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AJNR - American Journal of Neuroradiology

Published ahead of print on September 28, 2007
doi: 10.3174/ajnr.A0710

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Diffusion-Weighted MR Imaging in Posterior Ischemic Optic Neuropathy

Ashish Verma^a, Krishan K. Jain^a, Suvash Mohan^a and Rajendra V. Phadke^a

^a Department of Radiodiagnosis
Sanjay Gandhi Post Graduate Institute of Medical Sciences
Lucknow, India

View larger version (109K): [in this window] [in a new window]   Fig 1. MR imaging shows enhancing mucosal thickening in the left sinonasal complex on coronal postcontrast fat-saturated T1-weighted (A) and axial T2-weighted sequences (B). In addition, the T2-weighted image shows a bulky, enhancing left cavernous sinus with nonvisualization of left ICA flow void (suggesting thrombosis). A 3D time-of-flight MRA (C) shows absence of the left ICA and paucity of the branches of the left distal MCA. Sagittal (D) and axial (E) DW images show restriction in the posterior part of the intraorbital optic nerve (arrow). The ADC map (F) shows reduced ADC in the posterior part (arrow) and increased ADC in the anterior part, respectively.