| Objective This study is aimed at measuring the intervertebral height index (IHI), intervertebral angle (IVA) in every lumbar segment and lumbar lordosis (LL) in normal imaging population, and analyzing its characteristics. Methods Collecting out patients from Jan 2014 to Oct 2016 in Xijing hospital department of orthopedics and imaging examination shows no obvious disease and Pfirrmann Scale changes (P-c) were less than or equal to II grade. A total of 303 people had been divided into five groups according to age: young group (20-29 years old); young and middle aged group (30-39 years old); middle aged group (40-49 years old); middle aged and aged group (50-59 years old) ; aged group (over 60 years). Using Surgimap software to get the following parameters in lateral radiographs: IHI, IVA in every lumbar segment and LL. Analyzing the changes of IHI, IVA and LL in different age, gender and P-c groups. Results The IHI is gradually increased from L1-2 to L5-S1, and it’s statistically significant (P<0.05). L5-S1 segment has reached maximum. Comparing the difference in different age, gender and P-G groups in the same segment, there is difference in IHI, but no statistical significance (P>0.05). The IVA is gradually increased from L1-2 to L5-S1 and it’s statistically significant (P<0.05), L5-S1 segment has reached maximum. Comparing the different age groups, there is significance difference (P<0.05) in IHI at L2-3, L3-4, L4-5 segments and LL, but no statistical significance in L1-2, L5-S1 segment (P>0.05). Conclusion This study got the normal range of IHI, IVA in every lumbar segments and LL in normal imaging population. At no degenerative grade degeneration disc, the lumbar spine IHI remained unchanged and did not vary with age or gender. The changes of IVA and LL in each segment of the lumbar spine varied with age. After entering the middle-aged group, the angle gradually increased with age. |
