Jul 30, 2023 · The cortical rim sign describes the thin, viable rim of subcapsular cortex seen on contrast-enhanced CT or MRI in major renal vascular compromise including: renal artery obstruction from embolism, thrombosis or dissection

Oct 16, 2024 · rim sign: widened glenohumeral joint >6 mm acute angle of the scapulohumeral arch (Moloney's arch) is also present and can be used to distinguish from anterior dislocation

Feb 28, 2023 · The rim sign can be seen in association with chronic hydronephrosis. In patients with chronic hydronephrosis, in all forms of contrast-enhanced imaging of the obstructed kidney, enhancement may occur in the residual, but markedly atrophic, renal parenchyma, surrounding the dilated calyces and renal pelvis 1,2.

May 11, 2023 · The dual or double rim sign is seen on MRI in approximately 75% of cerebral abscesses and is helpful in distinguishing an abscess from a glioblastoma. On both susceptibility weighted imaging (SWI) and T2WI it consists of two concentric rims surrounding the abscess cavity, outer one of which is hypointense, and the inner one relatively more ...

Nov 13, 2022 · The putaminal rim sign, also known as the putaminal slit sign, is said to be a relatively specific sign of multiple system atrophy - parkinsonism (MSA-P), and refers to a linear region of high signal surrounding the lateral aspect of the putamen at 1.5 T MRI on T2 weighted images or ADC map.

May 11, 2023 · The reverse rim sign describes relative hypoenhancement of the renal cortex and normal enhancement of the renal medulla on contrast-enhanced CT and MRI. This enhancement pattern can also be visualized using contrast-enhanced ultrasound 2.

Jan 11, 2024 · Contrast-enhanced CT demonstrates a non-enhancing renal cortex and a normal enhancing renal medulla (reverse rim sign). A very thin rim of contrast enhancement (cortical rim sign) may persist and should not be mistaken for adequate perfusion.

May 19, 2019 · The rim sign has been described as a helpful MRI sign of spinal cord metastases, enabling them to be distinguished from other enhancing spinal cord lesions (e.g. ependymoma and astrocytoma).

Apr 25, 2019 · The rim sign can be seen in cases of pulmonary infarction on PET-CT with very mild peripheral continuous FDG uptake and the complete absence of central uptake. This is a different appearance to that seen in lung abscesses or necrotic tumors, whereby the peripheral FDG-avidity is marked.

Aug 6, 2024 · The soft tissue rim sign is used to distinguish a ureteric calculus from a phlebolith. The former appears as a calcific density with a surrounding soft tissue rim, representing the edematous ureteric wall.