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Abstract #2553

Low b-value diffusion weighted imaging to evaluate cerebrospinal fluid dynamics

Toshiaki Taoka1, Shinji Naganawa1, Hisashi Kawai1, Toshiki Nakane1, and Katsutoshi Murata2

1Radiology, Nagoya University, Nagoya, Japan, 2Siemens Japan K.K., Tokyo, Japan

We evaluated the signal intensity of the CSF on low b-value (b=500 s/mm2) diffusion weighted images (DWI) in cases with ventricular dilatation versus controls by a scoring method. Although low b-value DWI cannot quantify the absolute flow speed, it may be possible to evaluate the distribution of altered CSF dynamics within the cranium in the cases of ventricular dilatation. We also evaluated the characteristic signal void findings adjacent to the septum pellucidum in the cases with ventricular dilatation, which was speculated to be due to a standing wave in a thinned septum pellucidum.

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