Thanks for your thoughts ladies, Suse I am over the bad attitude from the Dr, realistically he must have felt that I would exceed the weight limit for the machine and you come across people with bad bedside manners every day so it's his problem not mine

AJ - thanks for that, I sort of thought that just your head would poke in and out of the machine. I find it very hard to lie flat on my back because of my damaged back/neck and also the weight of my tummy on my chest - ha ha that does not sound right but perhaps you know what I mean. It is very amazing the medical technology available to us now, and for that I am great- full. Now I am not going to spend any more time in worry about it, and wait until the app arrives and just get on with it!