Here are interesting links on PET / CT /SPECT.
I have seen it reported that the new generation 4 axis machines techniques are capable of detection down to 4.5mm, 3d imaging, ability to differnertiate cancerous from non cancerous etc..
http://news-service.stanford.edu/new...head-0112.html
http://www.medicalimagingmag.com/iss...2005-06_01.asp
http://www.umm.edu/petct/physician_information.html
http://www.medicalnewstoday.com/medi...p?newsid=28116
RB