ERS rod sources and Pen Point Markers are calibrated by direct comparison of standardized solutions traceable to the National lnstitute of Standards and Technology (NIST), in an identical geometry, using a pressurized ion chamber with ±5% accuracy.
ERS spot markers are used for a range of purposes including patient orientation during a camera study, gamma camera calibration and quality control, gamma probe and Nal detectors calibration and performance check.
Co-57 flood sources are intended to produce uniform radiation fıeld across the camera’s usable field of view with the method’s of NEMA NU-1-2007 to evaluate the gamma camera uniformity.