Functional Brain Imaging |
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Page 103
... projections , that is , to find the corresponding inverse Radon transform . In practice , only estimates of the actual transform can be made since there are only a finite number of projections available . Furthermore , even though film ...
... projections , that is , to find the corresponding inverse Radon transform . In practice , only estimates of the actual transform can be made since there are only a finite number of projections available . Furthermore , even though film ...
Page 105
... projections , leads to cancellation of the blurring beyond the actual location of a point ( Fig . 3-11 ) . The filter to apply to the projections prior to backprojection must be modified from the theoretical value to avoid amplifying ...
... projections , leads to cancellation of the blurring beyond the actual location of a point ( Fig . 3-11 ) . The filter to apply to the projections prior to backprojection must be modified from the theoretical value to avoid amplifying ...
Page 172
... projections are taken , but now all the projections are made from one angle with differing amounts of phase twist . In x - ray CT , the phase information is not available so the projections must be taken from different angles . Instead ...
... projections are taken , but now all the projections are made from one angle with differing amounts of phase twist . In x - ray CT , the phase information is not available so the projections must be taken from different angles . Instead ...
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 |
Common terms and phrases
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