Real-time phase-contrast flow MRI of the ascending aorta and superior vena cava as a function of intrathoracic pressure (Valsalva manoeuvre). - KOWALLICK, J. T.; JOSEPH, A. A.; UNTERBERG-BUCHWALD, C.; FASSHAUER, M.; VAN WIJK, K.; MERBOLDT, K. D.; VOIT, D.; FRAHM, J.; LOTZ, J.; SOHNS, J. M. (British Journal of Radiology, 2014)