RT Book, Section A1 Starkey, Chad SR Print(0) ID 1163448161 T1 Therapeutic Ultrasound T2 Therapeutic Modalities, 4e YR 2013 FD 2013 PB F. A. Davis Company PP New York, NY SN 9780803625938 LK fadavisat.mhmedical.com/content.aspx?aid=1163448161 RD 2024/03/28 AB Therapeutic ultrasound is presented in this section rather than in the thermal agents section for two reasons: (1) it is an acoustical modality that uses mechanical energy rather than an electromagnetic or infrared modality and (2) it is a deep-heating agent. In addition, ultrasound is capable of producing mechanical, nonthermal effects in addition to its thermal effects. Also refer to the basic physiological responses to heat described in Chapter 5.