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A new diffusion SSFP imaging technique

✍ Scribed by Yuval Zur; Elyakim Bosak; Noam Kaplan

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
615 KB
Volume
37
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

In this paper a new diffusion sensitive steady‐state free precession (SSFP) pulse sequence with a reduced sensitivity to physiological brain motion is presented. The signal attenuation due to diffusion in this SSFP sequence is derived theoretically and confirmed experimentally with a phantom. It is shown that for brain tissue this signal attenuation is approximately independent of T1 and T2, but depends only on the pulse sequence used, i.e., the timing and the size of the RF and the gradient pulses. On this basis the diffusion constant can be calculated for any region in the image. Diffusion sensitive images of the brain obtained with our pulse sequence are presented and shown to be superior over an image obtained with a “conventional” diffusion sensitive SSFP sequence.

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