Gadi Goelman | Researchain

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Journal of Magnetic Resonance | 1990

Transverse Hadamard spectroscopic imaging technique

Gadi Goelman; V. Harihara Subramanian; John S. Leigh

Abstract A new Hadamard spectroscopic imaging (HSI) technique based on transverse magnetization encoding is presented and tested experimentally. Using average Hamiltonian theory, we have defined the conditions under which a proper combination of gradients and RF functions can produce, as a good approximation, a plane rotation whose flip angle is the Fourier transform of the RF function even in the presence of chemical-shift and B0 inhomogeneity. Hence, the generation of RF pulses to perform any order HSI is simplified.

Magnetic Resonance Imaging | 1993

Spectral localization of arbitrarily shaped regions of interest (SLASH) using single voxel signals

Zhiyue J. Wang; Ravinder Reddy; John C. Haselgrove; Cheng Yu Chen; Gadi Goelman; Robert A. Zimmerman; John S. Leigh

A method for obtaining localized spectra from arbitrarily shaped regions of interest is described. When a sample consists of homogeneous compartments or domains, spectra localized in each compartment can be obtained from signals of single voxels with regular shapes by solving a set of simultaneous linear equations. Experimental demonstrations on a phantom and on human brain in vivo for a two compartment, two voxel case are presented. The issue of signal-to-noise ratio is also discussed.

Magnetic Resonance in Medicine | 1997

3D localized in vivo 1H spectroscopy of human brain by using a hybrid of 1D-Hadamard with 2D-chemical shift imaging.

Oded Gonen; Fernando Arias-Mendoza; Gadi Goelman

Magnetic Resonance in Medicine | 1998

3D multivoxel proton spectroscopy of human brain using a hybrid of 8th-order hadamard encoding with 2D chemical shift imaging

Oded Gonen; James B. Murdoch; Radka Stoyanova; Gadi Goelman

Magnetic Resonance in Medicine | 1995

Hybrid Three Dimensional (1D‐Hadamard, 2D‐Chemical Shift Imaging) Phosphorus Localized Spectroscopy of Phantom and Human Brain

Oded Gonen; Jiani Hu; Radka Stoyanova; John S. Leigh; Gadi Goelman; Truman R. Brown

Magnetic Resonance in Medicine | 1992

Hadamard spectroscopic imaging technique as applied to study human calf muscles

Gadi Goelman; Glenn A. Walter; John S. Leigh

Archive | 1997

Three-dimensional localized proton NMR spectroscopy using a hybrid of one-dimensional hadamard with two-dimensional chemical shift imaging

Oded Gonen; Gadi Goelman; John S. Leigh; Lizann Bolinger

Magnetic Resonance in Medicine | 1997

Two methods for peak RF power minimization of multiple inversion‐band pulses

Gadi Goelman

American Journal of Physiology-cell Physiology | 1993

pH heterogeneity during exercise in localized spectra from single human muscles

Krista Vandenborne; Glenn A. Walter; J. S. Leigh; Gadi Goelman

Journal of Magnetic Resonance, Series B | 1994

Fast Hadamard spectroscopic imaging techniques

Gadi Goelman

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