| Zugriffsnummer | 48862 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Calibration-free-off-resonance-robust kT-Point Pulses for UHF body MRI |
| Autor(in); Institution |
Krüger, Felix; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
Lutz, Max; 8.1, Biomedizinische Magnetresonanz, PTB-Berlin
|
| Quelle/Jahr | 13th Annual Scientific Symposium on Clinical Needs, Research Promises and Technical Solutions in Ultrahigh Field MR:(2022), 4 S. |
| Konferenzangaben | 13th Annual Scientific Symposium on Clinical Needs, Research Promises and Technical Solutions in Ultrahigh Field MR, Berlin, 9, September 2022, Germany |
| Freie Schlagworte | MRI ; UHF ; parallel transmission |
| Zusammenfassung | MRI in the human body at ultra-high fields (>7T) is highly challenging and typically limited by motion and strong inter-subject variations of the spatial flip-angle (FA) patterns. To overcome these limitations, subject-specific tailored parallel transmission (pTx) or pre-computed universal pulses (UPs) independent of the subject have been recently proposed. In contrast to RF shimming, however, dynamic pTx can be more susceptible to deviations in the main magnetic field (ΔB0), which can be substantial in 7T cardiac MRI. In this work, we demonstrate the feasibility of ΔB0-robust UPs across a 1400-Hertz frequency range that includes water and six fat frequencies to achieve homogeneous flip-angle (FA) distributions throughout the heart in the human body. Code for the pulse design and 3D B1+ datasets are provided under an open-source licence and could serve as a basis for new projects without the need to have access to a 7T scanner. . |
| Themenbereich der Metrologie | Metrologie in der Medizin |
| Förderinformationen (1) |
Förderername: Deutsche Forschungsgemeinschaft (DFG)
Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Förderprogramm: SCHM 2677/2-1 and GRK2260, BIOQIC |
Zitierung
Aigner, C. S., Dietrich, S., Krüger, F., Lutz, M., & Schmitter, S. (2022). Calibration-free-off-resonance-robust kT-Point Pulses for UHF body MRI. 13th Annual Scientific Symposium on Clinical Needs, Research Promises and Technical Solutions in Ultrahigh Field MR, Berlin, 9, September 2022, Germany.