Functional Brain Imaging |
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Page 267
P2 of a tissue mixing volume , the concentration - time curve measured at the
venous outflow provides a record of the distribution of transit times through the
tissue . As indicated in Fig . 7-35 , the curve is not sharp and is extended over
time .
P2 of a tissue mixing volume , the concentration - time curve measured at the
venous outflow provides a record of the distribution of transit times through the
tissue . As indicated in Fig . 7-35 , the curve is not sharp and is extended over
time .
Page 270
The total tissue blood volume is the sum over all the volumes contributed by
paths of different lengths : is 1 minus all of the fractions that have left since the
injection and up to time t , H ( t ) : co Vi = Fif th ( t ) dt ( 7-32 ) R ( t ) = 1 - sh ( t ) dt 1
- H ( t ) ...
The total tissue blood volume is the sum over all the volumes contributed by
paths of different lengths : is 1 minus all of the fractions that have left since the
injection and up to time t , H ( t ) : co Vi = Fif th ( t ) dt ( 7-32 ) R ( t ) = 1 - sh ( t ) dt 1
- H ( t ) ...
Page 271
Therefore , the total measured tissue residue signal over time will be Ssun S ( t )
dt km , R ( t ) dt ( 7-36 ) 0 0 Since dR / dt = -h ( t ) , this equation can be rewritten
as [ suydt = km , fenceydi ( 7-37 ) Incorporating the definition of MTT from
equation ...
Therefore , the total measured tissue residue signal over time will be Ssun S ( t )
dt km , R ( t ) dt ( 7-36 ) 0 0 Since dR / dt = -h ( t ) , this equation can be rewritten
as [ suydt = km , fenceydi ( 7-37 ) Incorporating the definition of MTT from
equation ...
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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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