Preliminary Findings on Non-contrast Enhanced Positive Endolymph Images: Limited Delineation of Endolymphatic Space.

A recently proposed non-contrast MRI technique for evaluating endolymphatic hydrops employs inversion recovery without T2-preparation and the subtraction of 2 inversion time images. However, our high-resolution non-contrast positive endolymph images (PEI) reveal inconsistencies in delineating the endolymphatic space, challenging this method's reliability. Comprehensive analysis is required to address the interplay among signal intensity, T1 relaxation times, and inversion efficiency within endolymphatic and perilymphatic spaces to establish its diagnostic accuracy.