Fig. 4From: Evaluation of two intraoperative gamma detectors for assessment of 177Lu activity concentration in vivoDetector response of the two detectors for the 177Lu line source located at a depth of 0–80 mm. The y-axes show relative count rate, i.e. signal intensity values normalised to the signal intensity measured at lateral position 0 mm at a depth of 0 mm. The uncertainty in the position of the detector was about ±0.5 mm for each measurementBack to article page