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EN109-1631750-48 IFU
13
Specifications
Continuous ultrasound
Ultrasound parameters:
Ultrasound frequency 1MHz or 3MHz
Pulsed ultrasound
Ultrasound parameters:
f
p
Pulse frequency, 16, 48 and 100 Hz
t
Pulse duration, set by duty cycle 5
–
80 %
t
0.5
–
8 ms
RTPA
20
–
1.25
Description of 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. The
duty cycle describes the pulsed modes of ultrasound. The lower the percentage, the lower temporal
average intensity. 100% is continuous ultrasound. There are 6 settings available: 5, 10, 20, 33, 50 and
80%.
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 with the Duty Cycle.
