Best CT for heart scan? Tosh Aquilion One or Siem Flashspeed

max23 · Joined: 30 Aug 2009 Posts: 1

for heart CT angiography:

Toshiba Aquilion ONE 320-slices

or

Siemens SOMATOM Definition Flash dual source
(claim to do heart scan with only 1 millisievert (mSv))
Moving beyond the simple adding of detector rows, the SOMATOM Definition uses two X-ray sources and two detectors at the same time.
http://www.medicalnewstoday.com/articles/143895.php

Which would have better picture and less x-ray exposure?

Thanks!