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Hybrid Phase ordering with Automatic Window Selection (HybridPAWS) improves respiratory-navigator efficiency during 3D late-gadolinium enhancement CMR in patients with chronic heart failure and irregular respiratory pattern

Authors
Journal
Journal of Cardiovascular Magnetic Resonance
1097-6647
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Volume
14
Identifiers
DOI: 10.1186/1532-429x-14-s1-p256
Keywords
  • Poster Presentation

Abstract

Hybrid Phase ordering with Automatic Window Selection (HybridPAWS) improves respiratory-navigator efficiency during 3D late-gadolinium enhancement CMR in patients with chronic heart failure and irregular respiratory pattern POSTER PRESENTATION Open Access Hybrid Phase ordering with Automatic Window Selection (HybridPAWS) improves respiratory- navigator efficiency during 3D late-gadolinium enhancement CMR in patients with chronic heart failure and irregular respiratory pattern Zhong Chen*, Christoph Kolbitsch, Jouke Smink, James Harrison, Valentina O Puntmann, Eike Nagel, Reza Razavi, Aldo Rinaldi, Tobias Schaeffter From 15th Annual SCMR Scientific Sessions Orlando, FL, USA. 2-5 February 2012 Summary Hybrid Phase ordering with Automatic Window Selec- tion (HybridPAWS) improves respiratory-navigator effi- ciency during 3D late-gadolinium enhancement CMR in patients with chronic heart failure and irregular respira- tory pattern. When there is a low gating efficiency (<40%) observed with standard respiratory-gated method, HybridPAWS technique resulted in a signifi- cantly greater improvement in navigator efficiency. Background Three-dimensional (3D) inversion recovery cardiac mag- netic resonance (CMR) imaging is beginning to be uti- lised to characterise areas of late gadolinium enhancement (LGE) with high spatial resolution. This is important for tissue heterogeneity assessment in heart failure patients. The 3D CMR data are acquired during free breathing with the application of a respiratory navi- gator. However, a major challenge of its wider clinical application is the prolonged acquisition time in patients with irregular respiratory breathing pattern (Figure 1). The increased scan time can accentuate the effect of contrast kinetics on the quality of LGE-CMR images. In order to improve respiratory gating efficiency, we have implemented interleaved Radial Phase Encoding-Phase ordering with Automatic Window Selection for a Carte- sian sampling scheme (HybridPAWS). With this Hyb

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