## Functional Brain Imaging |

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Page 267

P2 of a

venous outflow provides a record of the distribution of transit times through the

time .

P2 of a

**tissue**mixing volume , the concentration - time curve measured at thevenous 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 overtime .

Page 270

The total

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 bypaths 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

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 | |

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

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