Optimal window width and center level settings in 256-slice spiral CT diagnosis of costal cartilage fracture
- VernacularTitle:256层螺旋CT诊断肋软骨骨折:窗宽、窗位优化分析
- Author:
Wenxu QI
;
Shinong PAN
;
Qiyong GUO
;
Wenli GUO
;
Xiaomei LU
- Publication Type:Journal Article
- Keywords:
Tomography,X-ray computed;
Costal cartilage;
Fracture;
Window width;
Window level
- From:
Chinese Journal of Medical Imaging Technology
2010;26(2):355-357
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the optimal window level and center level settings in the diagnosis of costal cartilage fracture with 256-slice spiral CT through ROC analysis. Methods Thirty patients with suspected costal cartilage fractures underwent 256-slices chest spirals CT scaning. CT value of costal cartilage was measured by three experienced radiologists. The soft copy images of three kinds of window level and window width (-100 HU/1120 HU, 100 HU/1120 HU, 300 HU/1120 HU) were analyzed independently in PACS with dual-blind method, and the diagnosis results were taken ROC analysis with SPSS 16.0 software. The diagnostic accuracy of three physicians were evaluated and compared according to the area under the ROC curve (Az). Results A total of 8 patients of costal cartilage fractures were confirmed by CT diagnosis combined with clinical follow-up. The mean CT value of 30 patients was (98.78±32.86) HU. The area under the ROC curve with the window level and center level settings of (100 HU/1120 HU) were bigger than that of other window level and window width (P=0.045,P=0.002). Kappa identity test showed that there was a powerful conformability between the diagnostic results of three physicians. Conclusion 256-slice spiral CT is a good way for the diagnosis of costal cartilage fractures with suitable window level and center level settings.
