Genitourinary System Imaging
Vesicouretal Imaging
Subtopic
Morphological Renal Imaging
Renal Scintigrahy w/ Ace Inhibitor
Diuretic Renal Scan
Functional Renal Imaging
Procedure
-Patient is supine
-one arm can be at patient's side and other
is placed on side table for easy flow injection
-bolus of rph inject via IV
-IV at antecubital preferred
-Sternal notch in top one third
of image
-Begin flow acquisition immediately
after injection
Images
Post Void
-posterior static acquisition
for 2 minutes
Function
-Dynamic acquisition
-19 minutes of 20 s/frame
Flow
Renal Perfusion
-Dynamic acquisition
-30 frames x 2s/frame
-1 minute total time
Technical Details
-Single or dual head gamma camera
-full field of view for adults
-LEAP (all purpose) collimator
-128x128 flow
-256x256 function
-Camera position posterior
-Camera anterior if previous kidney
transplant
Radiopharmaceutical
99mTc-DTPA (Pentetate)
-Cleared by glomerular filtration
with minimal binding to the renal
parencyma
-Useful for Glomerular Filtration Rates (GFR)
-Useful for blood flow rates to each kindey
99mTc-MAG3 (Mertiatide)
Facts
-Excreted by tubular secretion
-high first pass extraction fraction
-rapid plasma clearance
-Preferred over DTPA (Pentetate)
-Used for Effective Renal Plasma Flow (ERPF)
Dose Amount
10-20 mCi
Patient Preparation
-patient history (abdominal surgery)
-Patient should hydrate well before exam
-void just before exam
Contraindications
-recent iodine contrast study
-pregancy
Indications
-Evaluation of a renal transplant
-Evaluation of acute renal failure
-Measurement of relative renal function
