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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Magn Reson Med. 2014 Jul 17;73(6):2212–2224. doi: 10.1002/mrm.25364

Figure 1.

Figure 1

(A) Gradient shape of the Z2 spherical harmonic, short-hand for a circularly symmetric encoding field with spatial variation z2-½(x2+y2). (B) Simulated sensitivities for an eight element circumferential microstrip receiver array. (C) Pulse sequence diagram of the pseudo-random O-space imaging sequence. The sequence is a gradient echo sequence that uses a radial-like progression for the linear strengths and randomizes the Z2 strength within 30% of the nominal O-space strength (D) to increase incoherence for a sparsity-promoting reconstruction.