Cross Platform Normalization of Gene Expression Values

Question

[richarashmivats]

Hello, everyone. I am facing a problem in my project. I am trying to use the gene expression values submitted by authors along with their samples on GEO database . I want to compare these values but these values are calculated from different platforms using different data processing techniques. How can I normalize them in order to get a set of gene expression values which are on the same level , and can be easily compared . Please suggest something.

[mrtz.milani]

Did you find the answer? I think using .CEL files with MAS5 Signal intensity would do the job. Correct me if I am wrong.