Fig. 6
From: Gamma camera imaging characteristics of 166Ho and 99mTc used in Selective Internal Radiation Therapy
(a) SPECT images of the NEMA image quality phantom filled with 99mTc and 166Ho in different phantom setups (spheres without background activity, sphere-to-background activity concentration ratio 8:1 & 4:1). For 99mTc, images were acquired with LEHR collimator, MELP collimator and reduced scan time. 166Ho images were acquired using the MELP collimator. Transverse slices at the level of the spheres are shown. (b) SPECT images of the NEMA image quality phantom filled with 99mTc and 166Ho at a sphere-to-background activity concentration ratio of 8:1, acquired with the standard phantom setup and the modified phantom mimicking patient obesity. Transverse slices at the level of the spheres are shown