What is Subepicardial late gadolinium enhancement?
Abstract. Background: Subepicardial delayed gadolinium enhancement (DGE) patches without underlying cardiomyopathy is poorly understood. It is often reported as the result of prior silent myocarditis.
What is late gadolinium enhancement in hypertrophic cardiomyopathy?
Late gadolinium enhancement (LGE) on cardiac magnetic resonance imaging (CMR) is believed to represent dense replacement fibrosis. It is seen in ≈60% of adult patients with hypertrophic cardiomyopathy (HCM). However, the prevalence of LGE in children and adolescents with HCM is not well established.
What does it mean when a lesion is enhancing?
A ring-enhancing lesion is an abnormal radiologic sign on MRI or CT scans obtained using radiocontrast. On the image, there is an area of decreased density (see radiodensity) surrounded by a bright rim from concentration of the enhancing contrast dye.
What does delayed enhancement mean?
Delayed enhancement translates a relative excess of gadolinium in the pathological tissues compared to the healthy tissues. It is based on T1 weighted ultrafast gradient echo or steady state gradient echo sequences.
What is myocardial delayed enhancement?
Delayed myocardial enhancement, as seen on cardiac MRI, occurs when gadolinium contrast material seeps into fibrotic or necrotic myocardial tissue. It is due to a number of etiologies, and has variable appearances. subendocardial enhancement indicates an ischemic etiology.
How does gadolinium enhancement work?
MRI. Late gadolinium enhancement is based on the shortening of T1 and different regional distribution patterns of gadolinium-based contrast agents within the extracellular space of the myocardium. It also depends on varying uptake and washout patterns within the normal myocardium and those different disease processes.
What is delayed Hyperenhancement?
Delayed hyperenhancement is a variable finding that has been described as having two distinct patterns: patchy with longitudinal mid wall enhancement that spares the subendocar- dium and subepicardium or subendocardial or transmural enhancement that is indistinguish- able from IHD, with the latter possibly repre- …
What is contrast enhancement?
Contrast enhancement is a process that makes the image features stand out more clearly by making optimal use of the colors available on the display or output device. Contrast manipulations involve changing the range of values in an image in order to increase contrast.
