Final answer:
The exams listed in order from highest to lowest radiation dose are: Barium Enema, Lumbar spine, KUB, and Chest. A Barium Enema typically involves the highest dose due to the need for multiple images with a contrast material, followed by the Lumbar spine, with its denser bone penetration requirements, then the KUB, and finally the Chest X-ray with the lowest dose.
Step-by-step explanation:
When listing the exams from highest to lowest dose of radiation, one would generally expect the exams that cover larger areas or have the potential for greater absorption by the body to deliver a higher dose. In medical imaging, certain procedures are known to expose patients to different amounts of radiation. It is important to note that different factors can influence the exact dose received, such as the specifics of the machine used, patient size, and the length of the exam. *Please, refer to the latest radiology guidelines or consult a professional for the most accurate information, as my answer is based on common procedures and might not reflect the latest data.*
Typically, a Barium Enema would involve a higher dose because it requires several X-ray images to be taken in order to visualize the colon fully after it has been filled with a barium contrast material. A lumbar spine examination also requires a significant radiation dose due to the need to penetrate denser bone and the typical number of images taken from multiple angles. A KUB (kidneys, ureter, bladder) X-ray may also carry a moderate dose, depending on the exact nature of the examination. A normal chest X-ray typically delivers a lower dose of radiation relative to the other exams listed.
Based on this, the order from highest to lowest dose would be:
- Barium Enema
- Lumbar spine
- KUB
- Chest