@inbook{6914902, author={Brian P. Barrick and Mihai V. Podgoreanu and Edward K. Prokop}, editor={Mathew, Joseph P. and Swaminathan, Madhav and Ayoub, Chakib M.}, title={Chapter 1. Physics of Ultrasound Imaging}, booktitle={Clinical Manual and Review of Transesophageal Echocardiography, 2e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2010}, url={accessanesthesiology.mhmedical.com/content.aspx?aid=6914902} }