RT Journal Article SR Electronic T1 Nomenclature for Fourier Transforms of Spread Functions of Imaging Systems Used in Nuclear Medicine JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 704 OP 705 VO 13 IS 9 A1 Robert N. Beck YR 1972 UL http://jnm.snmjournals.org/content/13/9/704.abstract AB