DECT虚拟去骨图CT值测量对脊柱急性骨髓损伤的诊断价值

The Diagnostic Value of CT Attenuation Measurement of Acute Bone Marrow Lesions of the Spine in Dual-Energy CT Virtual Noncalcium Imaging

目的探讨双能CT(DECT)虚拟去骨(VNC)图中CT值测量在脊柱急性骨髓损伤中的诊断价值。方法对急性胸腰椎外伤的患者分别行MR及DECT成像,以MRI作为参考标准,DECT数据经双能去骨后处理得到显示骨髓信息的VNC图,分别测量VNC图中骨髓正常区域和损伤区域的CT值,采用单因素方差分析法进行统计分析,比较骨髓正常区域与骨髓损伤区域的CT值是否存在差异,并与MR进行对照。结果 DECT虚拟去骨图中,急性骨髓损伤区域的CT值比骨髓正常区域的CT值明显升高,且差异具有统计学意义(P<0.05),与DECT伪彩图和MRI具有较高的一致性。腰椎骨髓损伤区域与胸椎骨髓损伤区域的CT值差别无统计学意义(P>0.05)。结论结合DECT伪彩图,DECT VNC图中骨髓CT值的测量对急性骨髓损伤的诊断具有一定定性诊断价值。

Objective To evaluate the diagnostic value of CT values measured in acute bone marrow lesions of spine with Dual-energy CT（ DECT） virtual noncalcium（ VNC） imaging. Methods Patients with acute vertebral bone marrow lesions underwent both MRI and DECT. MR images served as the reference standard. The CT values were postprocessed for generating VNC imaging so that it could be used to display the bone marrow. CT attenuation values of normal and injured region were obtained in VNC imaging. And then evaluated the difference of CT values between them,using oneway ANOVA statistical analysis,compared to MRI. Results There was statistical significance in CT number of injured marrow areas which were higher than the normal regions dramatically. Agreement was substantial for qualitative grading of DECT color-coded maps and MR imaging. There was no statistical significance in CT number of injured bone marrow between the thoracic and lumbar（ P〈0. 05）. Conclusion Conclusion color-coded maps,CT attenuation measurement in dual-energy CT virtual noncalcium imaging has certain qualitative diagnostic value for acute bone marrow lesions of the spine.