Fig. 3From: Applying a statistical method in transvaginal ultrasound training: lessons from the learning curve cumulative summation test (LC-CUSUM) for endometriosis mappingTVUS of a large vaginal nodule extending to the rectosigmoid. The sonographer interpreted this lesion as a rectosigmoid bowel lesion while the surgeon described it as a vaginal lesion. Arrows show extent of lesionBack to article page