RT Journal Article SR Electronic T1 A Fast, Simple, Cheap Radioactive Point Source JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 108 OP 108 VO 9 IS 2 A1 Mark Lanz A1 Gail Erickson A1 Wini Eaton YR 1981 UL http://tech.snmjournals.org/content/9/2/108.1.abstract AB