Perfusion (regional CBF)
|
Positron emission tomography | 15O labelled water | Allows oxygen consumption measurement |
| | Quantitative |
Xenon based techniques | Stable xenon methods | Potentially quantitative |
| Intravenous xenon methods | |
| Xenon SPECT | |
| Xenon CT | |
MR based techniques | Exogenous perfusion | Using gadolinium bolus |
| Endogenous perfusion | Non-invasive |
CT based techniques | Contrast perfusion imaging | |
| Xenon CT | |
SPECT | 99mTcHMPAO | Semiquantitative |
| 123I labelled IMP | |
Transcranial Duplex ultrasound | Ultrasound perfusion | Quantification not yet possible |
Volume flow (in major arteries)
|
Carotid and vertebral ultrasound | Doppler based techniques | Flow in major arteries and not tissue perfusion |
| Non-Doppler based techniques |
Transcranial Doppler ultrasound | | Velocity rather than flow measurement |