
Diffusion-weighted imaging in acute ischemic stroke
Jan 17, 2025 · Diffusion-weighted imaging (DWI) is a commonly performed MRI sequence for the evaluation of acute ischemic stroke and is very sensitive in the detection of small and early infarcts. Conventional MRI sequences (T1WI, T2WI) may not demonstrate an infarct for 6 hours, and small infarcts may be hard to appreciate on CT for days, especially without ...
Apparent diffusion coefficient | Radiology Reference Article ...
Jan 6, 2025 · Apparent diffusion coefficient (ADC) is a measure of the magnitude of diffusion (of water molecules) within tissue, and is commonly clinically calculated using MRI with diffusion-weighted imaging (DWI) 1.
Ischemic stroke | Radiology Reference Article - Radiopaedia.org
Mar 2, 2025 · Aging ischemic strokes can be important in a number of clinical and medicolegal settings. Both CT and MRI can help in determining when a stroke occurred as imaging features evolve in a reasonably predictable fashion. There is substantial heterogeneity in the terminology denoting time from onset.
ADC pseudonormalization | Radiology Reference Article
Aug 7, 2018 · ADC pseudonormalization is a normal phase encountered in the subacute stage of ischemic stroke and represents an apparent return to normal healthy brain values on ADC maps which does not, however, represent true resolution of ischemic damage.
Stroke protocol (MRI) | Radiology Reference Article
Aug 19, 2023 · MRI protocol for stroke assessment is a group of MRI sequences put together to best approach brain ischemia.
Diffusion-weighted imaging | Radiology Reference Article
Mar 20, 2023 · the pulse sequence that results in the generation of the various images (e.g. isotropic map, b=0, ADC) a more general term to encompass all diffusion techniques including diffusion tensor imaging. Additionally, confusion also …
Quick stroke protocol (MRI) | Radiology Reference Article
Mar 23, 2023 · MRI protocol for a quick stroke assessment corresponds to a short protocol, usually just the DWI/ADC, adopted by some institutions as a complementary tool to the CT imaging in stroke code patients. The aim is to provide additional information to support stroke diagnosis within the narrow time window for thrombolytic therapy.
T2 shine through | Radiology Reference Article - Radiopaedia.org
Apr 10, 2022 · ADC is a value that measures the effect of diffusion independent of the influence of T2 shine-through. ADC maps thus portray restricted diffusion , such as in ischemic injury, as hypointense lesions relative to normal brain.
Hyperacute ischemic stroke | Radiology Case - Radiopaedia.org
MRI features of hyperacute ischemic stroke are classically depicted in this patient. Low signal intensity on ADC, hyperintensity on DWI, high signal on T2/FLAIR and isointense signal on T1W sequences are findings pointing to hyperacute ischemic stroke.
Hemorrhagic transformation of ischemic stroke - Radiopaedia.org
Feb 27, 2025 · mri Appearances of MRI are as expected for an ischemic stroke, demonstrating restricted diffusion on DWI / ADC sequences. Sequences susceptible to signal drop out due to blood products (especially SWI ) are useful as they are more sensitive than CT to early hemorrhage and may help direct therapy (e.g. withhold thrombolytic therapy) although ...