Diffusion weighted imaging and estimation of prognosis using apparent diffusion coefficient measurements in ischemic...

Area of Science:

• Neuroimaging
• Radiology
• Stroke Medicine

Background:

• Acute stroke diagnosis relies on Magnetic Resonance Imaging (MRI).
• Diffusion Weighted Imaging (DWI) and apparent diffusion coefficient (ADC) mapping are crucial for assessing ischemic stroke.
• Prognosticating stroke outcomes aids in treatment planning.

Purpose of the Study:

• To estimate the prognosis of infarction using Diffusion Weighted Imaging (DWI) and quantitative apparent diffusion coefficient (ADC) measurements.
• To evaluate the utility of ADC values in differentiating between infarction expansion and stability.
• To correlate ADC values with infarction volume changes over time.

Main Methods:

• 23 patients with acute stroke symptoms and confirmed infarction via MRI were studied.
• MRI scans were performed 6-12 hours post-symptom onset and repeated on day 5.
• Infarction volumes were calculated using DWI; patients were grouped based on infarction area expansion.

Main Results:

• ADC values in the ischemic penumbra (ADC(P)) showed a highly significant difference between groups with and without infarction expansion (p<0.001).
• Significant differences were found when comparing ADC(P) to ADC(IC) (p=0.038) and ADC(N) (p<0.001).
• No significant differences were observed between mean ADC(IC) and ADC(N) values.

Conclusions:

• ADC measurements from the infarction core and penumbra are valuable for estimating prognosis.
• These quantitative ADC values can guide the planning of treatment protocols for acute stroke.
• ADC mapping offers a promising tool for personalized stroke management.