Use of statistical parametric mapping (SPM) to enhance electrical impedance tomography (EIT) image sets.

Yerworth, Rebecca J. and Zhang, Yan and Tidswell, A.T. and Bayford, Richard and Holder, David S. (2007) Use of statistical parametric mapping (SPM) to enhance electrical impedance tomography (EIT) image sets. Physiological measurement, 28 (7). S141-S151. ISSN 0967-3334

Full text is not in this repository.

This item is available in the Library Catalogue

Abstract

Use of statistical parametric mapping (SPM), which is widely used in analysis of neuroimaging studies with fMRI and PET, has the potential to improve quality of EIT images for clinical use. Minimal modification to SPM is needed, but statistical analysis based on height, not extent thresholds, should be employed, due to the 20–80% variation of the point spread function, across EIT images. SPM was assessed in EIT images reconstructed with a linear time difference algorithm utilizing an anatomically realistic finite element model of the human head. Images of the average of data sets were compared with those produced using SPM over 10–40 individual image data sets without averaging. For a point disturbance, a sponge 15% of the diameter of an anatomically realistic saline-filled tank including a skull, with a contrast of 15%, and for visual evoked response data in 14 normal human volunteers, images produced with SPM were less noisy than the average images. For the human data, no consistent physiologically realistic changes were seen with either SPM or direct reconstruction; however, only a small data set was available, limiting the power of the SPM analysis. SPM may be used on EIT images and has the potential to extract improved images from clinical data series with a low signal-to-noise ratio.

Item Type:Article
Research Areas:School of Science and Technology > Computer and Communications Engineering
School of Science and Technology > Natural Sciences
Citations on ISI Web of Science:3
ID Code:2403
Useful Links:
Deposited On:21 May 2009 15:36
Last Modified:13 May 2014 15:42

Repository staff and depositor only: item control page

Full text downloads (NB count will be zero if no full text documents are attached to the record)

Downloads per month over the past year