In the diagnostic radiology profession, computed tomography (CT) scanning has become the industry standard for stroke. However, according to findings reported in 2010 by the American Academy of Neurology, magnetic resonance imaging (MRI) may be more effective at identifying brain damage. One particular study showed that MRIs detected stroke accurately in 83 percent of cases, whereas CT scans only offered 26 percent accuracy.
The published guidelines specify the use of diffusion-weighted imaging (DWI) technology, which measures the movement of water through tissue. This helps diagnosticians to identify tissue changes related to ischemic stroke, often as soon as minutes after the event.
The academy does recognize that there can be practical obstacles to the use of MRI in a clinical setting. Recommendations suggest the use of immediate CT scanning over waiting for an MRI machine whenever time is of the essence, while simultaneously urging physicians to conduct MRI testing when possible to maximize available information.