ABSTRACT
Objective Based on MRI m-Dixon-Quant technique to quickly quantify bone marrow fat content in the vertebral body of middle-aged and elderly patients,and provide a scientific basis for the diagnosis of osteoporosis(OP).Methods A total of 74 middle-aged and elderly patients who were admitted to our hospital from July 2016 to July 2017 were collected.The age,sex and body mass index (BMI)of the patients were collected.All subjects were evaluated for bone mineral density (BMD)and fat fraction (FF)and other indicators of measurement.According to the guidelines for bone mineral density measurement by the American College of Radiology(ACR),the subject was classified by the bone mineral density value,and receiver operating characteristic(ROC)curve was used for the diagnosis and analysis of FF.Results The average age of the subjects was (59.50±8.72)years.There was a positive correlation between MRI m-Dixon-Quant FF and age(r=0.436),which was highly negatively correlated with the average bone density(r=-0.739).By ROC analysis,the sensitivity and specificity were 74.2% and 83.3% for normal and low bone mass groups,92.0% and 88.9% for the normal and OP groups,and 72.0% and 87.1% for the low bone mass and OP groups.FF could be used for the evaluation of OP.If FF<54.60,normal bone mass was considered.If 54.60≤FF≤65.20,low bone mass was considered,if FF>65.20,OP was considered.Conclusion The MRI m-Dixon-Quant FF index can be rapidly and quantitatively used for the diagnosis of OP,which provides a new reference for the diagnosis of OP.