Zhipeng Cao1, Christopher T. Sica2,
Philipp Ehses3, Sukhoon Oh2, Yeun C. Ryu2,
Christopher M. Collins1,2, Mark A. Griswold4
A phase-constrained compressed sensing reconstruction method is proposed. It is validated through simulation and experiments to be effective on smooth or focal, mild or dramatic temperature changes for rapid MRI temperature mapping both on phantom and in vivo based on proton resonance frequency shift. The method can also be combined with partially parallel acquisition techniques for additional acceleration.