This article is the third and last part of a longer contribution regarding the scientific and technological development of neuroimaging in the US. Emphasis is put on the ethics aspect of neuroimaging in the US. Surprisingly neuroimaging in the US is not regulated by the US central authorities. Interdisciplinary Center for Ethics (Yale University) supports the idea that the US is not well equipped for similar initiative. Regulation is expected to be generated at the state level. Most cited ethics issues in the US address interpretation of the data, data protection and privacy, and data exploitation.