Question

Tc-99m DTPA does not bind to the brain, a repeat exam can be performed much sooner than with a brain-specific agent. (unlike HMPAO- h, hangs on to the brain)

Answer 1

Tc-99m DTPA does not bind to the brain, allowing repeat exams to be performed sooner than with brain-specific agents like HMPAO.

Step-by-step explanation:

The statement suggests that Tc-99m DTPA, unlike HMPAO, does not bind to the brain. Tc-99m DTPA is a radiopharmaceutical that is used for imaging various organs in the body, including the kidneys and lungs. Its half-life is about six hours, which means it remains in the body for a relatively short time compared to other agents. Since it does not bind to the brain, a repeat exam can be performed much sooner. On the other hand, HMPAO is a brain-specific agent that specifically targets brain tissue and stays in the brain for a longer period of time.