Pertinent clarification, none of the digitized x-ray generators have automatic exposure control.
Digitization is indirect (CR) and was done with Agfa and Fuji systems
We have a single device Konica Minolta, it do not use 1412/13/14 dicom fields
Hi, I hope you don't mind me saying this but this forum is the wrong group of people for your radiation exposure settings. It sounds as if you have a different screen combination than with film and you should be using a medical physics expert to investigate the exposure parameters. In the UK this is a legal requirement. It is also reportable to the enforcement authority when a patient is under or over-exposed.
If you do not have a medical physicist to hand, then you need to study the previous and current screen "speeds".