What is the diagnostic value of head MRI after negative head CT in ED patients presenting with symptoms atypical of stroke?
Hammoud et al. (2016) studied the diagnostic value of head MRI after negative head CT in ED patients presenting with symptoms atypical of stroke and found that MRI was able to identify stroke in an additional 7.1% of cases compared to CT alone. Furthermore, MRI was significantly better at detecting small vessel ischemic stroke, which was not detected by CT in any cases.