What am I looking at?
Visual recognition
Radiopharmaceutical preparation delivered through the microcatheter at the intended treatment position, with subsequent assessment performed by nuclear-medicine imaging rather than fluoroscopy alone.
07-11
Technetium-99m MAA
Radioembolization mapping agent
Three-panel learning framework
Recognition, context, and distinction
What does it do, and where will I see it?
Use & procedural context
Radiolabeled macroaggregated albumin injected during the planning angiogram to simulate microsphere distribution and quantify the lung shunt fraction before Y-90 radioembolization. Typical procedural contexts include pre-Y-90 mapping and work-up to assess hepatopulmonary shunting and extrahepatic deposition.
What most clearly distinguishes it from similar devices?
Key distinctions
Technetium-99m MAA is a mapping agent rather than the therapeutic radioembolic itself; its distribution is evaluated with nuclear-medicine imaging before Yttrium-90 treatment.