Assessing Coronary Sinus Blood Flow in Patients with Coronary Artery Disease: A Comparison of Phase-Contrast MR Imaging with Positron Emission Tomography. - Koskenvuo,J.W.; Hartiala,J.J.; Knuuti,J.; Sakuma,H.; Toikka,J.O.; Komu,M.; Saraste,M.; Niemi,P. (Am J Roentgenol, 2001)