Functional Brain Imaging |
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Page 173
... encoding in one direction ( X ) and phase encoding in the other direction ( Y ) . The constant " readout " gradient during data collection provides the frequency encoding while the set of repeated projections , each with a different ...
... encoding in one direction ( X ) and phase encoding in the other direction ( Y ) . The constant " readout " gradient during data collection provides the frequency encoding while the set of repeated projections , each with a different ...
Page 184
... encoding Gx ( Read out ) Gy ( Phase ) Gz ( slice select ) GRASE k - space trajectory kx Fig . 4-70 . GRASE sequences form and phase encode gradi- ent echoes between the series of RF echoes in order to obtain Fourier data more rapidly ...
... encoding Gx ( Read out ) Gy ( Phase ) Gz ( slice select ) GRASE k - space trajectory kx Fig . 4-70 . GRASE sequences form and phase encode gradi- ent echoes between the series of RF echoes in order to obtain Fourier data more rapidly ...
Page 439
... encoding of spatial position . This use of phase encoding is very similar to the procedures used in regular 2D and 3D imaging applications . The acquisition of spectral information means that frequency encoding of position cannot be ...
... encoding of spatial position . This use of phase encoding is very similar to the procedures used in regular 2D and 3D imaging applications . The acquisition of spectral information means that frequency encoding of position cannot be ...
Contents
Introduction to Brain Imaging | 1 |
Computerized Axial Tomography | 97 |
Magnetic Resonance Imaging | 145 |
Copyright | |
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Functional Brain Imaging William W. Orrison,Jeffrey Lewine,John Sanders,Michael F. Hartshorne Limited preview - 2017 |
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abnormal activity ALFMA arterial auditory Axial axon basal ganglia brain capillary cells central central sulcus cerebral blood flow chemical shift clinical coil computed computed tomography contrast agent cortex cortical decreased demonstrating detection diffusion dipole disease effects encoding epilepsy extracellular field strength FMRI focal frequency functional Gd-DTPA glucose gradient HMPAO infarction inhomogeneous injection lesions Magn Reson magnetic field magnetic resonance imaging mapping measured membrane metabolism methods motor msec neoplasms nerve nervous system neural neuromagnetic neurons normal Nucl nuclei oxygen paramagnetic patients pattern peak perfusion phase positron emission tomography posterior processing projections proton pulse Radon transform 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