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Collimator Selection, Acquisition Speed, and Visual Assessment of 131I-Tositumomab Biodistribution in a Phantom Model

Hung K. Tan, CNMT, Richard W. Wassenaar, PhD and Wanzhen Zeng, MD, PhD

Division of Nuclear Medicine, Ottawa Hospital, Ottawa, Ontario, Canada


Figure 1
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  		FIGURE 1.  Total counts from identical circular regions placed over the 4-cm sphere and over an area of background were used to determine tumor-to-background contrast.

 

Figure 2
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  		FIGURE 2.  Anterior and posterior images using high- and medium-energy collimators for acquisition speeds of 20 (A), 60 (B), and 100 (C) cm/min. All images have been adjusted to the same color scale to better illustrate differences in image quality.

 




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