Magnetic resonance imaging (MRI) is a technique using magnets, radio waves, and a computer that produces images of soft tissues in the body, like muscles and organs. Unlike some other imaging tests, ...

Patients with focal neurological signs may be both negative (deficits), as a result of a focal cortical damage secondary to a venous stroke (over 40% of patients; Table 3), or positive, reflecting a ...

From the Department of Radiology, University of California, Los Angeles School of Medicine, Center for the Health Sciences, Los Angeles, California 90024, and the Radiology Service, Walter Reed ...