Reproducibility and Changes in Vena Caval Blood Flow by Using 4D Flow MRI in Pulmonary Emphysema and Chronic Obstructive Pulmonary Disease (COPD): The Multi-Ethnic Study of Atherosclerosis (MESA) COPD Substudy   Right-heart MRI with four-dimensional flow assessment helped to demonstrate that chronic obstructive pulmonary disease was not strongly associated with changes in venous flow to the right heart, but emphysema was associated with greater regurgitant flow, especially in the superior and inferior caval veins.       Ozair Rahman, Michael Markl...R. Graham Barr

Editorial: Vena Caval Flow Regurgitation at Four-dimensional Flow MRI: A New Sign for a Hemodynamic Phenotype of Chronic Obstructive Pulmonary Disease and Emphysema? Yeon Hyeon Choe

Determinants of Rejection Rate for Coronary CT Angiography Fractional Flow Reserve Analysis   Both the Assessing Diagnostic Value of Noninvasive FFRCT in Coronary Care, or ADVANCE, cohort and the clinical cohort of more than 10 000 patients showed relatively low rates for technically unsuccessful calculation of CT fractional flow reserve (2.9% and 8.4%, respectively).       Gianluca Pontone, Jonathan R. Weir-McCall...Jonathon Leipsic

Editorial: Coronary CT Angiography Fractional Flow Reserve Analysis: A Practical Tool or a Luxury for Research Centers? Hajime Sakuma