Functional Brain Imaging |
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Page 174
... space should be conjugate symmetric . This means that the top and bottom parts of the data in Fourier space should be the same . Since we are collecting data directly in Fourier space , it is possible to use this property and generate ...
... space should be conjugate symmetric . This means that the top and bottom parts of the data in Fourier space should be the same . Since we are collecting data directly in Fourier space , it is possible to use this property and generate ...
Page 178
... space are shown in Fig . 4-60 for the cases of both gradients being applied together or separately . The effect of each gradient and the 180 - degree RF inversion pulse on the path taken in Fourier space can be seen in these examples ...
... space are shown in Fig . 4-60 for the cases of both gradients being applied together or separately . The effect of each gradient and the 180 - degree RF inversion pulse on the path taken in Fourier space can be seen in these examples ...
Page 180
... space ( containing the lowest image spatial frequen- cies ) will determine the primary contrast features of the resulting image.21 The variation in intensity among the Fourier space lines effectively results in the data being filtered ...
... space ( containing the lowest image spatial frequen- cies ) will determine the primary contrast features of the resulting image.21 The variation in intensity among the Fourier space lines effectively results in the data being filtered ...
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