Did you download the .pdf by the way? What did you think of it (are you an "x-ray" man)?
The tubes have not really changed much, but the digital side of things has really moved on since "my day". Back then we were suitably impressed with the Siemens "Exposure Points".
Nowadays there is stuff like the Deviation Index in Digital Radiography, for example. All very interesting, and aimed at consistent image quality and (or course) the ALARA principle.
Here's an easy one for you, Malcolm:-
DI :: Deviation Index
EI :: Exposure Index
EIt :: Target Exposure Index
DI = 10xLog10(EI/EIt) ... per IEC 62494
Example results range from something like -3 to +3, with -3 indicating severely under-exposed (try again using twice the mAs) and +3 indicating severely over-exposed (repeat using half the mAs). DI = zero is the perfect exposure being aimed for.
