DR图像手动拼接技术在全膝关节置换术中的应用  

Application of Manual Stitching Technique for Digital Radiography in Total Knee Arthroplasty

作　　者：徐亮[1,2] 覃涛[1,2] 

机构地区：[1]湖北省三峡大学人民医院 [2]宜昌市第一人民医院骨科,宜昌443000

出　　处：《华中科技大学学报（医学版）》2014年第4期456-458,475,共4页Acta Medicinae Universitatis Scientiae et Technologiae Huazhong

摘　　要：目的介绍利用简易手段获得下肢全景X线片的方法及消除拼接误差的处理,并用于全膝关节置换术(TKA)中的力线测量。方法预先设定需要X线球管曝光轨迹,使用DR X线机采集Dicom格式图像数据,将图像数据导入Photoshop CS4中进行手动配准及图像融合。最后比较患者体表标志连线在冠状面上的投影之间的垂直长度和全长片在AutoCAD 2010上的垂直长度。并对患者术前、术后髋-膝-踝角(hip-knee-ankle angle,HKA)进行比较。结果对4组术前、术后大转子至腓骨头,腓骨头至外踝长度数据采用配对样本t检验进行比较,差异无统计学意义(均P>0.05)。术后组HKA明显大于术前组(P<0.05)。结论该方法能够制作精确、无缝的全长X线片,能真实地反映术前术后下肢全长的长度及角度信息。Objective To obtain panorama X-ray images of the lower extremity with a simple method,eliminate the mosaicing error,and apply this manual stitching technique for digital radiography to the measurement of the force line in total knee arthroplasty.Methods The track of X-ray tube was preset,and Dicom format data were collected by using digital X-ray imaging.Then,the data were imported to photoshop CS4 for manual image registration and image fusion.The reliability of the film was tested by comparing the vertical length of the body symbols projection in the coronal plane with that on the panorama X-ray（AutoCAD 2010）images.Moreover,the hip-knee-ankle angle was compared before and after operation.Results The matching sample t-test showed there were no significant differences in the length（4groups of data）between the greater trochanter femur and the fibular head,and between the fibular head and the lateral malleolus between before and after operation（P〉0.05 for all）.The hip-knee-ankles angle was much greater after operation than that before operation.Conclusion This manual stitching technique for digital radiography can produce seamless and precise panorama X-ray images,which can be used to reflect the length and angle of the lower extremity before and after operation.

关 键 词：全膝关节置换 DR图像拼接技术 图像配准 图像融合 

分 类 号：R687.4[医药卫生—骨科学]