Which of the following radio limitations can mean a receiver is near the limit of its transmission range?

When a patient receives bone marrow stem cells from a donor, he has received which kind of transplant?

A) allogeneic B) autologous C) lobar lung D) platelet

A bone density scan or ________ is a special kind of low-radiation X-ray that shows changes in the rays' intensity after passing through bone.

A) X-ray B) PET scan C) DEXA scan D) MRI