Tracing an Unhandled Suspect Lesion Through a Gamma Probe

: This article describes the efforts of the authors in developing a handheld gamma detection probe and addresses a tentative surgical protocol for tracing an unhandled suspect lesion through an albumine‐aggregate 99Tcm tracer operative mapping. The electronic and software design for the system is discussed as well as its electronic and nuclear calibration. A phantom model mimicking a breast was built in order to help in the calibration of the system. Earliest results in an external detection procedure using the model and a 0.3 ml tracer sample (7 MBq activity) are presented.