Emilija Miskinyte, MD and co-workers from German Heart Center, Berlin, Germany under the supervision of Prof Sebastian Kelle, MD validated the new Medis QStrain application for CT against the QStrain for MR, both based on feature tracking (FT) and also against the gold standard of CMR tagging in a population of 27 patients with severe aortic stenosis. The parameters Global Longitudinal Strain (GLS) and Global Circumferential Strain (GCS) were compared between the different techniques. They found that the CT and MR FT approaches correlated closely for GLS and GCS, respectively, but moderately with tagging for GCS. The inter- and intra-observer variabilities were excellent for all techniques. The authors concluded that, in elderly patients with severe aortic stenosis (AS), the FT
algorithm performs equally well in CMR and cardiac CT datasets for the assessment of GLS and GCS, both in terms of reproducibility and agreement with the gold standard, TAG.
The results were published in J. Clin. Med. 2019, 8, 1423; doi:10.3390/jcm8091423