Functional Brain Imaging |
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Page 370
... spatial resolution of MEG is higher than that for EEG , and mathematical analyses of the spatial pattern of the neuromagnetic field can offer accurate spatial localization of the neurons responsible for generating neuromagnetic signals ...
... spatial resolution of MEG is higher than that for EEG , and mathematical analyses of the spatial pattern of the neuromagnetic field can offer accurate spatial localization of the neurons responsible for generating neuromagnetic signals ...
Page 385
... spatial gradient of the field is steep , whereas far from the source , the gradient is shallow . For example , field strength of a dipolar source de- creases by 75 % when the measuring distance is increased from 2 to 4 cm , but it ...
... spatial gradient of the field is steep , whereas far from the source , the gradient is shallow . For example , field strength of a dipolar source de- creases by 75 % when the measuring distance is increased from 2 to 4 cm , but it ...
Page 439
... spatial information , spatial information can be encoded in signal phase . However , as with most imaging sequences , phase encoding requires repeated acquisitions , which di- rectly lengthens the required imaging times . These ...
... spatial information , spatial information can be encoded in signal phase . However , as with most imaging sequences , phase encoding requires repeated acquisitions , which di- rectly lengthens the required imaging times . These ...
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