Strontium-90   0.01   0.0001

Strontium-91   10   0.1

Strontium-92   10   0.1

Sulphur-35   10   0.1

Tantalum-182   1   0.01

Technetium-96   10   0.1

Technetium-97m   10   0.1

Technetium-97   10   0.1

Technetium-99m   100   1.

Technetium-99   1   0.01

Tellurium-125m   1   0.01

Tellurium-127m   1   0.01

Tellurium-127   10   0.1

Tellurium-129m   1   0.01

Tellurium-129   100   1.

Tellurium-131m   10   0.1

Tellurium-132   1   0.01

Terbium-160   1   0.01

Thallium-200   10   0.1

Thallium-201   10   0.1

Thallium-202   10   0.1

Thallium-204   1   0.01

Thulium-170   1   0.01

Thulium-171   1   0.01

Tin-113   1   0.01

Tin-125   1   0.01

Tungsten-181   1   0.01

Tungsten-185   1   0.01

Tungsten-187   10   0.1