| Zugriffsnummer | 48684 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Advanced design of MRI inversion pulses for inhomogeneous field conditions by optimal control |
| Autor(in); Institution |
Graf, C.; Institute of Medical Engineering, Graz University of Technology, Graz, AUSTRIA
Soellradl, M.; Institute of Medical Engineering, Graz University of Technology, Graz, AUSTRIA
Rund, A.; Institute for Mathematics and Scientific Computing, University of Graz, Graz, AUSTRIA
Stollberger, Rudolf; Institute for Mathematics and Scientific Computing, University of Graz, Graz, AUSTRIA
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| Quelle/Jahr | NMR in Biomedicine:(2022), 16 S. |
| Artikelnummer | e4790 |
| Availability | [online only] |
| ISSN | 1099-1492 (ONLINE) |
| DOI | |
| Zusammenfassung | Non-selective inversion pulses find widespread use in MRI applications, where requirements on them are increasingly demanding. With the use of high and ultra-high field strength systems, robustness to ΔB0 and B1+ inhomogeneities, while tackling SAR and hardware limitations, has rapidly become important. In this work, we propose a time-optimal control framework for the optimization of ΔB0 and B1+ robust inversion pulses. Robustness is addressed by means of ensemble formulations, while allowing inclusion of hardware and energy limitations. The framework is flexible and performs excellently for various optimization goals. The optimization results are analyzed extensively in numerical experiments. Furthermore, they are validated, and compared with adiabatic RF pulses, in various phantom and in vivo measurements on a 3 T MRI system. |
| Kostenfreier Zugang | Open Access Hybrid |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Metrologie in der Medizin |