The clinical applications of echo planar imaging in neuroradiology.
Ultra high speed echo-planar imaging gives an imaging time typically of the order of a few minutes, facilitating throughput, improving patient tolerance and allowing real time dynamic studies. A complete two dimensional image may be acquired in a single shot lasting between 64 and 128 ms. In echo planar imaging the whole of k-space is sampled as a continuous trajectory. By a rapidly switched Gy frequency encoding gradient, a train of gradient echoes is formed, each corresponding to a line in the k plane. Variable degrees at T2- or T1-weighting can be produced by methods outlined. High quality 128 x 128 transverse axial inversion recovery images of 5-10 mm thickness are obtained in 128 ms plus the inversion time.
Worthington
B S
BS
Department of Physics, University of Nottingham, England.
Mansfield
P
P
D000328:Adult; D001921:Brain / Q000473:pathology*; D001932:Brain Neoplasms / Q000175:diagnosis; D002493:Central Nervous System Diseases / Q000175:diagnosis*; D002524:Cerebellar Ataxia / Q000175:diagnosis; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male