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Magnetic resonance imaging in posterior circulation infarction: impact on diagnosis and management
Abstract:
To compare the diagnostic yield of magnetic resonance imaging (MRI) with computed tomography (CT) in posterior circulation infarction, we used proton MRI with a 0.3 Tesla magnet and a 3rd generation CT scanner in 25 patients. Age-matched controls were compared in a blinded fashion. Seventeen patients (68%) showed relevant pathology on MRI not seen on CT, 11 with normal CT and six with more extensive lesions, chiefly in the brain stem. Evidence of abnormal vertebrobasilar blood flow was seen in 8/25 (32%) of patients, suggested by vascular high intensity signals on MRI. Two tissue and one flow abnormality were seen in the control group. MRI provides additional information concerning infarct site, extent and pathogenesis in posterior circulation infarction.
Insights
Magnetic resonance imaging (MRI) is superior to computed tomography (CT) for diagnosing posterior circulation infarction. MRI detected more pathologies, including brain stem lesions and abnormal blood flow, than CT in patients with posterior circulation infarction.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Posterior circulation infarction presents diagnostic challenges.
- Computed tomography (CT) has limitations in visualizing posterior circulation pathologies.
- Magnetic resonance imaging (MRI) offers advanced visualization techniques.