Preparation: 16oz of fluid one hour prior to scan.  Patient will be asked to empty bladder prior to exam starting.

Dose:10mci MAG3

A standing  order for 40mg of Lasix has been established by the radiologist and the lasix must be acquired from the pharmacy prior to exam start.

Procedure:  An intravenous line will be placed in the patients arm prior to being positioned under the camera.  The patients will be positioned on the imaging table with the tip of the zyphoid at the top of the imaging field and the urinary bladder at the bottom of the imaging field.  The patient should be centered in the middle of the imaging table.  Detector 2 will placed under the imaging table.

Number of frames: 20 segment one      120 segment two

Time per frame:      3sec segment one   30sec segment two

Matrix 128×128 (both segments)

Zoom:1.23

Detector:2

Analyzer: TC99m-NMG

Orientation: head out

Lasix will be given 20 minutes into imaging.  The frame and time of the lasix injection should be noted for processing of the images.  Post lasix injection the patient should be encouraged to continue until exam completion but if they are unable to continue the exam will be stopped to allow the patient to void.

A post void image will be obtained.

Renal analysis will be performed with ROI’s drawn over the kidneys with the renal pelvis excluded, aorta, and urinary bladder.  A second analysis will be performed with the renal pelvis included in the ROI and the lasix injection time documented.

Images and analysis screens will be adjusted for optimal intensity and sent to PACs