RT Journal Article SR Electronic T1 Weighted Summation of Oxygen-15-Water PET Data to Increase Signal-to-Noise Ratio for Activation Studies JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 334 OP 340 VO 38 IS 2 A1 Jesper L. R. Andersson A1 Harald Schneider YR 1997 UL http://jnm.snmjournals.org/content/38/2/334.abstract AB