November 2010 issue
Cover illustration: Dual-energy contrast STXM images of a human cervical carcinoma cell scanned at the Fe L-edge: 703.1 eV and 706.3 eV (see Zhang, Xu, Tai, Zhen, Wang, Guo, Yan, Chang, Wang, Li, Zhao and Gao, pages 804-809). The coloured areas indicate the existence of ferroferric oxide within the cell, and the colour bar reflects its relative concentration. The right-hand image resulted from the conventional subtraction-contrast method, while the left-hand image resulted from the new ratio-contrast method. It is easily seen that some pseudo information on the ferroferric oxide distribution has been eliminated using the new method as indicated by the ellipses.