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The dark areas on both sides of the intestines indicate that air is present in both sides. This is called "Rigler's sign". A radiologic sign is an objective indication of some medical fact (that is, a medical sign) that is detected by a physician during radiologic examination with medical imaging [1] (for example, via an X-ray, CT scan, MRI scan, or sonographic scan).
Positive John Thomas sign in patient with right femoral enchondroma. The John Thomas sign, [1] also known as the Throckmorton sign, [2] is a slang or joke term used in the field of radiology. It refers to the position of a penis as it relates to pathology on an X-ray of a pelvis. When the penis (visible on the X-ray as a shadow) points towards ...
Blade of grass sign (also known as Flame sign) Blumensaat's line; Bohler's angle; Bone-within-a-bone appearance; Boomerang sign; Bow tie appearance; Bowl of grapes sign; Bowler hat sign; Brim sign; Bucket handle tear; Bulging fissure sign; Bunches of grapes sign (hepatic abscess) Bunch of grapes sign (botryoid rhabdomyosarcoma) Bunch of grapes ...
In radiology, the tree-in-bud sign is a finding on a CT scan that indicates some degree of airway obstruction. [1] The tree-in-bud sign is a nonspecific imaging finding that implies impaction within bronchioles, the smallest airway passages in the lung.
The corduroy sign reflects the characteristic trabecular changes caused by the hemangioma, namely, thinning of trabeculae as well as thickened vertical struts, resulting from compensatory hypertrophy of the remaining trabeculae to maintain structural integrity. These vertical trabecular striations give rise to the "corduroy" appearance on imaging.
The polka dot sign is a radiological finding most commonly observed on axial computed tomography (CT) or magnetic resonance imaging (MRI) scans of the spine. [1] It is a hallmark feature of vertebral hemangiomas, a benign vascular tumor of the vertebral body. The sign refers to the appearance of multiple small, dot-like areas of sclerosis or ...
Silhouette sign; A) Normal chest radiograph; B) Q fever pneumonia affecting the right lower and middle lobes. Note the loss of the normal radiographic silhouette (contour) between the affected lung and its right heart border as well as between the affected lung and its right diaphragm border. This phenomenon is called the silhouette sign
In medicine, the dense artery sign or hyperdense artery sign is an increased radiodensity of an artery as seen on computer tomography (CT) scans, and is a radiologic sign of early ischemic stroke. [1] In earlier studies of medical imaging in patients with strokes, it was the earliest sign of ischemic stroke in a significant minority of cases. [2]