Fig. 2From: Critical causes in severe bleeding requiring angioembolization after percutaneous nephrolithotomyExample of a CT scan of a correct (a) and incorrect (b) puncture. Solid line represents the frontal plane, and dotted line represents the line 20 degrees posterior to the frontal plane. In the CT scan of correct puncture (a), the tract is punctured within Brödel’s line. In the CT scan of incorrect puncture (b), the tract is punctured outside of Brödel’s lineBack to article page