Pyelogram (or pyelography or urography) is a form of imaging of the renal pelvis and ureter.Types include:
Intravenous pyelogram – In which a contrast solution is introduced through a vein into the circulatory system.
Retrograde pyelogram – Any pyelogram in which contrast medium is introduced from the lower urinary tract and flows toward the kidney (i.e. [Source: Wikipedia 
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