NucMed > RIAScott WilliamsApr 2, 2002RIA The Schilling Test Vitamin B12 absorption physiology Indications for the Schilling Test Pre-Test Preparation Causes of false low serum B12 level Causes of false normal B12 Stage I Schilling Test Technique Calculations Causes for a false positive test Causes for a false negative test Stage II Schilling Test Stage III Schilling Test Stage IV Schilling Test Dual-isotope Schilling test Blood Volume Determination Physiology Plasma Volume Technique Calculations RBC Volume Calculations Sources of possible error Reporting Results Diagnosis Relative polycythemia Polycythemia vera Secondary polycythemia Red Blood Cell Survival Technique Calculations Splenic Sequestration Study Latest in HomeAIUM: To treat tumors, why not microbubbles?May 29, 2026AIUM: Could AI help improve eFAST learning?May 29, 2026SponsoredRadiology is Under PressureMay 2, 2026New tau PET tracer outperforms standard agent in Alzheimer’s diseaseMay 29, 2026