Fig. 4From: Point-of-care ultrasound for evaluating intra-abdominal calcification in the pediatric emergency department: case series and review of literatureRenal calculi: Renal calculi seen in the renal pelvis as an echogenic focus (long thin arrows). There is associated posterior acoustic shadowing seen behind the echogenic foci (thick arrows). Pelvicalyceal dilation is also seen secondary to obstructive uropathy (star)Back to article page