[en] Described are newly developed wound-counting systems which provide a high sensitivity for the detection and quantification of X-ray emissions from wounds contaminated with plutonium or americium; and for the location of deposition of radioactive material within a wound, as required by surgery. The systems are used in the medical facility at the Rocky Flats Plant. Work efforts over the past 20 years have concentrated on improving detection limits by reducing and stabilizing the background counting rate. The developments over the last three years have resulted in a family of instruments with excellent operational characteristics, complementary package design, easy maintenance, and reliable operation. A 13-stage photomultiplier tube system is used