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CUDURADA FAAFA

Renal Scan

 

  www.uroradiology.net

 

• Name of the procedure

• Indications

• Contraindications

• Patient Prep

• Radiopharmaceuticals

• Adjunct pharmaceuticals

• Acquisition parameters

• Computer processing parameters

• Normal results

• Abnormal result

 

1. Name of the Procedure: Renal scan (Function) with Lasix Renogram.

2. Indications: The test evaluates blood flow to the kidneys. Onset hypertation; infection; obstruction; Information about renal size, location and anatomy; renal artery stenosis; Tumors. 

3. Contraindications: none

4. Patient Preparation: Patients should be well hydrated before the test. If an oral ACEI is used, patients should drink only water and should not eat a solid meal within 4 hrs of the study. Dehydration and over-hydration should be avoided. Patient’s history should be obtained and include any history of cardiovascular disease, medications, and the efficacy of blood pressure control. A sitting and standing blood pressure and heart rate should be measured before the exam, and at the conclusion of the test. 

5. Radiopharmaceuticals: Tc-99m MAG3; Administered activity is 5-10 mCi; Rout e of administration is intravenous injection; bolus injection in antecubital vein.  Injection to imaging time is immediate.

6. Adjunct Pharmaceutical: none

7. Acquisition Parameters: The study is acquired with the gamma camera facing the lower back of supine patient. (View: posterior. For transplant, anterior view is taken). Low energy, all-purpose, parallel hole collimator is used or pinhole if needed. Photo-peak selection should be 140 keV with 20% window. Kidney and bladder should be visualized even though it is better to include heart in the field of view. Matrix resolution is preferably 128 x 128, but 64 x 64 can also be used.

   • Renal Scan (Function): Imaging time takes 30 min. 15 Dynamic images; 2 min each are obtained.

   • Furosomide (0.3 mg/kg) is given intravenously about 15 min in to the study if excretion delay is seen. After giving Fursomide, continue with dynamic images for about 10 more frames. Take the pressure of the patient before injecting Lasix.

8. Computer Processing:  Choose patient’s name; then click renal processing; Click ROI; then click ROI tool; draw region of interest around the left kidney; then draw the ROI around the right kidney; click ok; then click flexible display tool; then click result composite; click hardcopy; click result/display, and print the picture.

9. Normal Result: Imaging reveals findings compatible with normal blood flow to the kidneys. Normal blood flow through the vessels is desired. Normal size, shape, position, and function of both kidneys are found. Normal kidney function should be more than 35% each kidney.

10. Abnormal Result:  Abnormal results indicate reduced kidney function. Abnormal size, shape, and position of the kidney. Abnormal kidney function is less than 35% each kidney.

 

www.gamma.wustle.edu

 

 

 

 

 

 

 

 

 

A/Razaq H.Nuurre

Nuclear Medicine

Ohio, USA