Functional Brain Imaging |
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Page 153
... coil Pulse X a angle Real signal Z Net magnetization in xy plane Signal induced in receiver coil rf receiver coil Free induction decay ( FID ) Time Fig . 4-12 . Radiofrequency ( RF ) energy changes the direction of the net magnetization ...
... coil Pulse X a angle Real signal Z Net magnetization in xy plane Signal induced in receiver coil rf receiver coil Free induction decay ( FID ) Time Fig . 4-12 . Radiofrequency ( RF ) energy changes the direction of the net magnetization ...
Page 292
... coil . Surface coils may also be employed to study somatomotor cortex ( among other sites ) , but the limited FOV most likely does not allow observation of bilateral or contralateral activations . As an alternative to the expensive ...
... coil . Surface coils may also be employed to study somatomotor cortex ( among other sites ) , but the limited FOV most likely does not allow observation of bilateral or contralateral activations . As an alternative to the expensive ...
Page 438
... coil can be specified by alter- ations to the coil design . Selective RF excitations and other modifications to the RF characteristics can further improve the localization ability , but surface coils are effective primarily in ...
... coil can be specified by alter- ations to the coil design . Selective RF excitations and other modifications to the RF characteristics can further improve the localization ability , but surface coils are effective primarily in ...
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