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- W2383904616 abstract "Objective To determine the normal range of the clival length (CL) and the clival oblique angle (COA) in normal Chinese individuals and patients with Chiari malformation by measuring with MRI.Materials and Methods CL and COA on midsagittal MRI were measured in 317 normal subjects and in 42 patients with Chiari malformation. The normal subjects were divided into 16 groups according to the sex and age, 20 subjects each group with the exception of female group of age over 70 (only 17 subjects). MRI data were obtained with a 1.0T MR scanner, and t test was used as statistical significance test.Results The CL of male Chinese was longer than that of female Chinese, the difference was of statistical significance (P0.05), and it was increasing with age before around 20 years old, then remained stable. The COA was increasing with age before 20 years old and became slightly small in one's third decade, then grew steadily. No significant difference in COA was found between male and female (P0.05). The differences in both COA and CL were statistically significant between the normal group and group of patients (P0.05).Conclusion The CL and COA in Chinese subjects carry their normal ranges and show a certain regular developmental pattern. Developmental abnormalities should be considered when CL is less than 41mm or COA is less than 50° in a Chinese adult. When the lower 0 border of tonsil is located 3mm below the cranial baseline Chiari malformation may be diagnosed." @default.
- W2383904616 created "2016-06-24" @default.
- W2383904616 creator A5077399002 @default.
- W2383904616 date "2001-01-01" @default.
- W2383904616 modified "2023-09-28" @default.
- W2383904616 title "A Clinical Quantitative Study of Clivus in Chinese Individuals with MRI" @default.
- W2383904616 hasPublicationYear "2001" @default.
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