Figure 4

Summary receiving operating characteristic plot with best-fitting asymmetric curve for standard and low b-value DW-MRI in detecting renal cell carcinoma. Summary receiving operating characteristic (SROC) plot with best-fitting asymmetric curve for (A) standard and (B) low b-value DW-MRI. Each solid red circle represents each study in the meta-analysis. The blue curve is the regression line that summarizes the overall diagnostic accuracy. SROC = summary receiver operating characteristic; AUC = area under the curve; SE(AUC) = standard error of AUC; Q* = an index defined by the point on the SROC curve where the sensitivity and specificity are equal, which is the point closest to the top-left corner of the ROC space; SE(Q*) = standard error of Q* index.