Susceptibility weighted imaging and cerebrovascular disorders

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Cerebrovascular disorders, particularly ischemic stroke, pose significant health challenges.
• Accurate assessment of stroke severity and prognosis is crucial for effective patient management.
• Susceptibility-weighted imaging (SWI) is an MRI technique sensitive to blood products.

Purpose of the Study:

• To investigate the correlation between SWI findings and the prognosis of cerebrovascular disorders.
• To evaluate the utility of SWI in identifying deoxygenated blood vessels in ischemic stroke patients.

Main Methods:

• Retrospective analysis of 299 ischemic stroke patients from July 2008 to July 2010.
• Detailed examination of 86 patients with pre- and post-treatment CT, MRI with SWI, and angiograms (catheter cerebral angiography, MR/CT angiogram).
• Correlation of SWI findings (hypointense vessels) with diffusion-weighted imaging (DWI) and CT head scans.

Main Results:

• 63 out of 86 patients exhibited abnormal hypointense vessels on SWI, indicating deoxygenated blood.
• 23 patients with negative SWI findings for deoxygenated vessels showed small infarcts on DWI.
• CT findings did not always correlate with the presence of hypointense vessels on SWI, suggesting SWI's complementary role.
• Prominent hypointense vessels on SWI were associated with potentially larger infarcts.

Conclusions:

• SWI is valuable for detecting deoxygenated blood in cerebral vessels, offering insights into ischemic stroke.
• SWI findings, particularly prominent hypointense vessels, may predict a worse prognosis and larger infarct size.
• SWI complements conventional imaging techniques like CT and DWI in evaluating cerebrovascular disorders.