I have one tomorrow to look for a suspected clot on the lung. I feel much better now so I am optimistic it'll be clear, but I didn't ask the woman who called from the hosiptal what will actually happen. I was surprised that the chest X ray I had at the weekend was so quick and simple, but she told me this will last half an hour. Do I have to stand up and will I have to take off my bra again? (obviously a very important question) I kept all of my clothes on apart from that for the x ray. I'm worried that they'll have to inject me with something radioactive but she did say the risks to me are minimal (am 32 weeks pg). Do I have to keep very still? I don't think I can stand up without moving for half an hour without getting very faint. ANd if they don't find a clot or any explination for the chest pain I had or raised levels of something (somehting with a 'dd' at the beginning of it I think) in my blood, will that be it or will they go looking elsewhere for a clot?