Research Of Bone Mineral Density Measurement By Quantitative Computed Tomography And Dual-energy X-ray Absorptiometry In Patients With Lumbar Disc Herniation

Objective: To compare the bone mineral density in patients with lumbar disc herniation and the normal, and to study the influence of lumbar disc herniation on bone mineral density and the correlation of measuring BMD between quantitative computed tomography and dual-energy X-ray absorptiometry, the aim of this research was to study the change of bone mineral density in patients with lumbar disc herniation, and to provide the basis for clinical choice of bone density measurement.Methods:Collection of50patients of lumbar disc herniation and50healthy volunteers, the first all of them were measured the bone mineral density of the lumbar vertebrae with QCT, and then using dual-energy X-ray absorptiometry to measure bone density of lumbar vertebrae and left hip of the case group and the control group, all of the datas with two methods of measurement the bone mineral density were for statistical analysis respectively. At the same time50patients with lumbar disc herniation were measured bone density by DXA and QCT. All of the data was for statistical correlation analysis.Results:①Using QCT to measure the bone mineral density,the bone mineral density has no significant difference between the lumbar disc herniation patients and the normals.(P>0.05)②Using DXA to measure the bone mineral density, the bone mineral density has no significant difference between the lumbar disc herniation patients and the normals.(P>0.05)③50patients with lumbar disc herniation were measured bone density by DXA and QCT, bone mineral density of lumbar vertebrae measured by DXA was correlative (r=0.832,P<0.05) with QCT in the females older than50-year-old.Conclusion:1、By using the quantitative computed tomography and dual-energy X-ray absorptiometry to measure bone density of patients of lumbar disc herniation and healthy volunteers, the bone mineral density of lumbar disc herniation patients has not seen significantly reduced. Lumbar disc herniation has not influence the bone mineral density.2、For the X-ray level of DXA is low, the accuracy of DXA is good and the price is inexpensive, especially in the females older than50-year-old, bone mineral density of lumbar vertebrae examined by DXA is correlative with QCT, so DXA has a high practical value in the postmenopausal women of lumbar disc herniation.