Low-field 3-DFT MRI: conceptual, analytical, and experimental aspects

Author

Kramer, David M. ; Kaufman, Leon ; Rothschild, Peter ; Hale, James ; Wummer, Jole ; Hake, Kristen K.

Author_Institution

California Univ., San Francisco, CA, USA

Volume

10

Issue

3

fYear

1991

fDate

9/1/1991 12:00:00 AM

Firstpage

382

Lastpage

386

Abstract

Three-dimensional Fourier transform (3-DFT) magnetic resonance imaging (MRI) offers advantages in terms of signal-to-noise (S/N) per unit of time for the case where a large number of slices is desired. This advantage is enhanced when the relaxation time, T₁, is short. Because time limitations in 3-DFT imaging force the use of short time intervals, TR, between excitations of a slice, lesion contrast is often undesirable at mid-and high-field strength even when the S/N is good. At low fields, where T₁ values are short, high S/N and contrast can both be achieved with 3-DFT MR images. The conceptual and analytical aspects of low-field 3-DFT MRI are presented and demonstrated at 640 G

Keywords

Fourier transforms; biomedical NMR; 640 G; T₁; lesion contrast; low-field 3D Fourier transform magnetic medical diagnostic imaging; relaxation time; signal-to-noise; Availability; Costs; Fourier transforms; Lesions; Magnetic analysis; Magnetic fields; Magnetic resonance imaging; Silicon compounds; Superconducting device noise; Superconducting magnets;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.97588

Filename

97588