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.

Aug 19, 2023 · MRI protocol for stroke assessment is a group of MRI sequences put together to best approach brain ischemia.

Mar 25, 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 ...

Feb 27, 2025 · Significant hemorrhagic transformation of a cerebral infarct usually manifests in a rapid and often profound deterioration in clinical state. In untreated patients, hemorrhagic transformation rarely occurs in the first 6 hours.

Detection of different patterns of contrast enhancement can help in determining the age of infarct. There are two patterns of MR contrast enhancement in the acute phase of ischemic stroke-intravascular enhancement and cortical enhancement.

Jan 21, 2025 · Watershed cerebral infarctions, also known as border zone infarcts, occur at the border between cerebral vascular territories where the tissue is furthest from arterial supply and thus most vulnerable to reductions in perfusion.

Hypertensive diabetic middle aged male with acute onset right ptosis, left facial palsy and left pronator drift. Brainstem infarct?

The mass effect also occurs in ischemic stroke and peaks at 3-5 days and gradually abates. Therefore, a fairly unique feature in subacute infarct is that it enhances but creates little mass effect. Further MRI sequences i.e DWI and ADC are helpful in hyperacute ischemic stroke.

Subacute cerebral infarction is an important differential to always consider and depending on the timing, the appearances can be quite bizarre and mimic tumor.

Feb 25, 2024 · MRI. less commonly used acutely in most centers, but is the best imaging modality for identifying infarcts (especially using the DWI sequence) ultrasound. carotid Doppler ultrasound in the peri-stroke period to identify patients with carotid stenosis and then select patients who may benefit from endarterectomy