they have then gone on and had a xenon gas mri. this is the xenon getting through normally into their bloodstream from their lungs and the blacker areas are where the xenon gas or oxygen would struggle to get through. it's early days for this study and there are still lots of questions, including exactly what is causing these abnormal lung scans. in the meantime, there aren't many of these specially adapted mri scanners across the country. if this research proves they are worthwhile, it would take some serious investment and several months to scale them up across the nhs. and breathe out... lovely, really good. flo says this was the turning point for her, learning breathing techniques with a respiratory physiotherapist. ijust want you to try and slow... it might take her longer to recover after exercise now, but she's moved up a level in karate. she's not back to normal yet, but thinks she will get there. catherine burns, bbc news.