Application of time-frequency distributions to magnetic resonance imaging of non-constant flow

Author

Sahiner, Berkman ; Yagle, Audrew

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

fYear

1990

fDate

3-6 Apr 1990

Firstpage

1865

Abstract

The exponential distribution (ED) developed by H.-I. Choi and W.J. Williams (see IEEE Trans. Acoust. Speech, Sig. Proc., ASSP-37, no.6, p.862-71, 1989) is applied to the problem of simultaneous determination of the velocity and spin density of a moving object in magnetic resonance imaging (MRI). The object velocity is assumed to be an affine function of location (reasonable for selectively imaged thin slice) and is determined from the trajectory of the maxima of the time-frequency distribution. Once the velocity is computed, its effects can be deconvolved from the MRI signal. This improves on previous results which require prior knowledge of either the velocity or discontinuities in the spin density. Numerical examples are presented

Keywords

biomedical NMR; MRI signal; exponential distribution; magnetic resonance imaging; nonconstant flow; spin density; time-frequency distributions; velocity; Equations; Exponential distribution; Magnetic resonance; Magnetic resonance imaging; Programmable logic arrays; Speech; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on

Conference_Location

Albuquerque, NM

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1990.115859

Filename

115859