Question

Why can you image tetrofosmin earlier than sestamibi?

A) Tetrofosmin has a shorter half-life than sestamibi.
B) Tetrofosmin has higher myocardial uptake than sestamibi.
C) Tetrofosmin has lower liver uptake than sestamibi.
D) Tetrofosmin has better image resolution than sestamibi.

Answer 1

Tetrofosmin can be imaged earlier than sestamibi due to its lower liver uptake, allowing for clearer images soon after administration.

Step-by-step explanation:

The question relates to the comparison of two radiopharmaceuticals, tetrofosmin and sestamibi, used in nuclear medicine for cardiac imaging. While both are used to image heart muscle, the key difference is that tetrofosmin can be imaged earlier than sestamibi. This is primarily because tetrofosmin has lower liver uptake than sestamibi, which allows clearer cardiac images to be taken sooner after administration. Therefore, the correct answer to why tetrofosmin can be imaged earlier than sestamibi is 'C) Tetrofosmin has lower liver uptake than sestamibi.'