Question

Ga-67 imaging may be performed with which of the following collimators?

1) Low-energy all-purpose collimator
2) Medium-energy all-purpose collimator
3) High-energy all-purpose collimator
4) Pinhole collimator

Answer 1

For Ga-67 imaging, a medium-energy all-purpose collimator is typically used to accommodate the intermediate gamma-ray energies emitted by this radioisotope. Correct option is 2)

Step-by-step explanation:

Ga-67 imaging is a nuclear medicine procedure that uses the radioisotope Gallium-67 for diagnostic imaging. The choice of collimator is important for acquiring clear images and is based on the energy levels of gamma rays emitted by the radioisotope. For Ga-67, a medium-energy all-purpose collimator is generally the appropriate choice. This type of collimator is designed to manage the intermediate gamma-ray energies of Ga-67. Low-energy collimators are not ideal due to the higher energies of Ga-67 gamma rays, and high-energy collimators are typically reserved for isotopes emitting higher energy levels than Ga-67. The pinhole collimator is specialized for small field of view and higher resolution but is not the standard for Ga-67 imaging.