For the details of these procedures, click here to download the Radiographic Compliance Guidance Document. They should be replaced when they are no longer functioning properly and do not meet the QC tests listed above. Processor QC tests must be performed on every day radiographs are taken. If no radiographs are taken, even if the office is open, QC tests do not have to be performed. The quality control procedure that monitors the processor is a key procedure and has been written with much detail.
Processing is known to be the weak link in the production of radiographs.
It is the area of quality control that requires the most attention. The photographic film is very sensitive to processing changes. A processor that is out of control can negate the quality control efforts in other areas. The consequence of under processing is higher radiation exposure and film contrast degradation. I have equipment over 20 years old.