Feasibility and Initial Performance of Simultaneous SPECT-CT Imaging Using a Commercial Multi-Modality Preclinical Imaging System

Table 4

Ratios of peak-to-valley calculations.

Ratios between decreasing rod sizes
	37 min	72 min	SPECT-CT	Average of all scans
4.8, 4.0 to 3.2 mm	1.72	2.04	1.86	1.87
3.2 to 2.4 mm	2.43	1.45	1.72	1.87