contrast enhancement


Also found in: Acronyms.

con·trast en·hance·ment

the intravenous administration of water-soluble iodinated contrast material, which increases the CT number of the vascular pool, as well as some lesions (particularly in the brain), due to abnormal leakage into the interstitium; the property of showing increased radiopacity from concentration of contrast medium.
References in periodicals archive ?
In a cirrhotic liver, lesions that show contrast enhancement in the arterial phase and washout in the portal or late phase should be considered as HCC until proven otherwise (Figure 5) (15).
On MRI, multiple, bilateral intratesticular mass lesions are detected, ranging in size from 1 to 6 mm, hypointense on T2-weighted imaging, with mild contrast enhancement (Fig.
The authors emphasized the lack of contrast enhancement in the brain convexity, suggesting that this could lead to a debate on the role of arachnoid villi in CSF absorption.
The types of MFs for input variables and output variables used in Mamdani FIS are considered using three membership functions (MFs) such as Triangular, Gaussian and Bell shaped membership function for image contrast enhancement. Their combinations of input variables and output variables used in Mamdani FIS are studied for evaluation of image contrast enhancement.
Though these methods can perform good contrast enhancement, they cause more annoying side effects, including failing with images having nonsymmetric distribution [8], failing to preserve mean brightness [9], producing more annoying side effects [10], and losing structural information [12].
The contrast enhancement did not become weak at MI > 0.6 even if the contrast agent was exposed to ultrasound for 10 minutes.
This study elucidates the relationship between the number of CT images, including data about contrast enhancement for creating classification models, and accuracy of models.
The examination showed an intraorbital mass that was inhomogeneously hypointense on T2-weighted images and hypointense on T1-weighted images and showed intense and inhomogeneous contrast enhancement. The mass was located in the lateral orbit cavity extending to the ethmoid and maxillary sinuses, with bony destruction, encasing and displacing the medial rectus and superior oblique muscles, optic nerve, ocular globe, and vascular structures (Figure 1).
MRI revealed enlargement of the L superior and inferior ophthalmic veins without contrast enhancement concerning for thrombosis (Figure 2).
Virtual monochromatic images are particularly useful for evaluation of the differences in contrast enhancement between the spine and spinal canal.
Contrast enhancement is variable, most DTs demonstrating mild-to-moderate enhancement [6].
(iii) late contrast enhancement at dynamic sequences, usually at after 4-minute phases