Maria Cristina Chammas is currently an assistant and director of the Ultrasound Service, hired by the Hospital das Clínicas of the Faculty of Medicine of the University of São Paulo, and hired by the Faculty of Medicine Foundation. She received her degree in medicine, master’s degree in radiology, and PhD in Radiology from the University of São Paulo in 1989, 1998, and 2002, respectively. She has experience in medical radiology, with an emphasis on ultrasonography, working mainly in ultrasonography in internal medicine with a focus on the liver (especially focal lesions and steatosis), ultrasonography of the head and neck (thyroid, salivary gland, tongue, lymph nodes, etc.), Doppler ultrasound, and ultrasonography with contrast by microbubbles. She is an expert in the use of CEUS to evaluate liver lesions and liver transplantation, kidney lesions and transplantation, breast lesions, and vascular conditions. She is also one of the pioneers of the use of CEUS in Brazil and Latin America in the radiology discipline. She is the past President of the World Federation for Ultrasound in Medicine and Biology (WFUMB) and formerly served as President of FLAUS (Latin American Federation of Ultrasound).