Final answer:
Nonionic contrast media is used in radiographic procedures when there is a concern for allergic reactions or kidney damage. The intravenous urogram would require nonionic contrast media. Myelograms, cystograms, and venograms can use either nonionic or ionic contrast media depending on the specific situation.
Step-by-step explanation:
Nonionic contrast media is used in radiographic procedures when there is a concern for allergic reactions or kidney damage. It is less likely to cause adverse effects compared to ionic contrast media. Therefore, the radiographic procedure that would require nonionic contrast media as opposed to ionic contrast media is the intravenous urogram.
In a myelogram, a contrast agent is injected into the spinal canal for imaging of the spinal cord and nerve roots. Both nonionic and ionic contrast media can be used in this procedure, but nonionic contrast media is often preferred to minimize potential risks.
A cystogram involves the use of contrast media to visualize the bladder. Both nonionic and ionic contrast media can be used in this procedure as well.
A venogram is a radiographic study of the veins. While nonionic contrast media can be used, ionic contrast media is typically preferred for venograms.