Fast online‐customized (FOCUS) parallel transmission pulses: A combination of universal pulses and individual optimization

• Published in: Magnetic resonance in medicine Vol. 85; no. 6; pp. 3140 - 3153
• Main Authors: Herrler, Jürgen, Liebig, Patrick, Gumbrecht, Rene, Ritter, Dieter, Schmitter, Sebastian, Maier, Andreas, Schmidt, Manuel, Uder, Michael, Doerfler, Arnd, Nagel, Armin M.
• Format: Journal Article
• Language: English
• Published: United States Wiley Subscription Services, Inc 01.06.2021
• Subjects: 7 T; Adiabatic; Adolescent; Adult; Algorithms; Brain - diagnostic imaging; Brain Injuries - diagnostic imaging; Case-Control Studies; Circular polarization; Customization; Data acquisition; Datasets; Female; Homogeneity; Humans; Image Processing, Computer-Assisted - methods; kT points; Magnetic resonance imaging; Magnetic Resonance Imaging - methods; Male; Mathematical analysis; Optimization; parallel transmission (pTx); Regularization; SPINS; ultra‐high‐field MRI; universal pulses; Young Adult; kT points; 7 T; parallel transmission (pTx); SPINS; ultra-high-field MRI; universal pulses

Purpose To mitigate spatial flip angle (FA) variations under strict specific absorption rate (SAR) constraints for ultra‐high field MRI using a combination of universal parallel transmit (pTx) pulses and fast subject‐specific optimization. Methods Data sets consisting of B0, B1+ maps, and virtual ob...