The development of technology in the 1920’s using piezoelectric materials and electronic devices fostered the era of high frequency sound in the treatment of human illness and disease. Primarily used in musculoskeletal conditions ultrasound therapy became mainstream in the 1970’s (1). Today 66% of chiropractors utilize ultrasound therapy in their offices (2).
(1) Nyborg WL. Biological effects of ultrasound: development of safety guidelines. Part II: general review. Ultrasound Med Biol 2001 Mar;27(3):301-33.
(2)Christensen M. Job Analysis of Chirpractic. Greeley, Co: National Board of Chiropractic Examiners; 2005.