title: Rf-inhomogeneity compensation using method of Fourier synthesis.
abstract: In this paper, we propose a new method for design of composite pulses that are robust to rf-amplitude (rf-inhomogeneity). We call this, the method of Fourier synthesis. The method is general enough to design excitation, inversion, refocusing or arbitary flip angle pulses that are robust to rf-amplitude. The method can be tailored to have amplitude selective excitation. We experimentally show rf-compensation over a order of magnitude (20db) variation in rf-amplitude. The method is expected to find use in invivo NMR studies using surface coils, where there is large dispersion in rf-amplitude over the sample.
authors.affiliation: Department of Electrical Engineering, IIT Bombay, Powai 400076, India. Electronic address: navinkhaneja@gmail.com.
authors.forename: Navin
authors.initials: N
authors.lastname: Khaneja
keywords: Compensation; Composite pulses; Fourier synthesis; rf-inhomgeneity