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Medientyp: E-Artikel Titel: Multifrequency reconstruction for frequency‐modulated bSSFP Beteiligte: Slawig, Anne; Wech, Tobias; Ratz, Valentin; Tran‐Gia, Johannes; Neubauer, Henning; Bley, Thorsten; Köstler, Herbert Erschienen: Wiley, 2017 Erschienen in: Magnetic Resonance in Medicine Sprache: Englisch DOI: 10.1002/mrm.26630 ISSN: 0740-3194; 1522-2594 Schlagwörter: Radiology, Nuclear Medicine and imaging Entstehung: Anmerkungen: Beschreibung: <jats:sec><jats:title>Purpose</jats:title><jats:p>Banding artifacts in images acquired by balanced steady‐state free precession (bSSFP) remain a challenge in MRI as they considerably reduce image quality, and diagnostic value deteriorates accordingly. As the steady‐state tolerates small shifts in frequency, it is possible to acquire frequency‐modulated bSSFP. Unfortunately, standard reconstructions of such measurements suffer from signal loss. Our study proposes a multifrequency reconstruction and demonstrates its capability of suppressing banding artifacts while retaining the high signal level of standard bSSFP.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>Numerical simulations in vitro and in vivo measurements were performed using both standard bSSFP and frequency‐modulated bSSFP. The modulated data were reconstructed using a multifrequency approach consisting of three steps: phase correction, multiple reconstructions for different assumed frequencies, and maximum intensity projection.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>Although standard bSSFP measurements showed banding artifacts that compromised the image quality, standard reconstructions of frequency‐modulated acquisitions suffered from signal loss. In contrast, images reconstructed from frequency‐modulated data using the proposed multifrequency reconstruction showed no visual bandings and featured a higher signal‐to‐noise ratio (SNR). The SNR gain for phantom and in vivo measurements ranged from 1.23 to 1.49.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>The presented multifrequency reconstruction for frequency‐modulated bSSFP provides images showing no bandings and featuring high SNR in short scan times. Magn Reson Med 78:2226–2235, 2017. © 2017 International Society for Magnetic Resonance in Medicine.</jats:p></jats:sec>