This landscape will feature a stunning contrast of colors, textures, and shapes. The vibrant hues of the sky will be complemented by the lush greens of the trees and grass. The rolling hills will be juxtaposed with the sharp angles of the mountains in the distance
A contrast agent is a substance used to increase the contrast of structures or fluids within the body in medical imaging. Contrast agents absorb or alter external electromagnetism or ultrasound, which is different from radiopharmaceuticals, which emit radiation themselves. In X-ray imaging, contrast agents enhance the radiodensity in a target tissue or structure. In magnetic resonance imaging (MRI), contrast agents shorten the relaxation times of nuclei within body tissues in order to alter the contrast in the image.