多层螺旋CT和MRI在额骨内板增生症诊断中的应用价值

目的:探讨多排螺旋CT和MRI在中老年女性额骨内板增生症（HFI）中应用的价值。方法:回顾性分析102例中老年女性（45～97岁，平均年龄67.66±11.95岁）头部多排螺旋CT和MRI图像，应用VR后处理图像评价HFI类型，以CT和MRI矢状位、CT斜矢状位图像测量额骨内板厚度，分析CT和MR测量额骨内板厚度的差异，分析年龄、额骨内板厚度与HFI的关系。结果:中年组（45～59岁，平均年龄52.97±4.43岁）、老年组（60～97岁，平均年龄73.49±8.45岁）分别29例和73例，中年组、老年组患者HFI患病率分别为41.38%和56.16%，两组无统计学差异。患病组中，中年组、老年组重度HFI患病率分别为41.67%和56.10%，两组无统计学差异。CT矢状位、CT斜矢状位测量额骨内板厚度无统计学差异，CT矢状位、MR矢状位测量额骨内板厚度无统计学差异。中年组、老年组，两组患者额骨内板厚度无统计学差异。患病组额骨内板厚度大于非患病组。回归分析，中老年女性人群，年龄与额骨内板厚度，两者不存在线性关系。结论:多排螺旋CT和MRI可以显示、测量额骨内板厚度，VR后处理重建技术可以直观反映额骨内表面，利于额骨内板增生症的诊断及分型。 

Application Value of Multi-detector CT and MRI in the Diagnosis of Hyperostosis Frontalis Interna

Objective: To explore the application value of multi-detector CT and MRI in the diagnosis of middle-aged and senior females with hyperostosis frontalis interna (HFI). Methods: We performed retrospective analysis on the multi-detector CT and MRI images of the head of 102 middle-aged and senior females whose age ranged from 45 years old to 97 years old with the average age of 67.66±11.95 years old. VR post-processing images were used to evaluate the types of HFI while the thickness of the frontal internal plate was measured by CT, MRI sagittal and CT oblique sagittal images. We not only analyzed the difference between the thickness of the inner frontal plate measured respectively by CT and MR, but also explored the relationship among the age, thickness of the inner frontal plate and types of hyperostosis frontalis interna. Results: There were 29 cases in the middle-aged group whose age ranged from 45 years old to 59 years old with the average age of 52.97±4.43 years old and there were 73 cases in the senior group whose age ranged from 60 years old to 97 years old with the average age of 73.49±8.45 years old. The prevalence of HFI was respectively 41.38% in the middle-aged group and 56.16% in the senior group. There was no statistical difference between the two groups. In the HFI group, the prevalence of severe HFI was respectively 41.67% in the middle-aged group and 56.10% in the senior group. There was no statistical difference between the two groups. There was no statistical difference between CT sagittal and CT oblique sagittal measurements of frontal internal plate thickness, and there was no statistical difference between CT sagittal and MR sagittal measurements of frontal internal plate thickness. There was no significant difference in the thickness of the inner frontal plate between the middle-aged group and the senior group. The thickness of the inner frontal plate in the HFI group was greater than that in the non-HFI group. Regression analysis showed that there was no linear relationship between age and frontal plate thickness in middle-aged and senior females. Conclusion: The multi-detector CT and MRI can visualize and measure the thickness of the frontal bone internal plate, and VR post-processing images can visually reflect the internal surface of the frontal bone, which is beneficial for the diagnosis and classification of hyperostosis frontalis interna.