I know in general, not specifically in radiology, recent years have seen an increase in applications sent per applicant, interviews attended per applicant, and programs ranked per applicant. At the same time, the match rate has been stable but the average rank at which people match is lower. I posit these are related, as people are applying more promiscuously, which to some degree translates to ranking more reach programs.
In radiology specifically, we also see an increase in applications per applicant, so my conjecture is that there is a similar phenomenon in which the match will be lower on the rank list on average. We will never know whether this is true until the NRMP releases the statistics for specialty-specific match by rank position.