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Proceedings Paper

Wavelet enhancement method to visualise heart blood flow
Author(s): Alfredo O. Rodriguez; Peter Mansfield
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Paper Abstract

Flow images generated with Echo-Planar Imaging (EPI) show a poor Signal-to-Noise Ratio (SNR). To improve the resolution of EPI flow maps, so a better SNR can be obtained without loss of spatial resolution and with minimal sacrifice of motion effects. The continuous transform of Coiflets wavelet is applied to 2D velocity maps to enhance image SNR. Wavelet coefficients of velocity maps of the cardiac chambers and the descending aorta were calculated. These velocity maps were earlier obtained by Half Fourier Echo-Planar Imaging (HF-EPI). Wavelet coefficient images and contour maps are shown. The enhanced images are compared with previous velocity maps. Cardiac contour maps show hemodynamic patterns in cardiac chambers and descending aorta. Improvement of image quality with other wavelets, such as Mexican Hat, Morlet, Meyer, Daubechies, is briefly discussed.

Paper Details

Date Published: 6 June 2000
PDF: 10 pages
Proc. SPIE 3979, Medical Imaging 2000: Image Processing, (6 June 2000); doi: 10.1117/12.387653
Show Author Affiliations
Alfredo O. Rodriguez, Univ. Autonoma Metropolitana/Iztapalapa (Mexico)
Peter Mansfield, Univ. of Nottingham Magnetic Resonance Ctr. (United Kingdom)

Published in SPIE Proceedings Vol. 3979:
Medical Imaging 2000: Image Processing
Kenneth M. Hanson, Editor(s)

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