J A Helpern

MR perfusion imaging in human brain using the UNFAIR technique

J L Tanabe, M Yongbi, C Branch, 1999, Journal of magnetic resonance imaging : JMRI.

Motion correction in MRI using an apparatus for dynamic angular position tracking (ADAPT)

J A Helpern, A Peshkovsky, K H Knuth, 2003, Magnetic resonance in medicine.

A quantitative comparison of motion detection algorithms in fMRI.

J A Helpern, B A Ardekani, A H Bachman, 2003, Magnetic resonance imaging.

Human focal cerebral ischemia: evaluation of brain pH and energy metabolism with P-31 NMR spectroscopy.

J A Helpern, S. Levine, R. Ordidge, 1992, Radiology.

Predicting Grade of Cerebral Glioma Using Vascular-Space Occupancy MR Imaging

G Johnson, J A Helpern, J. Helpern, 2008, American Journal of Neuroradiology.

Temporal evolution of ischemic damage in rat brain measured by proton nuclear magnetic resonance imaging.

R A Knight, M Chopp, J A Helpern, 1991, Stroke.

The Effect of Hypothermia on Transient Focal Ischemia in Rat Brain Evaluated by Diffusion- and Perfusion-Weighted NMR Imaging

M Chopp, J A Helpern, R J Ordidge, 1994, Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism.

RF excitation profiles with FAIR: Impact of truncation of the arterial input function on quantitative perfusion

J Hrabe, J A Helpern, D P Lewis, 2001, Journal of magnetic resonance imaging : JMRI.

Quantitative Assessment of Iron Accumulation in the Deep Gray Matter of Multiple Sclerosis by Magnetic Field Correlation Imaging

J A Helpern, Y Ge, R I Grossman, 2007, American Journal of Neuroradiology.

Histopathological correlations of nuclear magnetic resonance imaging parameters in experimental cerebral ischemia.

R A Knight, M Chopp, J A Helpern, 1993, Magnetic resonance imaging.

In vivo 31P NMR profiles of Alzheimer's disease and multiple subcortical infarct dementia

J A Helpern, J. Pettegrew, K. Welch, 1989, Neurology.

Perfusion imaging using FOCI RF pulses

M N Yongbi, J A Helpern, J. Helpern, 1998, Magnetic resonance in medicine.