%0 Journal Article %A David R. Gilland %A Ronald J. Jaszczak %A Kim L. Greer %A R. Edward Coleman %T Transmission Imaging for Nonuniform Attenuation Correction Using a Three-Headed SPECT Camera %D 1998 %J Journal of Nuclear Medicine %P 1105-1110 %V 39 %N 6 %U https://jnm.snmjournals.org/content/jnumed/39/6/1105.full.pdf