**Author details**

Ana Magdalena Bratu1,2 and Constantin Zaharia1,2\*

1 Department of Radiology and Medical Imaging, "Colţea" Clinical Hospital, Bucharest, Romania

2 "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania

\*Address all correspondence to: czaharia50@gmail.com

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
