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Published in: Journal of Cardiovascular Magnetic Resonance 1/2021

Open Access 01-12-2021 | Research

Defining the optimal temporal and spatial resolution for cardiovascular magnetic resonance imaging feature tracking

Authors: Sören J. Backhaus, Georg Metschies, Marcus Billing, Jonas Schmidt-Rimpler, Johannes T. Kowallick, Roman J. Gertz, Tomas Lapinskas, Elisabeth Pieske-Kraigher, Burkert Pieske, Joachim Lotz, Boris Bigalke, Shelby Kutty, Gerd Hasenfuß, Sebastian Kelle, Andreas Schuster

Published in: Journal of Cardiovascular Magnetic Resonance | Issue 1/2021

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Abstract

Background

Myocardial deformation analyses using cardiovascular magnetic resonance (CMR) feature tracking (CMR-FT) have incremental value in the assessment of cardiac function beyond volumetric analyses. Since guidelines do not recommend specific imaging parameters, we aimed to define optimal spatial and temporal resolutions for CMR cine images to enable reliable post-processing.

Methods

Intra- and inter-observer reproducibility was assessed in 12 healthy subjects and 9 heart failure (HF) patients. Cine images were acquired with different temporal (20, 30, 40 and 50 frames/cardiac cycle) and spatial resolutions (high in-plane 1.5 × 1.5 mm through-plane 5 mm, standard 1.8 × 1.8 x 8mm and low 3.0 × 3.0 x 10mm). CMR-FT comprised left ventricular (LV) global and segmental longitudinal/circumferential strain (GLS/GCS) and associated systolic strain rates (SR), and right ventricular (RV) GLS.

Results

Temporal but not spatial resolution did impact absolute strain and SR. Maximum absolute changes between lowest and highest temporal resolution were as follows: 1.8% and 0.3%/s for LV GLS and SR, 2.5% and 0.6%/s for GCS and SR as well as 1.4% for RV GLS. Changes of strain values occurred comparing 20 and 30 frames/cardiac cycle including LV and RV GLS and GCS (p < 0.001–0.046). In contrast, SR values (LV GLS/GCS SR) changed significantly comparing all successive temporal resolutions (p < 0.001–0.013). LV strain and SR reproducibility was not affected by either temporal or spatial resolution, whilst RV strain variability decreased with augmentation of temporal resolution.

Conclusion

Temporal but not spatial resolution significantly affects strain and SR in CMR-FT deformation analyses. Strain analyses require lower temporal resolution and 30 frames/cardiac cycle offer consistent strain assessments, whilst SR measurements gain from further increases in temporal resolution.
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Metadata
Title
Defining the optimal temporal and spatial resolution for cardiovascular magnetic resonance imaging feature tracking
Authors
Sören J. Backhaus
Georg Metschies
Marcus Billing
Jonas Schmidt-Rimpler
Johannes T. Kowallick
Roman J. Gertz
Tomas Lapinskas
Elisabeth Pieske-Kraigher
Burkert Pieske
Joachim Lotz
Boris Bigalke
Shelby Kutty
Gerd Hasenfuß
Sebastian Kelle
Andreas Schuster
Publication date
01-12-2021
Publisher
BioMed Central
Published in
Journal of Cardiovascular Magnetic Resonance / Issue 1/2021
Electronic ISSN: 1532-429X
DOI
https://doi.org/10.1186/s12968-021-00740-5

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