They also claimed it contained other internal organ structures, such as gill sacs, that identified it as a vertebrate, and that the animal's teeth resembled those of lamprey. (sciencedaily.com)
Contrast agents, injected into the patient during an MRI procedure and designed to be quickly cleared from the body by the kidneys afterwards, are needed to make fine details of organ structures, blood vessels, and other specific tissues clearly visible in the images. (sciencedaily.com)
I am not trying to be an expert, however, with an array of virtually unheard of medical problems (including malignant hypothermia, and erythropoetic protoporphyria) I do not take injecting things into my body lightly, as my entire organ structure is a little differently. (skepticalob.com)