TABLE 1
Collimator and Radionuclide Combinations for CT Attenuation Correction Evaluation
Radionuclide
Energy
Collimator
201
Tl
70 keV
Low-energy, high-resolution
99m
Tc
140 keV
Low-energy, high-resolution
111
In
172 and 247 keV
Medium energy
131
I
364 keV
Medium energy
131
I
364 keV
High energy
18
F
511 keV
High energy