ORL
Original Paper
Evaluation of Traumatic Optic Neuropathy in Patients with Optic Canal Fracture Using Diffusion Tensor Magnetic Resonance Imaging: A Preliminary ReportYang Q.-T.a · Fan Y.-P.c · Zou Y.b · Kang Z.b · Hu B.b · Liu X.a · Zhang G.-H.a · Li Y.aDepartments of aOtolaryngology-Head and Neck Surgery and bRadiology, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, and cDepartment of Otolaryngology, Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, China
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Article / Publication Details
Received: April 11, 2011
Accepted: June 22, 2011
Published online: September 22, 2011
Issue release date: November 2011
Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 2
ISSN: 0301-1569 (Print)
eISSN: 1423-0275 (Online)
For additional information: https://www.karger.com/ORL
Abstract
Objective: To investigate the role of diffusion tensor magnetic resonance imaging (DT-MRI) in the evaluation of traumatic optic neuropathy (TON). Methods: Six patients with TON underwent DT-MRI prior to decompression surgery. DTV 2 and Volume One 1.44 software were used to measure the fractional anisotropy (FA) and the mean apparent diffusion coefficient (ADC) of the optic nerves. White matter fiber bundle tracking was used to display optic nerves. Results: Visual acuity was improved in 1 of the 6 patients after surgery. The mean FA of the injured eye declined significantly with regard to that of the normal eye (0.2438 ± 0.0670 vs. 0.4524 ± 0.0531; t = 8. 711; p = 0. 000). The mean ADC on the injured side increased significantly compared with that on the normal side [(1.4172 ± 0.1208) × 10–3 mm2/s vs. (1.0866 ± 0.1179) × 10–3 mm2/s; t = –5.316; p = 0. 003). The continuity of the intracanalicular segment of the optic nerve was interrupted in 3 patients without improved postoperative visual acuity. In 1 patient with improved postoperative visual acuity, the fiber bundle of the optic nerve was somewhat less dense in the injured eye than in the normal eye. Conclusions: DT-MRI provides valuable information for evaluating the fibers of optic nerves in TON.
© 2011 S. Karger AG, Basel
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Article / Publication Details
Received: April 11, 2011
Accepted: June 22, 2011
Published online: September 22, 2011
Issue release date: November 2011
Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 2
ISSN: 0301-1569 (Print)
eISSN: 1423-0275 (Online)
For additional information: https://www.karger.com/ORL
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