ADC map
Also written as: ADC — Apparent Diffusion Coefficient
Apparent diffusion coefficient map, a quantitative image showing water diffusion rates in brain tissue.
Full Definition
An apparent diffusion coefficient (ADC) map is a parametric image derived from diffusion-weighted imaging that quantifies the rate of water diffusion in tissues. Lower ADC values typically indicate restricted diffusion due to cellular swelling, membrane disruption, or increased cellularity. Higher values suggest increased diffusion from tissue damage or edema. ADC maps are essential for distinguishing between cytotoxic and vasogenic edema and are particularly useful in stroke imaging and tumor characterization.
Usage
Usage note: Always specify 'map' when referring to the image; ADC alone may refer to the measurement value
In Context
- "The ADC map revealed hypointense regions corresponding to acute ischemic changes in the middle cerebral artery territory." — Stroke assessment report
- "Quantitative analysis of the ADC map showed significantly reduced values in the tumor core compared to surrounding tissue." — Neuro-oncology research paper