Evaluation of microcirculation of free flaps of the lower leg by contrast harmonic imaging (CHI) with time intensity curve (TIC) analysis. - Prantl, L.; Schreml, S.; Walter, M.; Kasprzak, P.; Stehr, A.; Nerlich, M.; Feurbach, S.; Jung, E. M. (Clinical Hemorheology & Microcirculation, 2008)