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. 2018 Mar 7;18(1):105–108. doi: 10.2463/mrms.bc.2017-0158

Fig. 1.

Fig. 1

A 77-year-old man with Meniere’s disease of the right ear, with otitis media. (a) Magnetic resonance cisternography shows the entire fluid-filled space of the right inner ear. (b) Positive perilymph image (positive perilymph image [PPI], TR/TE/inversion time [TI]:16,000/544/2900). An area of slightly elevated signal (long arrows) is seen in the center of the vestibule. (c) Positive endolymph image (positive endolymph image [PEI], TR/TE/TI: 16,000/544/2500). An area of slightly elevated signal (long arrows) is seen in the center of the vestibule. (d) Improved HYbriD of Reversed image of Positive endolymph signal and native image of positive perilymph Signal (i-HYDROPS) images are generated by the subtraction of PEI from PPI. Endolymphatic hydrops in the vestibule is not visible, and appears as a gray region (long arrows). This is due to the signal cancelation of endolymph on PPI and PEI resulting from the subtraction. Endolymphatic hydrops (EH) in the cochlea is clearly visualized (arrows). (e) Three-dimensional-real IR image (TR/TE/TI: 16000/538/2700). Endolymphatic hydrops in the cochlea (arrows) appears very similar to i-HYDROPS image. Endolymphatic hydrops in the vestibule can be visualized in this image (long arrows).