Functional Brain Imaging |
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Page 370
The 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 .
The 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 372
During an event - related experiment , such as for presurgical mapping of the
spatial relationship between the primary somatosensory cortex and a tumor , the
neuromagnetic field is recorded while the surface of a finger is repeatedly ...
During an event - related experiment , such as for presurgical mapping of the
spatial relationship between the primary somatosensory cortex and a tumor , the
neuromagnetic field is recorded while the surface of a finger is repeatedly ...
Page 385
This means that near a source , the spatial gradient of the field is steep , whereas
far from the source , the gradient is shallow . For example , field strength of a
dipolar source decreases by 75 % when the measuring distance is increased
from 2 ...
This means that near a source , the spatial gradient of the field is steep , whereas
far from the source , the gradient is shallow . For example , field strength of a
dipolar source decreases by 75 % when the measuring distance is increased
from 2 ...
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Contents
Introduction to Brain Imaging | 1 |
Computerized Axial Tomography | 97 |
Magnetic Resonance Imaging | 145 |
Copyright | |
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Other editions - View all
Functional Brain Imaging William W. Orrison,Jeffrey Lewine,John Sanders,Michael F. Hartshorne Limited preview - 2017 |
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abnormal activity additional agents allow appearance applications arterial associated blood flow brain cause cells central cerebral changes clinical complex components computed concentration considered contrast cortex cortical decreased demonstrating depends detection diffusion direction disease echo effects emission et al evoked FMRI frequency functional glucose gradient human imaging important increased indicator injection intensity lateral less levels limited localization Magn Reson magnetic field mapping matter measured membrane methods motor nerve neurons normal Nucl nuclei object observed obtained occur oxygen particular patients pattern peak perfusion phase potential primary processing produce projections pulse recorded regions relative relaxation resolution response scan sensitivity sequences shift signal significant space spatial SPECT stimulation strength structure studies techniques temporal tion tissue tomography tumors typically visual volume York