The Evaluation of ROC Curve in Qualitative and Quantitative Analysis of Pancreatic Diseases on Fat Saturation FSPGR Sequence
- VernacularTitle:脂肪抑制FSPGR序列:胰腺病变定量和定性分析的ROC曲线评价
- Author:
Qingshi ZENG
;
Chuanfu LI
;
Xiangshui MENG
;
Yi CUI
;
Xunhe ZHANG
- Publication Type:Journal Article
- Keywords:
MRI;
pulse sequence;
pancreas;
signal intensity
- From:
Journal of Practical Radiology
2001;0(07):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the accuracy of fatsuppressed fast spoiled gradient echo(FSPGR) T_1WI in detection of pancreaticdisease using the receiver operating characteristic curve(ROC).Methods The pancreas were evaluated in 92 subject investigated(57normal and 35 with pancreatic disease) with fat saturation FSPGR T_1WI.The signal intensity(SI) ratio of pancreas relative to liver and spleen was quantitatively measured using regions of interest(ROIs),then qualitatively assessed by one independent observers.Results The mean values of pancreas-liver ratios and pancreas-spleen ratios between a normal and an abnormal pancreas were significantlydifferent.Thearea under ROC curve of the pancreas-liver SI ratio and the pancreas-spleen SI ratio was 0.92?0.03 and 0.91?0.04,respectively.There was no statistically significant difference between quantitative and qualitative analysis for the diagnosis of pancreatic disease when using liver as comparable standard.The sensitivity of qualitative pancreas in comparison with liver was 86.7%,while specificity was 91.2%.Conclusion When the SI ratio of pancreas-liver is used to distinguish normal from abnormal pancreas,qualitative analysis by observers is as accuracy as quantitative measurement.
