Intermediate
Technical
In the Industry Vocabulary Test
perfusion-weighted imaging
MRI technique that measures cerebral blood flow and blood volume to assess tissue perfusion and vascular function.
Full Definition
Perfusion-weighted imaging (PWI) is an MRI technique that evaluates cerebral blood flow, blood volume, and perfusion parameters by tracking the passage of contrast agents or using arterial spin labeling methods. PWI provides information about tissue viability, vascular function, and hemodynamic status, making it valuable for stroke assessment, tumor evaluation, and neurovascular research. The technique can distinguish between reversibly and irreversibly damaged tissue in acute conditions.
Usage
Usage note: Hyphenate consistently; often abbreviated as PWI in subsequent references within documents.
In Context
- "Perfusion-weighted imaging revealed reduced blood flow in the affected territory despite normal structural appearance." — Stroke assessment report
- "The research protocol included perfusion-weighted imaging to evaluate treatment effects on cerebral blood flow." — Clinical trial methodology
Also known as
PWI
cerebral perfusion imaging
Don't confuse with
diffusion-weighted imaging
susceptibility-weighted imaging