TY - JOUR T1 - Radiation Safety Review for 511-keV Emitters in Nuclear Medicine JF - Journal of Nuclear Medicine Technology JO - J. Nucl. Med. Technol. SP - 12 LP - 17 VL - 25 IS - 1 AU - Mary Anne Dell Y1 - 1997/03/01 UR - http://tech.snmjournals.org/content/25/1/12.abstract N2 - With the advent of high-energy collimators and dual-head coincidence cameras, standard nuclear medicine facilities will soon begin imaging with PET isotopes. The use of 511-keV emitters raises new radiation safety concerns for technologists traditionally limited to handling 99mTc and other low-energy isotopes. This article is a basic review of positron emitters, measurement concerns, exposure rates, shielding requirements and external radiation exposure mitigation. Newly developed PET shielding products are presented and regulatory status is discussed briefly. ER -