This is a technical paper from Juergens KW et al from Munster, in the January issue of European Radiology, trying to examine whether increased temporal resolution using multi-segment reconstructions from 3, 5 and 7 rotations, improves our ability to assess ejection fraction and volumes as compared to 2-segment reconstruction, using CMR as the gold standard.
They found that it makes no difference and that there is a consistent underestimation of the ejection fraction by 2-5% as compared to CMR. This has been our observation as well and we have found no difference using one-segment or two-segment reconstruction on the 64-slice scanner. We have had two patients so far who have had CMR and cardiac CT performed on the same day and we have found 5% underestimation of the ejection fraction and volumes on CT.
Having said that, both techniques as we know are far superior to echocardiography.