The relatively long scan times with currently available technology restrict the range of MRI
applications, increase the cost of scanning by limiting throughput, and lead to image artifacts
from patient motion during scans. Ultrafast imaging, in several guises, is now poised for
introduction into clinical practice. With the Instascan method, a descendant of the echo-
planar technique, complete MR images may be obtained hundreds to thousands of times
faster than in conventional approaches and now yield spatial resolution and contrast directly …