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Non-invasive Imaging of Acute Allograft Rejection after Rat Renal Transplantation Using 18F-FDG PET
Published on: April 28, 2013
Renal scintigraphy in the acute care setting
Efrosyni Sfakianaki1, George N Sfakianakis, Mike Georgiou
1Department of Radiology, Division of Nuclear Medicine, University of Miami, Miller School of Medicine and Jackson Memorial Hospital, Miami, FL, USA. esfakianaki@med.miami.edu
Seminars in Nuclear Medicine
|February 19, 2013
Summary
Renal scintigraphy using technetium-99m mercaptoacetyltriglycine and furosemide effectively diagnoses kidney issues in acute care. This imaging method provides both functional and anatomic data for conditions like renal colic, pyelonephritis, and acute kidney injury.
Area of Science:
- Nuclear Medicine
- Radiology
- Urology
Background:
- Renal scintigraphy offers crucial functional and anatomic insights, particularly valuable in acute care settings.
- A standardized 25-minute protocol using technetium-99m mercaptoacetyltriglycine and furosemide has been utilized for two decades in native and transplant kidneys.
- This protocol is widely applied in evaluating acutely ill patients with diverse renal conditions.
Purpose of the Study:
- To highlight the utility of a specific renal scintigraphy protocol in the acute care setting.
- To demonstrate the protocol's effectiveness in diagnosing various renal pathologies, including obstruction, infection, and acute kidney injury.
- To present characteristic scintigraphic patterns associated with specific clinical entities.
Main Methods:
- Utilized a 25-minute renal diuretic protocol involving technetium-99m mercaptoacetyltriglycine and simultaneous intravenous furosemide.
- Applied the protocol to patients of all ages with both native and transplant kidneys in an acute care setting.
- Identified and standardized characteristic scintigraphic patterns for conditions such as renal colic, pyelonephritis, urine leaks, and acute tubular necrosis.
Main Results:
- Effectively stratified patients with renal colic into four patterns: no obstruction, partial obstruction, complete obstruction, and stunned kidney.
- Delineated a pattern of "regional parenchymal dysfunction" indicative of acute pyelonephritis.
- Identified a scintigraphic pattern of "relative preservation of flow as compared to function" suggesting acute tubular necrosis.
Conclusions:
- The described renal scintigraphy protocol is a versatile and effective tool for evaluating acutely ill patients with native and transplant kidneys.
- The protocol aids in differentiating various causes of acute renal failure and identifying specific renal pathologies.
- Established scintigraphic patterns provide valuable diagnostic information for conditions ranging from urolithiasis to pyelonephritis and acute tubular necrosis.
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