IMPLEMENTATION OF WAVELET-ENCODED MR-IMAGING

被引：70

作者：

PANYCH, LP ^{[1
]}

JAKAB, PD ^{[1
]}

JOLESZ, FA ^{[1
]}

机构：

[1] MIT,GRAD PROGRAM RADIOL SCI,CAMBRIDGE,MA 02139

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1993年 / 3卷 / 04期

关键词：

ADAPTIVE-RESOLUTION IMAGING; IMAGE PROCESSING; MATHEMATICAL MODEL; PULSE SEQUENCES; RAPID IMAGING; WAVELET ENCODING;

D O I：

10.1002/jmri.1880030415

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Reconstructions of images from wavelet-encoded data are shown. The method of MR wavelet encoding in one dimension was proposed previously by Weaver and Healy. The technique relies on selective excitation with wavelet-shaped profiles generated by special radio-frequency waveforms. The result of the imaging sequence is a set of inner products of the image with orthogonal functions of the wavelet basis. Inversion of the wavelet data is accomplished with an efficient algorithm with processing times comparable with those of a fast Fourier transform. The experiments show that wavelet encoding by selective excitation of wavelet-shaped profiles is feasible. Wavelet-encoded images are compared with phase-encoded images that have a similar signal-to-noise ratio. and there is no discernible degradation in image quality due to the wavelet encoding. Potential benefits of wavelet encoding are briefly discussed.

引用

页码：649 / 655

页数：7

共 9 条

[1]

Weaver JB, Xu Y, Healy DM, Driscoll JR, Wavelet‐encoded MR imaging, Magn Reson Med, 24, pp. 275-287, (1992)

[2]

Healy DM, Weaver JB, Two applications of wavelet transforms in magnetic resonance imaging, IEEE Trans Inf Theory, 38, pp. 840-862, (1992)

[3]

Hu X., Tewfik AH, Garnaoui H, A new wavelet based MR imaging technique (abstr), Book of abstracts: Society of Magnetic Resonance in Medicine 1992, (1992)

[4]

Panych LP, Jakab PD, Wavelet encoding in the section‐select dimension (abstr), JMRI, 2, P, (1992)

[5]

Panych LP, Jakab PD, Jolesz FA, Progress towards real‐time adaptive imaging using wavelet transform encoding (abstr), Book of abstracts: Society of Magnetic Resonance in Medicine 1992, (1992)

[6]

Daubechies I, The wavelet transform, time‐frequency localization and signal analysis, IEEE Trans Inf Theory, 36, pp. 961-1005, (1990)

[7]

Daubechies I, Orthonormal bases of compactly supported wavelets, Communications on Pure and Applied Mathematics, 41, pp. 909-996, (1988)

[8]

Mallat SG, A theory for multiresolution signal decomposition: the wavelet representation, IEEE Trans Pattern Anal Machine Intell, 11, pp. 674-693, (1989)

[9]

Lewis AS, Knowles G, Video compression using 3D wavelet transforms, Electron Lett, 26, pp. 396-398, (1990)

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