Fig. 7
From: Imaging the postoperative patient: long-term complications of gastrointestinal surgery
a, b Patient with an incisional external hernia. A cluster of fluid and air-filled dilated bowel loops is found inside the hernial sac on the right flank (stars). Narrowing of the afferent and efferent ends of the closed loop at the site of hernial neck can also be appreciated—the beak sign (arrows in a). Stretching of the mesenteric vessels is seen on the coronal reformation (arrowhead in b)