Fig. 2From: Assessment of the use of contrast enhanced ultrasound in guiding microdissection testicular sperm extraction in nonobstructive azoospermiaROC curve. PI, TTP and AT were the best predictors of positive sperm retrieval. The two images respectively showed the ROC curves of PI, AUC, PIT, AUCT (a) and TTP, AT (b) in predicting positive sperm retrievalBack to article page