Resize image blob at runtime

Hi,

Is there any way to change the size of a blob field (in the detail section) at runtime in Crystal Reports?

My report has one image per page return by a stored procedure. Each image in the report can have a different size so I'd need to be able to change the field of each rendering of the detail section.

Any ideas?

I'm using Cyrstal Reports 2008 and VS2013.

Thanks,

Fergus