☞ Humans are largely composed of light elements
☞ Iodine is the heaviest element required by humans
☞ Iodine's high(er) atomic number allows it to absorb more x-rays and provide "contrast" to soft tissues
☞ Other, even higher atomic number elements may emerge as replacements for iodine
☞ Humans are largely composed of light elements
☞ Iodine is the heaviest element required by humans
☞ Iodine's high(er) atomic number allows it to absorb more x-rays and provide "contrast" to soft tissues
☞ Other, even higher atomic number elements may emerge as replacements for iodine