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The empty delta sign is a radiologic sign seen on brain imaging which is associated with cerebral venous sinus thrombosis.It is usually seen on magnetic resonance imaging (MRI) or computed tomography (CT) scans with contrast.
In the first two weeks, the "empty delta sign" may be observed (in later stages, this sign may disappear). [11] The empty delta sign is characterized by enhancement of the dural wall without intra-sinus enhancement. [6] Magnetic resonance venography employs the same principles, but uses MRI as a scanning modality. MRI has the advantage of being ...
Bamboo sign; Banana sign; Bat wing appearance; Bear paw sign; Beveled edge sign; Bird of prey sign; Bite sign; Black pleura sign; 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 ...
The empty sella sign is a radiological finding characterized by the partial or complete filling of the sella turcica with cerebrospinal fluid (CSF), causing the pituitary gland to appear flattened or compressed against the walls of the sella. [1] This results in the sella appearing "empty" on imaging, despite the presence of a compressed ...
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).
The comb sign is a radiological sign seen on computed tomography or magnetic resonance imaging scans, primarily used to identify inflammation in the mesentery. [1] It refers to the appearance of engorged mesenteric vessels resembling the teeth of a comb, which is a key feature seen in several abdominal conditions, particularly those associated with inflammatory bowel diseases, such as Crohn's ...
Empty sella syndrome is the condition when the pituitary gland shrinks or becomes flattened, filling the sella turcica with cerebrospinal fluid instead of the normal pituitary. [2] It can be discovered as part of the diagnostic workup of pituitary disorders, or as an incidental finding when imaging the brain.
A pseudosubarachnoid hemorrhage is an apparent increased attenuation on CT scans within the basal cisterns that mimics a true subarachnoid hemorrhage. [1] This occurs in cases of severe cerebral edema, such as by cerebral hypoxia.