Page 60 of 72 EN109-1498751-47 IFU
Ultrasound parameters
Ultrasound Frequency, expressed in MHz, is the frequency of the ultrasound waves. The ultrasound
frequency determines the penetration depth, which has the largest value at 1 MHz. The ultrasound
frequency can be set at 1 MHz or 3 MHz.
Duty Cycle, expressed in %, defines the ratio of the pulse duration to the pulse repetition time.
Ultrasound can be applied in pulsed or in continuous mode. When the Duty Cycle is set to 100%, the
apparatus operates in continuous mode.
Effective Radiation Area (ERA) expressed in cm², defines the cross-sectional area of the ultrasound
beam (See technical specifications for details). The Effective Radiation Area is fixed and defined by the
size of the ultrasound applicator.
Ultrasound Power is the ultrasound output expressed in W. The ultrasound output display can be
toggled between W and W/cm². In pulsed mode the power during the pulse is displayed. The time
averaged power can be obtained by multiplying this value with the Duty Cycle.
Ultrasound Amplitude, expressed in W/cm², is the quotient of Ultrasound Power and Effective
Radiation Area. The ultrasound output display can be toggled between W and W/cm². In pulsed mode
the Amplitude during the pulse is displayed. The time-averaged Amplitude can be obtained by
multiplying this value by the Duty Cycle.
Ultrasound parameters:
f Acoustic working frequency: 1MHz or
3MHz
f
p
Pulse repetition rate: 16, 48 and 100 Hz
dc Duty cycle: 5 – 80 %
t Pulse duration: 0.5 – 8 ms, set by duty
cycle
RTPA 20 – 1.25
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