@inbook{55903677,
author={Daquan Xu},
editor={Hadzic, Admir},
title={Chapter 26. Ultrasound Physics},
booktitle={Hadzic's Peripheral Nerve Blocks and Anatomy for Ultrasound-Guided Regional Anesthesia, 2e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2012},
url={accessanesthesiology.mhmedical.com/content.aspx?aid=55903677}
}