Title :
Removing signal intensity inhomogeneity from surface coil MRI using discrete wavelet transform and wavelet packet
Author :
Lin, Fa-Hsuan ; Chen, Ying-Jui ; Belliveau, John W. ; Wald, Lawrence L.
Abstract :
We evaluate a combined discrete wavelet transform (DWT) and wavelet packet algorithm to improve the homogeneity of magnetic resonance imaging when a surface coil is used for reception. The proposed algorithm estimates the spatial sensitivity profile of the surface coil from the original anatomical image and uses this information to normalize the image intensity variations. Estimation of the coil sensitivity profile based on the wavelet transform of the original image data is found to provide a robust method for removing the slowly varying spatial sensitivity pattern.
Keywords :
biomedical MRI; coils; discrete wavelet transforms; medical image processing; algorithm; image intensity variations normalization; magnetic resonance imaging; medical diagnostic imaging; original anatomical image; signal-to-noise advantage; slowly varying spatial sensitivity pattern removal; surface coil MRI; wavelet packet; Anatomy; Coils; Cutoff frequency; Discrete wavelet transforms; Filter bank; Low pass filters; Magnetic resonance imaging; Phased arrays; Surface waves; Wavelet packets;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1017365
