Functional Brain Imaging |
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Page 162
William W. Orrison. Mo T2 decay T2 * decay Echo 1 Signal amplitude Echo 2 Echo 3 Echo 4 180 , 1802 1803 1804 1TE 2TE 3TE 4TE Time Transverse magnetization Long T1 component = ( CSF ) Short T2 component = ( white matter ) TE Time , t Fig ...
William W. Orrison. Mo T2 decay T2 * decay Echo 1 Signal amplitude Echo 2 Echo 3 Echo 4 180 , 1802 1803 1804 1TE 2TE 3TE 4TE Time Transverse magnetization Long T1 component = ( CSF ) Short T2 component = ( white matter ) TE Time , t Fig ...
Page 178
... echo . Spin echo sequences are still the most commonly used sequences and serve as a reference to describe the image weighting and time requirements of other sequences . As we have seen , spin echo imaging techniques directly acquire a ...
... echo . Spin echo sequences are still the most commonly used sequences and serve as a reference to describe the image weighting and time requirements of other sequences . As we have seen , spin echo imaging techniques directly acquire a ...
Page 255
... echo amplitude . Carr and Purcell67 examined the case of diffusion in a constant linear gradient , G , using a sequence as shown in Fig . 7-21 . They showed that the additional signal decay of a single echo caused by diffusion at time ...
... echo amplitude . Carr and Purcell67 examined the case of diffusion in a constant linear gradient , G , using a sequence as shown in Fig . 7-21 . They showed that the additional signal decay of a single echo caused by diffusion at time ...
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