Detection of (154)Eu in patients post (153)Sm-EDTMP therapy using a clinical gamma camera.

Enhancements in radiation detection equipment at border crossings and airports resulted in a report to our institution from a Sm-EDTMP therapy patient who was questioned after triggering radiation alarms. Using a clinical SPECT camera in its service mode, gamma-ray spectroscopy was performed on three patients whose Sm-EDTMP injections were given between 4 mo and 2 y prior to this study. The spectra revealed the presence of high-energy photon peaks characteristic of those from Eu.