MAG3 scan
Pronunciation: mag-three scan
Also written as: MAG3 — mercaptoacetyltriglycine
A nuclear medicine study using technetium-99m mercaptoacetyltriglycine to assess kidney function and drainage.
Full Definition
A MAG3 scan is a nuclear medicine study that uses technetium-99m mercaptoacetyltriglycine (MAG3) to evaluate both kidney function and urinary drainage patterns. This imaging modality is particularly valuable in pediatric urology for assessing suspected ureteropelvic junction obstruction, evaluating differential renal function, and monitoring treatment outcomes. The scan provides both functional and anatomical information, making it superior to static imaging for drainage assessment.
Usage
Usage note: Always capitalize MAG3; distinguish from DMSA which assesses function only, not drainage.
In Context
- "The MAG3 scan demonstrated delayed drainage from the left collecting system consistent with UPJ obstruction." — radiology report
- "Post-operative MAG3 scan showed improved drainage patterns following pyeloplasty." — follow-up imaging report