The feasibility of using a 238Pu/Be-based in vivo prompt γ NAA
system for the detection of Gd in bone has been investigated. The
results suggest that this system is not feasible for bone-Gd measurement,
given that the MDL of a published XRF system are an
order of magnitude lower. While an excellent system for soft tissue
measurement, the present system has apparent limited utility for
measurements of bone.