIT will be made avail- able under an open source license which allows free research and commercial use.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:biomedical EIT reconstruction chest
Subjects:PACS 2003 > 87 Biological and medical physics
MIMS number:2008.62
Deposited By:Prof WRB Lionheart
Deposited On:26 June 2008

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