Leo George Rigler (1896-1979) was an American radiologist. Eponymously affiliated with Rigler sign; Rigler triad; Rigler notch sign; Hoffman-Rigler sign
Rigler triad; Imaging findings in patients with gallstone ileus with an ectopic gallstone causing small bowel obstruction, and pneumobilia
Radiographic sign of pneumoperitoneum. Air in the peritoneum and air within the intraluminal spaces outline the luminal and serosal surfaces of the bowel wall.