Alvard Ter-Karapetyan,Simon M. F. Triphan,Bertram J. Jobst, Angela F. Anjorin, Julia Ley-Zaporozhan,Sebastian Ley, Oliver Sedlaczek, Jürgen Biederer, Hans-Ulrich Kauczor, Peter M. Jakob, Mark O. Wielpütz .Alvard Ter-Karapetyan is from the Vardanants Center for Innovative Medicine, Armenia. Scientists at the Department of Diagnostic and Interventional Radiology at the University Hospital Heidelberg performed a research experiment on Lung MRI, a Quantitative Perfusion MRI of the Lung in COPD. The Problem of Short-Term Repeatability, first author of the scientific article in 2017.