Functional Brain Imaging |
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Page 165
A field gradient can be produced in any arbitrary direction by simultaneously
using combinations of all three gradient coils. Another consideration is the
gradient “rise time" or how much time is required to turn on and establish a
steady gradient ...
A field gradient can be produced in any arbitrary direction by simultaneously
using combinations of all three gradient coils. Another consideration is the
gradient “rise time" or how much time is required to turn on and establish a
steady gradient ...
Page 173
When the gradient is removed, the spins go back to all moving at the same rate
but are now out of phase by an amount depending on the strength and duration
of the gradient that each spin experienced. Realistically, the spin speed reflects ...
When the gradient is removed, the spins go back to all moving at the same rate
but are now out of phase by an amount depending on the strength and duration
of the gradient that each spin experienced. Realistically, the spin speed reflects ...
Page 178
The gradients in the readout (X) direction are designed to balance at the center of
the echo (TE), giving no phase encoding at that time. The amplitude of the phase-
encoding gradient selects the Fourier line being acquired. The corresponding ...
The gradients in the readout (X) direction are designed to balance at the center of
the echo (TE), giving no phase encoding at that time. The amplitude of the phase-
encoding gradient selects the Fourier line being acquired. The corresponding ...
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Contents
Introduction to Brain Imaging | 1 |
Computerized Axial Tomography | 97 |
Magnetic Resonance Imaging | 145 |
Copyright | |
6 other sections not shown
Other editions - View all
Functional Brain Imaging William W. Orrison,Jeffrey Lewine,John Sanders,Michael F. Hartshorne Limited preview - 2017 |
Common terms and phrases
abnormal activity arterial auditory Axial axon basal ganglia blood volume capillary cells central central sulcus cerebral blood flow cerebral cortex clinical coil components computed computed tomography contrast agent cortex cortical decreased demonstrating detection diffusion dipole disease effects encoding epilepsy extracellular field strength FMRI focal frequency frontal functional Gd-DTPA glucose gradient hemorrhage HMPAO infarction inhomogeneous injection lesions Magn Reson magnetic field magnetic resonance imaging mapping measured membrane metabolism metabolite methods motor msec neoplasms nerve nervous system neural neuromagnetic neurons normal Nucl nuclei oxygen paramagnetic patients pattern peak perfusion phase positron emission tomography processing projections proton pulse rCBF receptors relaxation scan seizures sensitivity sequences signal changes signal intensity slice SMRM Annual Meeting somatosensory spatial SPECT spectra spikes spin echo stimulation studies T2-weighted techniques temporal lobe thalamus tion tissue tumors uptake visual voxel white matter
Bibliographic information
| Title | Functional Brain Imaging |
| Author | William W. Orrison |
| Editor | William W. Orrison |
| Edition | illustrated |
| Publisher | Mosby, 1995 |
| Original from | the University of Michigan |
| Digitized | 5 Aug 2008 |
| ISBN | 0815165099, 9780815165095 |
| Length | 479 pages |
| Subjects | › Medical / Radiology, Radiotherapy & Nuclear Medicine |
| Export Citation | BiBTeX EndNote RefMan |