Fig. 4From: Precise activity measurements of medical radionuclides using an ionization chamber: a case study with Terbium-161Left: scheme showing the locations of the probe for measurements at 0.5 and 1 cm with respect to the bottom of the vial and location of the probe for the bottom thickness measurement. For each position the vial is rotated manually to perform 10 measurements along its circumference. Right: picture of the measurement toolBack to article page