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Partial wavelet encoding: A new approach for accelerating temporal resolution in contrast‐enhanced MR imaging
Author(s) -
Shimizu Kenji,
Panych Lawrence P.,
Mulkern Robert V.,
Yoo SeungSchik,
Schwartz Richard B.,
Kikinis Ron,
Jolesz Ferenc A.
Publication year - 1999
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/(sici)1522-2586(199905)9:5<717::aid-jmri15>3.0.co;2-j
Subject(s) - contrast (vision) , computer science , wavelet , temporal resolution , encoding (memory) , resolution (logic) , artificial intelligence , computer vision , optics , physics
We propose a new approach using wavelet encoding to improve temporal resolution in contrast‐enhanced magnetic resonance (MR) imaging. Exploiting the unique property of wavelets localized in space and frequency, we construct an efficient encoding scheme to capture signal changes due to contrast agent uptake, which in general is spatially localized with low‐ and mid‐range frequency components. On the basis of space‐frequency analysis, we describe mathematical formulations of our method and discuss its theoretical advantages over Fourier‐based phase‐encoding methods (the keyhole and reduced‐encoding imaging by generalized‐series reconstruction [RIGR] techniques). The results obtained in computer simulations and a phantom study demonstrate the feasibility and practical advantages of our approach. J. Magn. Reson. Imaging 1999;9:717–724. © 1999 Wiley‐Liss, Inc.