Diuretic Renal Imaging

OFF ACE INHIBITORS FOR 1 WEEK

WELL HYDRATED

OFF ANY DIURETICS

RENAL ARTERIOGRAM USING IV
IODINATED CONTRAST

MEDICATIONS THAT BLOCK
TUBULAR SECRETION

DISTINGUISH BETWEEN OBSTRUCTIVE
HYDRONEPHROSIS AND NON-OBSTUCTIVE
COLLECTING SYSTEM DIALATION

EVALUTION OF RENAL FUNCTION AND
URODYNAMICS

TC99m-MAG3 (10-20 mCi)

TC99m-DTPA (10-20 mCi)

FINAL IMAGES

VISUAL UPTAKE

RENOGRAM

SHOWS TIME
ACTIVITY CURVE

40 mg FOR ADULTS

1 mg/kg FOR CHILDREN

USUALLY ADMINISTERED 15-20 MIN
AFTER RPH INJECTION OR WHEN
PELVIS IS DIALTED

STARTS IMMEDIATELY, 2 MIN
FLOW FOLLOWED BY
18 MIN OF DYNAMICS (USUALLY)

POSTERIOR

IMAGE FOR AN ADDITIONAL 20
MIN AFTER FUROSEMIDE INJ.

CLEARANCE HALF TIME OF 8-12 MIN
THUS SHOWING NORMAL RENOGRAM

HOMOGENEOUS UPTAKE

BOTH KIDNEYS VISUAL

CLEARANCE HALF TIME OF
<8 MIN OR >12 MIN

ONE OR NO KIDNEY VISUAL

HETEROGENEOUS UPTAKE