Adalysis will check your account daily and alert you whenever it finds disapproved image ads. You will see the alert under Audit Alerts / Ads on your Dashboard. 

Click on the alert to review the list of disapproved image ads. You can see the disapproval reason by clicking on the sign in the Disapproval Reason column.

You can then select the ads you want to take action on and chose whether to pause them or delete them by hitting the relevant button at the top of the list.