DLP PCI Scanned documents - Hand Written information

Hi There,

Figured I would post this here for any method of capturing this particular information.

Background:
We currently have inbound/oubound PCI DSS information moderated, subject to not being PCI emails will be released. 

Limitation:

We have come across, that particular attachments which have handwritten (scanned) PCI information do not get processed by any of these rules.

So this is where I post the question - Any success in implementing such policy or workaround?

Thanks,

Bill