Comparison Of The Value Of X-ray And X-ray With CT On Diagnosing Malignant Or Benign Nature Of Bone Tumors Using ROC Curves

PURPOSETo compare the diagnostic value of X - ray and X - ray with CT as two methods on diagnosing malignant or benign nature of bone tumors Using ROC curves.MATERIALS AND METHODS46 patients with bone tumors were selected to undergo X - ray and CT scanning , follow - up continued until all of patients have malignant or benign diagnosis. All of X - ray and CT image are clear and dont have apparent constructed defect and include whole diseased region.All of selected images are divided as two sets of X - ray and CT. First, Two radiologists read all of X - ray images and answer the questions about malignant or benign nature of bone tumors in written form. A week later, two of them read all of X - ray and CT images and answer the questions about malignant or the benign nature of bone tumors in written form.The content of questions include five grades of malignant, doubtful malignant , N/K, doubtful benign, benign. Hie standard of judgment is the following : A. malignant: infiltrated osteoclasia; periosteal proliferation or ruined peri-osteal proliferation; infiltrate soft issue and product tumor. B. Benign; dilated osteoclasia; dont have or have few periosteal proliferation and be not ruined; dont have soft issue tumor or have tumor with clear bouncary.ROC curves were made with ROCKIT software. ROC curve diagram was...