RT Journal Article SR Electronic T1 Impact Factors in Nuclear Medicine Journals JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1397 OP 1400 DO 10.2967/jnumed.107.041491 VO 48 IS 8 A1 Currie, Geoffrey M. A1 Wheat, Janelle M. YR 2007 UL http://jnm.snmjournals.org/content/48/8/1397.abstract AB The annual Journal Citation Reports includes several statistics and figures, the key figure being journal impact factor. Journal impact factor, despite being widely used, is not well understood. This article aims to provide a broader understanding of impact factors and the implications thereof.