TABLE 1
Average Density Ratios for Baseline SPECT Images
Isotope
ROR (cm)
Average density ratio
ANT/IP
SEP/LAT
99m
Tc
21.0
1.10
1.05
25.0
1.07
1.05
29.2
1.05
1.03
201
Tl
21.0
1.18
1.05
25.0
1.12
1.03
29.2
1.08
1.01