Analyzing Myocardial Torsion based on Tissue Phase Mapping MRI
Teodora Chitiboi 1,2 , Susanne Schnell 2 , Jeremy Collins 2 , James Carr 2 , Horst Hahn 1 , and Michael Markl 2
Fraunhofer MEVIS, Bremen, Bremen, Germany,
Northwestern University, Chicago, IL, United States
This work presents a novel, robust approach to compute
myocardial torsion from Tissue Phase Mapping (TPM) MRI,
capable of capturing transmural twisting patterns. A
high resolution temporal velocity field of the heart
muscle is acquired for three short-axis TPM slices, from
which the average rotational velocity is computed.
Torsion is quantified as the difference in rotational
motion between heart slices over time, normalized by
slice distance. Torsion parameter is compared with
domain expert assessment of ejection fraction, delayed
enhancement and wall motion abnormalities for
cardiomyopathy patients and healthy volunteers showing
potential for predicting cardiac contraction problems.
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