AbstractID: 10136 Title: Real-time Detector Test Most hospitals are already involved in the routine monitoring of radiation either in nuclear medicine and/or radiation oncology. Radiation instruments are used to control exposures, monitor for spills and assess decontamination efforts. The range and variety of instruments on hand vary with the types and uses of materials at the facility. This lecture will review some of these instruments emphasizing their uses and limitations. The lecture will include a real-time test in which participants will be asked to identify a number of unknown radionuclides based on the response of the instruments reviewed earlier. The lecture will conclude with a review of the correct answers and a reemphasis of the limitations of the different instruments. Educational Objectives: 1. Understand the types of instruments that might be used in a radiological emergency. 2. Understand the limitation of these instruments. 3. Use this information to make a real-time evaluation of unknown sources.