155Tb production by cyclotrons: what level of 155Gd enrichment allows clinical applications?

EJNMMI Physics

Table 2 ^xxxTb radioisotopes yields (MBq/µA·h) for different ¹⁵⁵Gd-enriched targets at the EoB, 72, and 96 h after

Target enrichment	¹⁵⁵Tb	^156gTb	^156m1Tb	^156m2Tb	^154gTb	^154m1Tb	^154m2Tb
¹⁵⁵Gd-100% [EoB]	4.383	0.0027	0.0013	0.0121	0.0293	0.121	0.0
¹⁵⁵Gd-99% [EoB]	4.3424	0.03743	0.0217	0.05467	0.0290	0.120	0.0
¹⁵⁵Gd-98% [EoB]	4.3021	0.07209	0.04214	0.0972	0.0287	0.119	0.0
¹⁵⁵Gd-91.90% [EoB]	4.04829	0.2123	0.12422	0.2682	0.07016	0.274	0.008
¹⁵⁵Gd-100% [72 h]	2.9648	0.00239	0.00017	9.85E-07	0.00479	0.0006	0.0
¹⁵⁵Gd-99% [72 h]	2.9375	0.02977	0.00281	4.4496E-06	0.00475	0.0006	0.0
¹⁵⁵Gd-98% [72 h]	2.910	0.0571	0.0054	7.914E-06	0.004698	0.0006	0.0
¹⁵⁵Gd-91.90% [72 h]	2.73853	0.16776	0.01144	2.183E-05	0.01125	0.0013	0.0009
¹⁵⁵Gd-100% [96 h]	2.6026	0.002118	8.63E-05	4.26905E-08	0.00224	0.0001	0.0
¹⁵⁵Gd-99% [96 h]	2.57866	0.02639	0.0014	1.928E-07	0.00222	0.0001	0.0
¹⁵⁵Gd-98% [96 h]	2.5547	0.05067	0.00276	3.4296E-07	0.002196	0.0001	0.0
¹⁵⁵Gd-91.90% [96 h]	2.40399	0.14878	0.00812	9.4601E-07	0.00526	0.0002	0.0004