Improved localization of a “hot spot” in the lungs for an array of four HPGe detectors-the simultaneous use of two gamma energies

An average error of only 9.5%, can be obtained when using this information for detection of a natural uranium point source in the lungs, when the analysis is based on either the 186 or the 92 keV peaks. In the present paper it is shown that the uncertainty can be further reduced to about 3.8%, if the two gamma energy peaks (186 and 92 keV) are analyzed simultaneously for the localization of the uranium point source.