Diffusion Sequence

**Semantic type:** Spatial Concept

**Definition:** T2 weighted sequences, sensitized to diffusion by gradients. A sequence is a configuration of radiofrequency pulses and gradients that result in images with a particular appearance. T2 sequences without modification indicate fluid as white, muscle as gray, fat as white, gray matter as gray and white matter is darkish compared to gray matter.

**Synonyms:** - Diffusion sequence - Diffusion-Weighted Imaging Sequence