Table 3.

Classification of diathermy.

	Ultrasound	Shortwave diathermy			Microwave diathermy
					Decimeter wave		Centimeter wave	Millimeter wave
Wavelength	/	22.12 m	11.06 m	7.37 m	0.69 m	0.33 m	0.1225 m	0.008 m
Frequency	0.8–3.0 MHz	13.56 MHz	27.12 MHz	40.68 MHz	433.92 MHz	915 MHz	2450 MHz	37.5 GHz