Abstract: | This paper was published online on 10 October 2008 (DOI: 10.1002/pat.1279 ) and appears in the January 2009 issue (Vol. 20, No. 1, pp. 48‐57). The following changes should be recognized: The second corresponding author should be changed to M. Rafiena. ** Correspondence to: M. Rafienia, Medical Physics and Medical Engineering Department, Isfahan University of Medical Sciences (IUMS), P.O. Box 81744‐176, Isfahan, Iran. E‐mail: m_rafienia@med.mui.ac.ir |