TABLE 3

Radioactive Particle Size Distribution

^99mTc-colloid	% Activity in particle size range (d_v, μm)
^99mTc-colloid	>0.2	0.1–0.2	0.1–0.02	<0.02
Antimony trisulfide*	0.7 ± 0.1	2.9 ± 1.5	6.7 ± 5.0	89.7 ± 5.9
Rhenium sulfide^†	72.1 ± 5.6	6.6 ± 1.7	20.0 ± 5.9	1.3 ± 0.3

↵* n = 5.
↵† n = 6. Percentage radioactive particle size distribution above 0.2 μm (n = 3): >0.8 μm, 56.0% ± 4.8%; 0.8–0.45 μm, 3.9% ± 1.8%; 0.45–0.2 μm, 10.3% ± 1.7%; 0.2–0.1 μm, 7.0% ± 2.4%; 0.1–0.02 μm, 21.3% ± 5.0%; <0.02 μm, 1.5% ± 0.3%.