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Active gastrointestinal bleeding localization with Tc-99m labeled autologous RBCs — in vivo / modified in vivo vs in vitro (kit/UltraTag) labeling as a living study template, a facility acquisition journey with Maggoo, interpretation cases, and board-style questions.
Facts follow the labeling protocol selected under Image acquisition (In vitro kit vs In vivo, top-right toggle). Values are typical SNMMI teaching ranges.
Med / history pearls shared across the in vitro and in vivo labeling protocols — this study has very few true holds. Click an item for why it matters and what happens if it is overlooked.
Top-down facility view. Maggoo follows the in vitro (kit) labeling protocol: check-in → blood draw and kit labeling in the dose room → IV reinjection of labeled RBCs → continuous anterior dynamic imaging for 60–90 minutes → optional delayed imaging at 2–24 hours → departure.
Ready. Press Play to watch Maggoo’s study day.
Open-access clinical Tc-99m RBC GI-bleed scintigrams (Radiopaedia, CC BY-NC-SA) for active bleeding patterns (serial frames from one small-bowel bleed case), with synthetic filmstrip schematics for normal and artifact cards.
Board-style items on RBC labeling methods, dosing, the active-bleeding sign, and interpretive pitfalls.