Normal renogram curve?
Normally, the curves show rapid uptake (flow curve on left) and rapid drainage (function curve on right). Each kidney is plotted separately.
Perfusion panal and drainage panal
Perfusion panel - Notice that the time intervals are in seconds. Both kidneys show prompt uptake, but the right kidney doesn’t get quite as bright.
Drainage panel - The left kidney shows prompt drainage, but the right kidney retains the radionuclide even in the last image.
Types of O`reilly Curves in renogram?
• Type I—normal response
• Type II—obstructive response (high-pressure system)
– no response to frusemide
– Inconclusive if GFR <15mL/min
• Type IIIa—dilated but not obstructed (low pressure/ hypotonic system)
– stasis rather than obstruction
– prompt elimination following frusemide injection
• Type IIIb—equivocal response
– languid response to diuretic
– Repeat study with F-15
• Type IV—delayed compensation (Homsy’s sign)
– “double peak” response to diuretic
– F-15 diuresis often reveal obstructed pattern