Detection of Acute Infarction Using 0.23T Mobile Magnetic Resonance Imaging in Patients with Minor Ischemic Stroke or Transient Ischemic Attack

Motivation: Low-field mobile MRI (0.064T) enables early identification of acute infarction(s) for patients with minor ischemic stroke (MIS) or transient ischemic attack (TIA). Improving the spatial resolution and shortening the scanning time are needed. Goal(s): This study sought to compare the performance of low-field mobile MRI (0.23T) and 3T MRI in detecting acute infarction(s) in MIS or TIA patients within 14 days since onset. Approach: The accuracy was calculated. The ground truth was defined as the closest 3T fixed MRI examination. Results: The accuracy of mobile low-field MRI in detecting acute infarction(s) was 96.1%. Overall scan time was shortend compared to the 0.064T system. Impact: The performance of 0.23T low-field mobile MRI in detecting acute ischemic infarctions was comparable with 3T MRI in our study.