Fig. 2From: Gamma camera imaging characteristics of 166Ho and 99mTc used in Selective Internal Radiation Therapy(a) Count rate performance measured for 99mTc with LEHR and MELP collimator and for 166Ho measured with MELP collimator. (b) 99mTc and 166Ho spectrum obtained in phantom setup used for count rate performance. The curves are normalized to the sum of the counts in each photopeak window. The dashed lines represent the 99mTc photopeak window centered at 140 keV and the 166Ho photopeak window at 81 keVBack to article page