TY - JOUR AU - Brian Zimmerman C2 - Applied Radiation and Isotopes DA - 2012-09-23 DO - https://doi.org/10.1016/j.apradiso.2012.09.011 LA - en M1 - 76 PB - Applied Radiation and Isotopes PY - 2012 TI - Current status and future needs for standards of radionuclides used in Positron Emission Tomography ER -