RT Journal Article SR Electronic T1 Unusual Flood Field Image JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 213 OP 214 VO 5 IS 4 A1 Appledorn, C. R. A1 Hallberg, J. R. A1 Knight, R. L. YR 1977 UL http://tech.snmjournals.org/content/5/4/213.abstract AB Nuclear medicine is experiencing increasing implementation of quality control programs for instrumentation. No doubt nuclear medicine is benefiting from this development and will continue to do so, provided certain pitfalls are avoided. One such pitfall, an unusual cause for flood field nonuniformity, is reported.