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Abstract #0351

Diffusion Time Dependence in the Evaluation of Choroid Plexus Cysts

Yutaka Ikenouchi1, Tomoko Maekawa1,2, Masaaki Hori1, Katsutoshi Murata3, Thorsten Feiweiwer4, Christina Andica 1, Shohei Fujita1,2, Ryusuke Irie1,2, Akifumi Hagiwara1,2, Kouhei Kamiya1,2, Akihiko Wada1, and Shigeki Aoki1

1Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan, 2Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, 3Siemens Healthcare Japan KK, Tokyo, Japan, 4Siemens Healthcare GmbH, Erlangen, Germany

To obtain information regarding the internal structure of choroid plexus cysts (CPCs) that appear hyperintense on DWI, we investigated the ADC values acquired with a shorter diffusion time using an oscillating gradient spin-echo (OGSE). The ADC values for twenty-seven patients with CPCs were measured with effective diffusion time (Δeff) of 6.5 and 35.2 ms. The ADC values of CPCs were significantly higher at the Δeff of 6.5 ms than with Δeff of 35.2 ms. The dependence of ADC values on the diffusion time in CPCs suggested spatially restricted diffusion.

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