MRI - do I need to go with him?

It will be a multi-parametric MRI (mpMRI). These require specialist radiologists to interpret them, of which there's a shortage. The radiographer who's doing the scan won't be able to tell (and they're not allowed to tell you even in cases where they can see an obvious result). It's exceedingly unlikely to be analysed on the day. In any case, the specialist radiologist doesn't report it back to you, they report it to the multi-disciplinary team (MDT) who will then discuss it at their next weekly meeting, and decide what action to take, at which point the MDT will feed back to you. Typically, there's a 3 week gap between a test procedure, and the following consultation where you get the results and find what happens next, although this particular scan can be rushed through faster as it's on the critical path for the hospital to meet it's diagnosis time targets.

Edited by member 02 Sep 2019 at 09:47  | Reason: Not specified

Here's a map showing the hospitals offering mpMRI and those not.
https://prostatecanceruk.org/about-us/projects-and-policies/mpmri

The ones which say 'not to PROMIS standard' mean they don't offer enough different parametrics which show prostate well for it to be considered a real prostate mpMRI. (Most likely, they are using an old protocol with parametrics that are no longer considered optimal for diagnosis.)

Hospitals which only offer 2 paramentics are no longer allowed to call this multi-parametric (although I don't know if that's reflected in the map - they might show as 'not to PROMIS standard').