Ramer · Alavi Nuclear Medicine Technology

424 Instrumentation and Quality Assurance50) If the distance between 2 point sources placed on thecamera surface is 35 mm, and the number of pixelsbetween their activity profile peaks is 52 in the x axisand 55 in the y axis, are the pixel dimensions in the xand y direction within 0.5 mm of one another?a. yesb. no51) A technologist measures a standard of known activityin the dose calibrator three times. She subtracts backgroundfrom each measurement and compares thesemeasurements to the decay corrected activity of thestandard. This was a test of:a. constancyb. linearityc. accuracyd. geometric dependence52) Records of dose calibrator checks must be kept for:a. 3 yearsb. 5 yearsc. 10 yearsd. as long as the license is valid53) Survey meters must be calibrated:a. before first useb. annuallyc. following repaird. all of the above54) Survey meters must be checked for proper operationagainst a sealed source:a. before each day of useb. weeklyc. monthlyd. every six months