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. Author manuscript; available in PMC: 2013 Nov 1.
Published in final edited form as: Contrast Media Mol Imaging. 2012 Nov-Dec;7(6):494–500. doi: 10.1002/cmmi.1479

Fig. 1.

Fig. 1

Mixed isotope phantom validation for activity measurement with the dual-isotope protocol. a) 99mTc activity measures per volume from the SPECT image and gamma counter. b) 111In activity measures per volume from the SPECT image and gamma counter. Error bars were determined from the standard deviation across voxels in the SPECT images, and the uncertainties in the gamma counter derived measures were smaller than the marker size. Linear regression analysis also shown.