[BioC] affyQCReport before and after normalization

[Sebastien Gerega]

Hi,
I would like to generate affyQCReports for before and after 
normalization of data. I can obviously generate a QCReport for an 
affyBatch object quite simply but once I have processed the affyBatch 
object as follows:
eset <- rma(affyBatch)
I am unsure about how to get a second QCReport. The rma process would 
have normalized and background corrected the affyBatch object to create 
the exprsSet but how can I access this normalized data to create another 
QCReport?
any help would be greatly appreciated. thanks,
Sebastien