Perfusion weighted imaging: Difference between revisions
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==MR Perfusion== | |||
Perfusion weighted imaging or MR perfusion is a term used to denote a variety of [[MRI]] techniques able to give insights into the perfusion of tissues by blood. | Perfusion weighted imaging or MR perfusion is a term used to denote a variety of [[MRI]] techniques able to give insights into the perfusion of tissues by blood. | ||
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===Techniques=== | ===Techniques=== | ||
*Dynamic susceptibility contrast imaging (DSC) | |||
*Dynamic contrast enhanced imaging (DCE) | *Dynamic contrast enhanced imaging (DCE) | ||
*Arterial spin labelled imaging (ASL) | *Arterial spin labelled imaging (ASL) | ||
Revision as of 00:51, 2 October 2015
MR Perfusion
Perfusion weighted imaging or MR perfusion is a term used to denote a variety of MRI techniques able to give insights into the perfusion of tissues by blood.
There are three techniques in wide use to derive one or more perfusion values:
===Techniques===
- Dynamic susceptibility contrast imaging (DSC)
- Dynamic contrast enhanced imaging (DCE)
- Arterial spin labelled imaging (ASL)
Derived values
- Time to peak (TTP)
- Mean transit time (MTT)
- Cerebral blood volume (CBV)
- Cerebral blood flow (CBF)
- Negative enhancement integral (NEI)
- K-trans
The main role of perfusion imaging is in evaluation of ischemic conditions (e.g. acute cerebral infarction to determine ischemic penumbra, moya-moya disease to identify vascular reserve) and neoplasms (e.g. identify highest grade component of diffuse astrocytomas, help distinguish glioblastomas form cerebral metastases).