TABLE 2

Quantitation of PET Images (n = 1 or 2) for ¹²⁴I- and ⁸⁹Zr-Labeled αHER2 Fab-PAS₂₀₀

	⁸⁹Zr⋅Df-Fab-PAS₂₀₀				¹²⁴I-Fab-PAS₂₀₀
Parameter	6 h	24 h	48 h	72 h	6 h	24 h	120 h
%ID/g in tissue
Tumor	10	13	10	6.2	6.8	2.4	0.4
Muscle	1.7	0.8	0.9	0.6	0.7	0.2	0.004
Liver	9.4	7.6	5.1	3.7	3.7	1.5	0.1
Kidney	62	62	56	34	3.4	0.9	0.03
Tumor-to-muscle ratio	6.2	17	11	9.8	9.7	15.7	85