What are the two settings ultrasound that are used in a therapeutic setting?

There are two types of therapeutic ultrasound: thermal and mechanical.

What is the difference between 1 and 3 MHz setting on the ultrasound?

Therefore, 1-MHz continuous ultrasound, with a half-value depth of approximately 2.3 cm, is frequently used to treat deep tissues that are approximately 2.3 to 5 cm deep. With its smaller half-value depth, 3-MHz ultrasound is frequently used to heat tissues that are more superficial, from 0.8 to 1.6 cm deep.

What frequency does therapeutic ultrasound use?

Therapeutic ultrasound has a frequency range of 0.75–3 MHz, with most machines set at a frequency of 1 or 3 MHz. Low‐frequency ultrasound waves have greater depth of penetration but are less focused.

What are the parameters of ultrasound?

The normal human sound range is from 16 Hz to something approaching 15-20,000 Hz (in children and young adults). Beyond this upper limit, the mechanical vibration is known as ultrasound. The frequencies used in therapy are typically between 1.0 and 3.0 MHz (1 MHz = 1 million cycles per second).

What is intensity in ultrasound?

Intensity is the rate at which energy passes through the unit area and is an important quantity when discussing bioeffects and safety. The average intensity is equal to the power of an ultrasound beam, normally expressed in mW, divided by the cross-sectional area of the beam, expressed in cm2.

What is W cm2 in ultrasound?

Intensity (W/cm2). This is the power of the sound energy and drives temperature effects. The higher the power and intensity, the shorter the treatment time to produce a thermal effect.

What depth can the ultrasound penetrate with a frequency of 2.5 MHz?

Frequency is measured in megahertz (MHz) and can range from . 8 up to 3 MHz. 1 MHz can penetrate from 2.5 cm up to 5 cm within the tissue, while 3 MHz reaches up to a 2.5 cm depth.

How is ultrasound intensity calculated?

The intensity I of the ultrasonic wave is determined from the temperature increase measured at the rear side of an absorber. 3.1.

How do you document an ultrasound?

Documentation

  1. Subjective: Specifically, some statement from the patient which includes their opinion on their pain, function, swelling, motion restriction, skin condition and/or response to previous treatment.
  2. Objective: Patient consent, position, treatment area, frequency, intensity, duration, time.

What is B mode sonography?

B-Mode is a two-dimensional ultrasound image display composed of bright dots representing the ultrasound echoes. The brightness of each dot is determined by the amplitude of the returned echo signal.

What is the wavelength of a 5 MHz transducer?

0.31 mm
For instance, in soft tis- sue with a speed of 1540 m/s, a 5-MHz frequency has a wavelength in tissue of λ = c / f; 1540 m/s ÷ 5,000,000/s = 0.00031 m = 0.31 mm.

What is duty factor in ultrasound?

Duty Factor = Pulse Duration X Pulse Repetition Freq. Pulse Duration. Pulse Repetition Period. Spatial Pulse Length. distance in space traveled by ultrasound during one pulse.