Ultrasonography is superior to plain radiography in the diagnosis of pneumoperitoneum (Br J Surg 2002; 89: 351-4).
Romero
J A
JA
Castaño
N
N
D006801:Humans; D011027:Pneumoperitoneum / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000592:standards; D014463:Ultrasonography