The Mechanism Causing High-signal Intensity on Diffusion-weighted Imaging in Adnexal Torsion: Two Case Reports

Shinya Fujii; Naoko Mukuda; Kanae Nosaka; Takeru Fukunaga; Chie Inoue; Toshihide Ogawa

doi:10.2463/mrms.cr.2016-0105

Case Reports

The Mechanism Causing High-signal Intensity on Diffusion-weighted Imaging in Adnexal Torsion: Two Case Reports

Shinya Fujii, Naoko Mukuda, Kanae Nosaka, Takeru Fukunaga, Chie Inoue, Toshihide Ogawa

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Keywords: magnetic resonance imaging, diffusion-weighted magnetic resonance imaging, T₂*-weighted imaging, ovary, ovarian

JOURNAL OPEN ACCESS

2017 Volume 16 Issue 3 Pages 262-264

DOI https://doi.org/10.2463/mrms.cr.2016-0105

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Abstract

We report two cases with adnexal torsion to assess the mechanism of very strong signal intensity in ovarian lesions on DW imaging using MR imaging such as T₂*-weighted imaging. MR imaging findings of the cases suggest that the very strong signal intensity on DW imaging is contributed to cytotoxic edema with or without vasogenic edema, as well as oxyhemoglobin or extracellular methemoglobin.

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