I think it would be worth you asking for a full print out of the PSA history as it just doesn't make any sense to go from 0.7 in Spring 2017 to 0.01 at the next test and men simply don't see a PSA of 0.01 after brachy unless they are on hormone treatment. If the decimal point has got a bit muddled and the readings went 0.78, 0.76, 0.7, 0.1, 0.1, 0.1, 0.5, 0.7, 0.9, 1.1 that would be a classic trend post-brachy.