The technique of injecting contrast media into a vein and taking radiographs of the kidneys, ureters, and bladder is termed:

There are numerous methods in which intravenous contrast is used to be able to visualize a well an organ, in case you want to observe the urinary tract, a Computed Axial Tomography of the urinary tract is used, the same with the digestive system.

you may having too much sleep.. a good night sleep consists of about 7 hours. more than that could be the reason you're still tired throughout the day.

a.) carbohydrates

i believe