Functional Brain Imaging |
From inside the book
Results 1-3 of 79
Page 157
... Signal + Fat H2O Time Signal Characteristics There are two aspects to the use of NMR for imaging : ( 1 ) spatial encoding of the signals from different parts of the object so they can be distin- guished and ( 2 ) the characteristics of ...
... Signal + Fat H2O Time Signal Characteristics There are two aspects to the use of NMR for imaging : ( 1 ) spatial encoding of the signals from different parts of the object so they can be distin- guished and ( 2 ) the characteristics of ...
Page 162
... signal at the echo time ( TE ) will be reduced accordingly . a 180 - degree pulse and collecting the signals during ... signal from the excitation pulse may be picked up by the receiving coil and will disrupt the detected signal ...
... signal at the echo time ( TE ) will be reduced accordingly . a 180 - degree pulse and collecting the signals during ... signal from the excitation pulse may be picked up by the receiving coil and will disrupt the detected signal ...
Page 165
... signal at a slightly different frequency ( Fig . 4-36 ) . Thus the presence of the gradient has " frequency encoded " the object along the direction of the gradient . For each frequency component of the measured signal we can use the ...
... signal at a slightly different frequency ( Fig . 4-36 ) . Thus the presence of the gradient has " frequency encoded " the object along the direction of the gradient . For each frequency component of the measured signal we can use the ...
Contents
Introduction to Brain Imaging | 1 |
Computerized Axial Tomography | 97 |
Magnetic Resonance Imaging | 145 |
Copyright | |
6 other sections not shown
Other editions - View all
Functional Brain Imaging William W. Orrison,Jeffrey Lewine,John Sanders,Michael F. Hartshorne Limited preview - 2017 |
Common terms and phrases
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