Functional Brain Imaging |
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Page 165
frequency yBo . For 1.5 T this carrier will be 63,861,450 Hz . As mentioned above
, this carrier signal frequency offset is removed during data collection . zero point
positioned to be in the center of the homogeneous volume . A field gradient can ...
frequency yBo . For 1.5 T this carrier will be 63,861,450 Hz . As mentioned above
, this carrier signal frequency offset is removed during data collection . zero point
positioned to be in the center of the homogeneous volume . A field gradient can ...
Page 168
An ideal pulse has all frequencies within the bandwidth of the same amplitude
and all of the frequencies beyond the upper and lower limits of zero amplitude . A
nonsquare frequency profile that can be implemented directly leads to a ...
An ideal pulse has all frequencies within the bandwidth of the same amplitude
and all of the frequencies beyond the upper and lower limits of zero amplitude . A
nonsquare frequency profile that can be implemented directly leads to a ...
Page 337
With advancing age beyond 65 , a decrease in alpha frequency can occur ,
although in healthy aged persons , the mean alpha frequency generally remains
above 8 Hz , even at age 100 . Mu Rhythm The alpha rhythm is not the only
rhythm in ...
With advancing age beyond 65 , a decrease in alpha frequency can occur ,
although in healthy aged persons , the mean alpha frequency generally remains
above 8 Hz , even at age 100 . Mu Rhythm The alpha rhythm is not the only
rhythm in ...
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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 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