Lee, R. F., Johnson, G., Grossman, R. I., Stöckel, B., Trampel, R., & McGuinness, G. (2006). Advantages of parallel imaging in conjunction with hyperpolarized helium – A new approach to MRI of the lung. Magnetic Resonance in Medicine, 55(5), 1132-1141. doi:10.1002/mrm.20855.