A 37-year-old member asked:
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had routine ct's with contrast and without, for kidney stones. now they want to send me for a ct urogram. what is the difference?

1 doctor answer
Dr. Amy Levine
22 years experience Radiology
Contrast: A plain ct looks for stones. A ct urogram uses IV contrast (dye) to better evaluate the renal pelvis and ureter (the "tube" connecting your kidneys to your bladder). These structures are not well seen without contrast. A greater amount of contrast is used in a urogram than normal contrast ct to better fill these structures.
Answered on Mar 30, 2017
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Related questions:

A 53-year-old female asked:
Dr. Michael Gabor
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No: No, stones that passed out of the body are gone. It will show any remaining stones. There may temporarily be some residual signs of the obstruction c ... Read More
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A 44-year-old female asked:
Dr. Gurmukh Singh
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Risk vs. benefit: There is a small risk from radiation exposure of a CT scan, however, the benefit usually far exceeds the risk You may ask to have an ultrasound examin ... Read More
A 35-year-old female asked:
Dr. Saptarshi Bandyopadhyay
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Yes, but as a "void": (No pun intended). The bladder, if filled with water, would have shown up on the noncontrast CT scan. The water appears "black", & so not much det ... Read More
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A 18-year-old male asked:
Dr. Alfred Parkhill Hand
20 years experience Radiology
yes!: Yes- that is exactly how a ct for renal stones should be performed- with oral or IV contrast.

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