Table 1. Ratio of Radioactivity Accumulation in the Gray Matter of Aβ(+)/tau(+) (c) against Aβ(+)/tau(−) Brain Sections (a).

compd	c/a ratio
[125I]10	1.1
[125I]11	1.3
[125I]12	1.0
[125I]21	3.2
[125I]22	6.2
[125I]23	1.3
[125I]BIP-NMe2	7.1
[125I]IMPY	1.3