The phrase "abnormal contrast" is correct and usable in written English.
It can be used in contexts such as photography, medical imaging, or data analysis to describe a difference that deviates from the norm.
Example: "The abnormal contrast in the MRI images indicated a potential issue that required further investigation."
Alternatives: "unusual contrast" or "irregular contrast".
However, CT and conventional MRI including (contrast-enhanced) T1-weighted and T2-weighted sequences are limited in that they basically only allow for the detection of anatomical abnormalities and abnormal contrast enhancement, as a result of which small lesions and non-enhancing lesions in normal-sized structures may be missed.
The aim of this 8-year retrospective review was to determine the clinical significance of gadolinium-enhanced magnetic resonance imaging (MRI) findings in retinoblastoma patients after enucleation, particularly the presence of abnormal contrast enhancement of the transected optic nerve.
To investigate the relationship between abnormal contrast sensitivity and abnormal color vision among human immunodeficiency virus (HIV -infected individuals wHIV -infectedl vindividualsy and to seek host factors that predict these abnormalities.
A significant correlation (p < 0.01) was found between abnormal contrast enhanced cardioplegia patterns and depression of left ventricular function.
Evaluating the time attenuation curves generated by either of these techniques is important to understand normal and abnormal contrast arrival and pulmonary transit time.
The CT technician subsequently called the radiologist to check the images and ask for a repeat injection after identifying abnormal contrast enhancement.
None of these ROIs showed abnormal contrast-enhancement or FLAIR signal on co-registered MR images.
This manifests on CT as an abnormal contrast-containing cavity adjacent to the aortic valve, which freely communicates with the aortic lumen.
Portal venous gas, pneumatosis intestinalis and, to a lesser extent, abnormal contrast-induced bowel wall enhancement were poorly sensitive, but exhibited good specificities of 95, 85 and 71%, respectively.
A semi-quantitative grading scale was used to describe (abnormal-) contrast enhancement in the different soft tissue structures: none (no enhancement), mild (minimal enhancement), moderate (apparent enhancement) and severe (obvious enhancement).
The current review article outlines normal and abnormal intravenous contrast dynamics, discusses how to recognize etiologies of non-diagnostic scans, and ultimately addresses techniques to overcome obstacles towards obtaining normal contrast opacification of the target vessel.
