Tc-99m,
Ga-67, In-111, Xe-133, I-123, Tl-201
Traditionally...
Most
isotopes require only 1/8 to 1/4 inch of lead
Shields
are not bulky
Distance
is a good ALARA practice also
Only
other problematic isotope is I-131.
-
Partially because of higher energy (0.365
MeV)
-
Partially because of high activity (10 – 300
mCi)
