Abstract #0746

The Impact of Acceleration on Radiologists' Confidence in Point-Of-Care 0.5T MRI For Triage of Acute Stroke

Michelle Pryde^1,2, Sarah Reeve^2,3, Taylor Bouchie^2,4, Elena Adela Cora^5,6, David Volders^5,6, Chris Bowen^2,3,5, James Rioux^2,3,5, and Steven Beyea^1,2,3,5

¹School of Biomedical Engineering, Dalhousie University, Halifax, NS, Canada, ²Biomedical Translational Imaging Centre, QEII Health Sciences Centre, Halifax, NS, Canada, ³Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada, ⁴Medicine, Dalhousie University, Halifax, NS, Canada, ⁵Diagnostic Radiology, Dalhousie University, Halifax, NS, Canada, ⁶Diagnostic Imaging, Nova Scotia Health, Halifax, NS, Canada

Accelerated MR image acquisition is key for emergency medicine situations, such as acute stroke, but yields degraded image quality. Therefore, our aim in this study was to calibrate a relationship between IQMs and radiologists' confidence in answering pointed clinical questions relevant to triaging of stroke patients so as to develop a protocol at low-field that is “as fast as clinically useful”. We observed that upon increasing R and decreasing NEX, radiologists’ confidence scores in their ability to identify diagnostically relevant features of both acute and chronic stroke decreased; however, radiologists’ confidence remained high despite retrospective acceleration of up to R=6.

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