target sign

A cross sectional appearance of the large intestine—enhanced mucosa and serosa and lucent central submucosa—caused by oedema or inflammation of bowel wall

target sign

GI imaging A smoothly-contoured radiopacity with both central and peripheral radiolucency, which may be seen in pedunculated colonic polyps, when viewed.en face by double contrast–air-contrast barium studies; an 'eccentric' target sign is seen in GI diverticuli where a small amount of radiocontrast enters the pouch and is surrounded by the radiopaque body of a diverticulum Lung imaging A circumscribed pulmonary aspergilloma or focus of necrotizing bronchopneumonia seen in a plain CXR. Cf Coin lesion.
References in periodicals archive ?
Protesters injured in previous weeks of violence were put at the front of the protests with some wearing eye patches with a target sign on them.
If intussusception is present, the target sign with alternating hypoechoic and hyperechoic lines can be seen.
Contrast-enhanced abdominal computed tomography (CT) revealed dilated small bowel loops due to ileoileal intussusceptions (target sign) and free fluid in the Douglas pouch (Figure 1 a, b).
The presence of a sausage shaped lump in the right upper quadrant and empty right iliac fossa and the ultrasound picture of target sign along with confirmatory proof revealed via CT scan, helped us to come to a diagnosis and we proceeded for the laparotomy.
The patient underwent an abdominal ultrasound for the diagnosis of abdominal pain, and as a result, a "target sign" was seen in the left lower quadrant of the abdomen; however, the diagnosis could not be confirmed, thereby necessitating computed tomographic evaluation.
Abdominal ultrasound revealed proximal bowel dilatation with a mural thickening of up to 9.3 mm and an intraluminal echogenic appearance (target sign) in a 10-cm-long proximal intestinal segment.
Appendiceal intussusception can be diagnosed on ultrasonography as a classic target sign. (11) On computed tomography it typically appears as a mass within the cecum or as a target sign.
Important MRI features described in cerebral toxoplasmosis include the "concentric target sign" in T2 weighted imaging and the "eccentric target sign" in postcontrast T1 weighted sequences [3, 4].
(5) The classic ultrasound finding is of a target sign and emergency physicians with limited training can accurately diagnose ileocolic intussusception in children by using bedside ultrasonography.
Ultrasound criteria include a diameter greater than 6 mm, concentric rings (target sign), an appendicolith, high echogenicity, obstruction of the lumen, and fluid surrounding the appendix.
Radiologic characteristics mainly included involvement of [less than or equal to] 3 segments, thickening bowel wall, asymmetrical pattern of involvement, intraluminal pseudopolyp formation, target sign, circumintestinal exudation, stricture with proximal dilation, comb sign, fistula, abscess, phlegmon, and ascites.
One randomized pass-or-fail trial was conducted in which participants were given 10 minutes to locate and navigate toward the target sign using only the BrainPort.