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Renal ultrasound in PCNL (a) visualisation of the kidney and its surrounding before ureteral catheter insertion. (b) the tip of the ureteral catheter was seen at the opening of inferior calyx. (c) Needle tract was clearly seen piercing through renal parenchyma, into the pelvic calyceal system. (d) Alken metal dilator can clearly be seen through ultrasound imaging.
