From the PACs that I manage ...
Old tubes aside, what technologies are you using on the CR (or DR) side of things?
As you know, in general terms x-ray bean quality is determined by kVp ... and (in theory at least) a degraded tube should still be useful (up to a point) with modern image receptors and DI (
etc.) software. In other words, modern systems can produce quality radiographic images almost regardless of how clumsy the radiographer (that is, less than optimal factors being set at the control panel). That's the beauty of the modern digital system.
However, I recall that various manufacturers came up with their own approaches to Exposure Indexing. I am hoping that by now IEC 62494 has introduced some badly needed standardisation and conformity.
Meanwhile,
medDream looks interesting. I include the link as a point of reference; and it also contains a fair amount of (hopefully relevant) information.
