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General Chemistry

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Applications of Radioactive Tracers

CHEM-YRPIDW

Which of the following tracers is cleared out fastest from the body?

Nuclide Half-Life Area of the Body Studied
$_{}^{ 131 }{ I }$ 8 days Thyroid
$_{}^{ 24 }{ Na }$ 15 hours Circulatory System
$_{}^{ 99m }{ Tc }$ 6 hours Heart, Bones, Liver and Lungs
$_{}^{ 87 }{ Sr }$ 2.8 hours Bones
$_{}^{ 32 }{ P }$ 14.3 days Eyes, Liver and Tumors
$_{}^{ 99 }{ Mo }$ 66 hours Metabolism
A

$_{}^{ 24 }{ Na }$

B

$_{}^{ 99 }{ Mo }$

C

$_{}^{ 87 }{ Sr }$

D

$_{}^{ 99m }{ Tc }$