Volume 34, Issue 3 pp. 498-502
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MR imaging of regional cardiac function: Low-pass filtering of wall thickness curves

Hildo J. Lamb MSc

Corresponding Author

Hildo J. Lamb MSc

Department of Diagnostic Radiology, University Hospital Leiden, The Netherlands

Department of Diagnostic Radiology, Building 1, C2-S, University Hospital Leiden, Rijnsburgerweg 10, 2333 AA Leiden, The Netherlands===Search for more papers by this author
Ross R. Singleton

Ross R. Singleton

Department of Cardiovascular Disease, University of Alabama at Birmingham

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Rob J. Der Van Geest

Rob J. Der Van Geest

Laboratory for Clinical and Experimental Image Processing, University Hospital Leiden, The Netherlands

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Gerald M. Pohost

Gerald M. Pohost

Department of Cardiovascular Disease, University of Alabama at Birmingham

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Albert De Roos

Albert De Roos

Department of Diagnostic Radiology, University Hospital Leiden, The Netherlands

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First published: September 1995
Citations: 17

Abstract

Wall thickness curves (WTCs) derived from MR images are subject to considerable measurement error. This study determines the effects of low-pass Fourier filtering of WTCs on functional parameters derived from the curve: peak rate of wall thinning (PRWT) and time to PRWT (TPRWT). The inter-subject standard deviation (SD) of PRWT changed from 0.35 to 0.18, and the SD of TPRWT from 34.3 to 29.5. Differences between neighboring segments decreased from 0.31 to 0.15% mean thickness/ms for PRWT (P = 0.012), and from 35.0 to 19.0 ms for TPRWT (P = 0.005). It is concluded that filtering of MR imaging-derived WTCs contributes to a better representation of myocardial wall motion.

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