RT Journal Article SR Electronic T1 Reply: Adequate Evaluation of Image Registration in Hybrid PET/CT JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1557 OP 1558 VO 47 IS 9 A1 Klaus Brechtel A1 Thomas Beyer YR 2006 UL http://jnm.snmjournals.org/content/47/9/1557.abstract AB