Design of Computerized Assessment System for Radius Bone Age Grades according to CHN05

Based on the CHN05 and the bone age images in DICOM format,this paper designs and implements computerized assessment system for radius bone age grades.Firstly,the system automatically preprocess the digital X-ray image of the hand and wrist,secondly,the system propose a radius segmentation algorithm based on region growth method integrated with OTSU method,thirdly the system select partial representative gray feature and texture feature and propose fusion rate as a new feature at first,which is used the parameter of bone age feature,and then a classification experiment for radius grade was implemented with K Nearest Neighbor classifier,a radius rating system platform is established based on ITK、VTK and MFC and implements to rate radius from 80 grade to 84 grade.The results show that the average accuracy of the system is 85.2%,the system is characterized by the scalability,usability and automatic measurement,this paper enrich the computer application research of bone age evaluation system.