Additional file 1: of Ra-223 SPECT for semi-quantitative analysis in comparison with Tc-99m HMDP SPECT: phantom study and initial clinical experience

Figure S1. Configuration of a cylindrical phantom (A) and summed transaxial images (slice thickness, 14 cm) at 84 keV with MEGP (B) and HEGP (C) collimators. The phantom was filled with water, and a hot rod (2.0 kBq/mL) was embedded along the phantom axis. Circular regions-of-interest were placed on the hot rod and background. MEGP, medium-energy general purpose; HEGP, high-energy general purpose. Figure S2. SPECT counts in a hot rod (Hr) and background (BKG), hot rod-to-background ratio (HBR) and contrast-to-noise ratio (CNR) at 84 keV ± 20%, 154 keV ± 10% and 269 keV ± 5%. (DOCX 2051 kb