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 HomeNew benchmark helps monitor cumulative CT radiation doseFebruary 13, 2026Study questions routine use of radiotherapy after bone surgeryFebruary 13, 2026CEUS outshines color Doppler imaging for indeterminate kidney lesionsFebruary 13, 2026Women's Imaging MinnieCast, Episode 2: Risk-based vs. annual mammography screening, part 1February 13, 2026