Preoperative Planning with Noncontrast Computed Tomography in the Prone and Supine Position for Percutaneous Nephrolithotomy: A Practical Overview

Supine NCCT is not accurate to plan PCNL access in prone position. Prone decubitus is associated with more potential organ injuries in the upper pole. In supine, the kidney situates deeper in the abdomen but the access angle is wider than in prone.