Statistical analysis of IHC data using i-Solution software.

<p>Five random visual fields were selected in each section and then were taken pictures of by camera. The pictures were analyzed by i-Solution software, and the positive area and the whole area of each picture were calculated. The protein level of Nrf2, Mrp1 and NQO1 was expressed as ratio of positive area to whole area. (A) The different expressing levels of Nrf2, Mrp1 and NQO1 in the four cancers were compared. (B) The correlation analysis was performed by SPSS between Nrf2, Mrp1 and NQO1 by twos.