RT Journal Article SR Electronic T1 A Boundary Method for Attenuation Correction in Positron Computed Tomography JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 627 OP 637 VO 22 IS 7 A1 Huang, Sung-Cheng A1 Carson, Richard E. A1 Phelps, Michael E. A1 Hoffman, Edward J. A1 Schelbert, Heinrich A. A1 Kuhl, David E. YR 1981 UL http://jnm.snmjournals.org/content/22/7/627.abstract AB