Section 120.532 - Possession, Use, and Calibration of Instruments Used to Measure the Activity of Unsealed Radioactive Material(A) For direct measurements performed in accordance with 105 CMR 120.534, a licensee shall possess and use instrumentation to measure the activity of unsealed radioactive materials prior to administration to each patient or human research subject.(B) A licensee shall calibrate the instrumentation required in 105 CMR 120.532(A) in accordance with nationally recognized standards or the manufacturer's instructions.(C) A licensee shall retain a record of each instrument calibration required by 105 CMR 120.532 in accordance with 105 CMR 120.590(F).Amended by Mass Register Issue 1480, eff. 10/14/2022.