Additional file 1 of Quantitative calibration of Tb-161 SPECT/CT in view of personalised dosimetry assessment studies

Additional file 1. Figure S1: VOI placement of NEMA spheres and two cylindrical regions (turquoise) used as background measurement. Figure S2: Example distribution of background VOI counts over a range of activity concentration levels (0.011, 0.088, and 0.618 MBq/mL) and scan durations (2, 8, and 16 seconds). Figure S3: NEMA sphere RC and CNR as a function of post-processing Gaussian smoothing from single acquisition with 1.2 GBq in FOV with 8 second frame duration. Figure S4: Gamma spectrum obtained from Siemens Intevo-BOLD gamma camera with 990 MBq in NEMA IEC NU2 phantom over 2-minute analyser acquisition. Vertical lines indicate peaked energy windows (red = photopeak [64-79 keV], yellow = lower scatter [60-64 keV], blue = upper scatter [79-83 keV]).