RT Journal Article SR Electronic T1 Bremsstrahlung Imaging Using the Gamma Camera: Factors Affecting Attenuation JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 161 OP 166 VO 33 IS 1 A1 Laurence P. Clarke A1 Shelby J. Cullom A1 Robin Shaw A1 Curt Reece A1 Bill C. Penney A1 Michael A. King A1 Martin Silbiger YR 1992 UL http://jnm.snmjournals.org/content/33/1/161.abstract AB