A MICROCOMPUTER-BASED WHOLE-BODY COUNTER FOR PERSONNEL ROUTINE MONITORING

The paper describes a cost-effective NaI(Tl) whole-body counter develo ped for routine examinations of worker intakes at an isotope productio n facility. Signal processing, data analysis and system operation are microcomputer-controlled for minimum human interactions. The pulse hei ght analyzer is developed as an microcomputer add-on card for easy man ipulation. The scheme for radionuclide analysis is aimed for fast runn ing according to a knowledge base established from background samples and phantom experiments in conjunction with a multivariate regression analysis. Long-term stability and calibration with standards and in vi vo measurements are reported.