Retrograde Pyelogram Vs Ivp. The retrograde contrast media injection reveals a slim upper urinary tract; Retrograde pyelography uses a special dye (“contrast agent”) injected into the ureters.

Retrograde pyelography (also known as retrograde pyeloureterography ) is a method of imaging the upper urinary collecting system. Retrograde pyelography uses a special dye (“contrast agent”) injected into the ureters.