Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Pamminger, M; Kranewitter, C; Kremser, C; Reindl, M; Reinstadler, SJ; Henninger, B; Reiter, G; Piccini, D; Tiller, C; Holzknecht, M; Lechner, I; Bauer, A; Klug, G; Metzler, B; Mayr, A.
Self-navigated versus navigator-gated 3D MRI sequence for non-enhanced aortic root measurement in transcatheter aortic valve implantation.
Eur J Radiol. 2021; 137:109573
Doi: 10.1016/j.ejrad.2021.109573
Web of Science
PubMed
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- Co-Autor*innen der Med Uni Graz
- Reiter Gert
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- Abstract:
- OBJECTIVES: To prospectively compare image-quality, reliability and graft sizing of a prototype self-navigated and a navigator-gated non-contrast three dimensional (3D) whole-heart magnetic-resonance-angiography (MRA) sequence with computed-tomography-angiography (CTA) for planning transcatheter-aortic-valve-implantation (TAVI). METHODS: Self- and navigator-gated 1.5 T MRA were performed in 27 patients (aged 83 ± 5 years, 41 % male) for aortic root sizing and coronary ostia height measurements; 15 (56 %) patients underwent additional CTA. Subjective-image quality was graded on a 4-point Likert scale, objective MRA image-quality was assessed by signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). Continuous MRA and CTA measurements were analyzed with regression and Bland-Altman analysis, valve sizing by kappa statistics. RESULTS: Median image-quality as rated by two observers was 1.5 [interquartile range (IQR) 1-3] for self-navigated MRA and 1 [IQR 1-2] for navigator-gated MRA (p = 0.059). SNR and CNR were comparable between MRA sequences (p = 0.471 and 0.445, respectively). Acquisition time was shorter for self-navigated MRA compared to navigator-gated MRA (5.5 ± 1 min vs, 6.5 ± 2 min, p = 0.029). Inter-observer correlation of aortic root measurements was high to very high for both self- and navigator-gated MRA (r = 0.75 to 0.94 and r = 0.85 to 0.96, respectively, all p < 0.0001). Theoretical prosthetic valve sizing of self-navigated MRA and CTA was equivalent (κ = 1). However, in four patients (15 %) one coronary ostium each (right coronary artery 3, left main artery 1) was not clearly definable on self-navigated MRA. CONCLUSION: Self-navigated MRA enables aortic annulus TAVI measurements without significant difference to navigator-gated MRA at shortened acquisition time. Prosthesis sizing by self-navigated MRA measurements is equivalent to navigator-gated MRA and CTA-based choice.
- Find related publications in this database (using NLM MeSH Indexing)
- Aged - administration & dosage
- Aged, 80 and over - administration & dosage
- Aortic Valve - diagnostic imaging, surgery
- Aortic Valve Stenosis - diagnostic imaging, surgery
- Computed Tomography Angiography - administration & dosage
- Female - administration & dosage
- Humans - administration & dosage
- Magnetic Resonance Angiography - administration & dosage
- Magnetic Resonance Imaging - administration & dosage
- Male - administration & dosage
- Reproducibility of Results - administration & dosage
- Transcatheter Aortic Valve Replacement - administration & dosage
- Find related publications in this database (Keywords)
- Transcatheter aortic valve replacement (TAVR)
- Magnetic resonance angiography (MRA)
- Computed tomography angiography (CTA)