A calibration system for an image plate used to detect high-energy particles produced by a radioisotope includes a casing and an image plate holder disposed at least partially inside the casing. The image plate is retained by the image plate holder inside the casing. A calibration source generates energy inside the casing to prepare the image plate for detection.
FEDERAL RESEARCH STATEMENT
 This invention was made with Government support under Contract No. DE-AC09-085R22470, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.