Inflow-based vascular-space-occupancy (iVASO) MRIJun Hua
The Russell H Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
Magn Reson Med 66:40-56. 2011
..The onset of the hemodynamic response for iVASO occurred 1.2 ± 0.5 s (n = 7) faster than for conventional VASO...
- Measurement of absolute arterial cerebral blood volume in human brain without using a contrast agent
Jun Hua
The Russell H Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
NMR Biomed 24:1313-25. 2011
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- Effect of inflow of fresh blood on vascular-space-occupancy (VASO) contrast
Manus J Donahue
Russell H Morgan Department of Radiology and Radiological Science, Division of MR Research, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
Magn Reson Med 61:473-80. 2009
..4% +/- 0.2%) than short-TR data (DeltaS/S = -2.2% +/- 0.2%), implying that cerebral blood flow or transit-state effects may influence VASO contrast at short TR...
- Magnetization transfer enhanced vascular-space-occupancy (MT-VASO) functional MRI
Jun Hua
The Russell H Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
Magn Reson Med 61:944-51. 2009
..Therefore, MT-VASO should provide a means for increasing inherently low CNR in VASO experiments while preserving the CBV sensitivity...
- In vivo three-dimensional whole-brain pulsed steady-state chemical exchange saturation transfer at 7 T
Craig K Jones
Division of MR Research, Russell H Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
Magn Reson Med 67:1579-89. 2012
..Amide proton transfer effects ranged between 1.5% and 2.5% in selected white and grey matter regions. This power and time-efficient 3D pulsed CEST acquisition scheme should aid endogenous CEST quantification at both high and low fields...
- Physiological origin for the BOLD poststimulus undershoot in human brain: vascular compliance versus oxygen metabolism
Jun Hua
Russell H Morgan Department of Radiology and Radiological Science, Division of MR Research, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
J Cereb Blood Flow Metab 31:1599-611. 2011
..Using a biophysical model, their relative contributions were estimated to be 19.7±15.9% and 78.7±18.6%, respectively...
- The BOLD post-stimulus undershoot, one of the most debated issues in fMRI
Peter C M van Zijl
The Russell H Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
Neuroimage 62:1092-102. 2012
..The relative contribution of these different processes, which are not mutually exclusive and can act together, is likely to vary with stimulus duration and type...
- Practical data acquisition method for human brain tumor amide proton transfer (APT) imaging
Jinyuan Zhou
Division of MR Research, Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
Magn Reson Med 60:842-9. 2008
..In high-grade tumors, regions of increased APT extended outside of the core into peripheral zones, indicating the potential of this technique for more accurate delineation of the heterogeneous areas of brain cancers...
Quantitative description of the asymmetry in magnetization transfer effects around the water resonance in the human brainJun Hua
Department of Radiology, Division of MRI Research, Neurosection, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205 2109, USA
Magn Reson Med 58:786-93. 2007
..For white matter, this shift was fitted to be 2.34 +/- 0.17 ppm (N = 5) upfield from the water signal...
