I had IMRT only and when the gold seeds, or fiduciaries as the tech called them, were placed I asked if I could see the CT scan taken to do the initial location. The fiduciaries are unmistakable on the scan. There is bright light at the location. I do not know what the radiation seeds look like so I cannot comment on them. You might ask if you can see the films of the placement of the seeds and fiduciaries.
At least you radiation tech had the good sense to call off the treatment. I am sure you have read the latest on the VA in PA.
Best of luck to you.