Mount Pleasant, South Carolina Health Index. Air quality in Mount Pleasant, South Carolina is 67 on a scale to 100 (higher is better). This is based on new measures of hazardous air pollutants from the EPA, called the National Air Toxics Assessment.
Hypoattenuation is a term used to describe areas that show up as whiter and brighter than normal on an x-ray or CT Scan. Hypoattenuating lesions are commonly referred to in regards to the liver or kidneys.
Hypoattenuated, or low-density, areas appear darker on CT scans than hyperattenuated, or high-density, areas. The most dense body parts, such as bone, appear the brightest. As stated on MedPix, blood clots and tumors in the brain appear whiter than brain matter.