Functional Brain Imaging |
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Page 167
... depends on the density of protons and the size of the region . The major source of noise in MR images is the electronic noise generated in the receiver circuit and the patient . The electronic noise introduced into the system depends on ...
... depends on the density of protons and the size of the region . The major source of noise in MR images is the electronic noise generated in the receiver circuit and the patient . The electronic noise introduced into the system depends on ...
Page 426
... depends on the type and number of nearby electrons . Changes in field strength are also related to the electronic ( chemical bond ) interactions with other atoms . If the electron magnetic field induced by the applied field opposes the ...
... depends on the type and number of nearby electrons . Changes in field strength are also related to the electronic ( chemical bond ) interactions with other atoms . If the electron magnetic field induced by the applied field opposes the ...
Page 441
... depends on the ratio of T2 * / T2 and therefore on B。 homogeneity . Localized volume . Another very successful ap- proach to spectral localization is to apply a series of slice - selective RF pulses so that only the spins in a ...
... depends on the ratio of T2 * / T2 and therefore on B。 homogeneity . Localized volume . Another very successful ap- proach to spectral localization is to apply a series of slice - selective RF pulses so that only the spins in a ...
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