MR Imaging Characteristics of Intraocular Perfluoro-n-Octane

Axial T1-weighted (A), axial fat-suppressed T2-weighted (B), axial STIR (C), and sagittal T1-weighted (D) MR imaging of the orbits demonstrate hypointense PFO layering dependently within the posterior segment of the left globe (arrowheads) with fluid–fluid level (arrows). Note that the attenuation of PFO is greater than that of water, causing it to layer dependently within the left globe in this supine patient.