PT - JOURNAL ARTICLE AU - Beauchamp, Jon M. AU - Belanger, Martin A. AU - Neitzschman, Harold R. TI - An Unusual Cause of “Doughnut” Sign in Brain Scanning DP - 1975 May 01 TA - Journal of Nuclear Medicine PG - 432--433 VI - 16 IP - 5 4099 - http://jnm.snmjournals.org/content/16/5/432.short 4100 - http://jnm.snmjournals.org/content/16/5/432.full SO - J Nucl Med1975 May 01; 16