perfusion-weighted imaging


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perfusion-weighted imaging

Imaging An MRI that provides metabolic and hemodynamic data of the brain in the first few hrs post-stroke, based on the movement of perfused contrast material. See Magnetic resonance imaging. Cf Diffusion-weighted imaging.
References in periodicals archive ?
Combined spin-and gradient-echo perfusion-weighted imaging.
Endpoints will include infarct growth measured by echo-planar imaging capability for performance of MRI; gradient recalled echo (GRE), diffusion-weighted imaging (DWI) / apparent diffusion coefficient (ADC), perfusion-weighted imaging (PWI), fluid-attenuated inversion-recovery (FLAIR), and intracranial MRA.
sup][1] When used together, perfusion-weighted imaging (PWI) and DWI can identify brain tissue with hypoperfusion, which is defined as "ischemic penumbra," from normal diffusion.
Enrolled patients underwent an MRI, with diffusion-weighted and perfusion-weighted imaging sequences.
Perfusion-weighted imaging allows the measurement of capillary perfusion of the brain.
Influence of arterial input function on hypoperfusion volumes measured with perfusion-weighted imaging.
Perfusion-weighted imaging, a companion magnetic resonance technique, images actual blood flow through brain vasculature.
The combination of diffusion-weighted imaging and perfusion-weighted imaging provides a way to distinguish between the area of hypoperfusion as measured by perfusion-weighted imaging and actual infarct size shown in diffusion-weighted imaging.
sup][1] Magnetic resonance (MR) perfusion-weighted imaging (PWI) is a technique to quantitatively evaluate tumor microenvironments by measuring cerebral blood volume (CBV).