Ultrasound of the biliary system

Ana Paula Barreiros, Alina Popescu, Julie Walton, Cui Xinwu, Christoph F. Dietrich Department of Internal Medicine 1, Johannes Gutenberg-University Mainz, Germany Department of Gastroenterology, University of Medicine and Pharmacy Timisoara, Romania. Faculty of Health and Life Sciences, University of Liverpool, UK. Department of Internal Medicine 2, Caritas Krankenhaus Bad Mergentheim, Germany Acknowledgment: The authors thank Michael Hocke for peer review of the manuscript.