Vshirley: my procedure had a built in MRI so they were seeing my prostate in real time while they did the procedure. When they use fused images they increase the margins to make up for the fused image real-time trade off.

Although my markers were not required, since my RO was putting the spaceoar in anyway, she put markers in as a backup in case there was a maintenance issue with the machine but all went well and I did not mind that as it struck me as being on the cautious side.

They did a ct scan and an mri on the machine, pre-treatment, for initial mapping and then final mapping in real time.

Glad you are only doing 5 treatments. You might want to have your radiation oncologist prescribe Flomax to you ahead of time so that you have it available immediately if you need it. For me, after the third hypo-fractional treatment, I needed it and got relief overnight regarding urine flow, but was never in any pain.

Good luck next week.