A new scoring system based on lumbar MRI image to assess bone mineral density
10.3760/cma.j.cn431274-20210729-00820
- VernacularTitle:基于腰椎MRI影像评估骨密度的新型评分方法
- Author:
Pingchuan WANG
1
;
Junwu WANG
;
Pengzhi SHI
;
Lei ZHU
;
Liang ZHANG
;
Xinmin FENG
Author Information
1. 扬州大学医学院，扬州 225001
- Keywords:
Magnetic resonance imaging;
Lumbar vertebrae;
Bone density;
Osteoporosis
- From:
Journal of Chinese Physician
2022;24(5):667-671
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To establish a scoring system based on lumbar magnetic resonance imaging (MRI) images to evaluate bone mineral density and evaluate its correlation with T score of dual energy X-ray absorptiometry (DEXA).Methods:The clinical data of 82 patients with lumbar degenerative diseases who were admitted to the Clinical Medical College of Yangzhou University from January 2019 to August 2020 were analyzed retrospectively. According to the lower value of T value of femoral neck and total hip bone mineral density detected by DEXA, they were divided into normal bone mass group ( n=40) and abnormal bone mass group ( n=42). The vertebral body bone mass (VBQ) score of the patient was calculated by dividing the average signal intensity of L 1-4 vertebral body by the signal intensity of L 3 level cerebrospinal fluid on T 1 weighted image of MRI. The receiver operating characteristic (ROC) curve was drawn to evaluate the ability of VBQ score to distinguish between normal bone mass and abnormal bone mass and the accuracy of predicting the occurrence of abnormal bone mass. Further, the correlation between VBQ score and T value was determined by regression analysis. Results:The lowest T value measured by DEXA in the abnormal bone mass group were significantly lower than those in the normal bone mass group, and the VBQ score was significantly higher than that in the normal bone mass group(all P<0.001). The area under curve (AUC) of VBQ score for predicting abnormal bone mass was 0.93, the cut-off value was 2.98, with sensitivity 81.6%, and specificity 88.6%. The VBQ score was corrected with the lowest T value measured by DEXA ( r=-0.77). Conclusions:VBQ score could effectively distinguish normal bone mass from abnormal bone mass and was negatively correlated with the lowest T value of DEXA.
