![](https://i0.wp.com/radrounds.com/wp-content/uploads/2021/03/Riglersign.jpeg?resize=483%2C650&ssl=1)
Diagnosis: Rigler Sign – Free air – Pneumoperitoneum
Modality: X-Ray
Findings: Rigler sign with clear walls of the bowel loops distinctly seen due to physical separation of bowel loops.
Credit: Submitted by Dr. Saeed Rad M.D. to radRounds Radiology Network