For Primus, the SNR values exhibited a slight logarithmical increase with increasing kVp (the increase was numerically very small), whereas a strong trend of linear increase in the number of discernible dark and light steps with kVp increase was also observed.
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Digital radiography image quality evaluation using various phantoms and software.
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On the contrary, for SNR, a clear trend of reduction with IAK increase was observed.
Regarding the effect of increasing kVp on the IQ metrics, the following observations were made: For all phantoms, the kVp increase did not seem to affect spatial resolution, except for CDR where HCR (visual evaluation) exhibited a negative trend.