- Indirect MR lymphangiography of the head and neck using conventional gadolinium contrast: A pilot study in humans. Loo, B.W., Draney, M.T., Sivanandan, R., Ruehm, S.G., Pawlicki, T., Xing, L., Herfkens, R.J., Le, Q.T. Int. J. Radiat. Oncol. Biol. Phys. (2006)