Features of imaging of CT with high resolution in fracture of optic canal

Objective To invesitigate the features of imaging of CT with high resolution (HRCT) in fracture of optic canal, and evaluate the clinical application of HRCT. Methods A total of 22 patients with facture of optic canal underwent thin layer (1.5 mm) CT scanning in axial and coronal positions. The features of the image of fractures of optic canal were analyzed. Results There were 15 cases (68.2%) of fractures in the inner wall, 1 (4.5%) in the lateral wall, 1 (4.5%) in the superior wall, 2 (9.1%)in the inferior wall, and 3 (13.6%) were with the compound fracture. The direct sign of the fracture of optic canal was the osseous successional discontinuity of the wall of optic canal, including 5 types: concave (27.3%), lineal(22.7%), comminuted (27.3%), inlaid(9.1%), and mixed(13.6%) type. The indirect signs were hemorrhage of sphenoidal sinus(95.5%), hemorrhage of ethmoid sinus (50%), and optic-nerve thickening (36.4%), etc. Conclusions HRCT may clearly exhibit the positions and types of the fracture of optic canal, and it can provide reliable information for the clinical diagnosis and selection of manners of the treatment.