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| Analysis of physiological pit in medial orbital wall with CT |
| LI Shan |
Department of Radiology, Traditional Chinese Medicine Hospital of China Three Gorges University,
Yichang Hospital of Traditional Chinese Medicine, Yichang Hubei 443003, China |
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Abstract Objective: To analyze CT findings of physiological pit in medial orbital wall. Methods: Twenty-one cases with physiological pit in medial orbital wall were included and classified according to the features of axial CT images. Related parameters were measured. Results: According to axial CT image features, the cases were divided into 3 categories: arc sunken pit(15 cases), angle sunken pit(4 cases) and irregular sunken pit(2 cases). Related parameters: ①Depth of the sunken pit: minimum depth 2.1 mm, maximum depth 6.4 mm, average depth (4.0±1.4） mm. ②Length of the sunken pit: minimum length 5.1 mm, maximum length 19.7 mm, average length (13.3±3.7) mm. ③Position of the apex of a sunken pit, on axial CT image: middle 1/3 of lamina was the most common, back 1/3 was the second, front 1/3 was the least; on coronal CT image: the upper half of lamina orbital was the most common, the lower half was the least. Conclusion: 2.6% of the people have physiological pit in the medial orbital wall. The understanding of this phenomenon can improve the identification ability of physiological sunken pit and fracture.
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Received: 07 September 2017
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