Superiority of prone position in free-breathing 3D coronary MRA in patients with coronary disease

Matthias Stuber, Peter G. Danias, Rene M. Botnar, Daniel K. Sodickson, Kraig V. Kissinger, Warren J. Manning

    Research output: Contribution to journalArticle

    Abstract

    Navigator-gated and corrected 3D coronary MR angiography (MRA) allows submillimeter image acquisition during free breathing. However, cranial diaphragmatic drift and relative phase shifts of chest-wall motion are limiting factors for image quality and scanning duration. We hypothesized that image acquisition in the prone position would minimize artifacts related to chest-wall motion and suppress diaphragmatic drift. Twelve patients with radiographically-confirmed coronary artery disease and six healthy adult volunteers were studied in both the prone and the supine position during free-breathing navigator-gated and corrected 3D coronary MRA. Image quality and the diaphragmatic positions were objectively compared. In the prone position, there was a 36% improvement in signal-to-noise ratio (SNR; 15.5 ± 2.7 vs. 11.4 ± 2.6; P < 0.01) and a 34% improvement in CNR (12.5 ± 3.3 vs. 9.3 ± 2.5, P < 0.01). The prone position also resulted in a 17% improvement in coronary vessel definition (P < 0.01). Cranial end-expiratory diaphragmatic drift occurred less frequently in the prone position (23% ± 17% vs. 40% ± 26% supine; P <0.05), and navigator efficiency was higher. Prone coronary MRA results in improved SNR and CNR with enhanced coronary vessel definition. Cranial endexpiratory diaphragmatic drift also was reduced, and navigator efficiency was enhanced. When feasible, prone imaging is recommended for free-breathing coronary MRA.

    Original languageEnglish (US)
    Pages (from-to)185-191
    Number of pages7
    JournalJournal of Magnetic Resonance Imaging
    Volume13
    Issue number2
    DOIs
    StatePublished - 2001

    Keywords

    • Free-breathing 3D coronary MRA
    • Magnetic resonance imaging
    • Navigator

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging

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