TheraTouch® CX2/CX4/EX4
16
ULTRASOUND SPECIFICATIONS
ULTRASOUND THERAPY
PARAMETERS
Ultrasound
Frequency
Expressed in MHz, it is
the frequency of the
ultrasound waves. The
ultrasound frequency
determines the
penetration depth, which
has the largest value at
1 MHz and the lowest
value at 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
Amplitude
Expressed in Watt/
cm², is the quotient of
Ultrasound Power and
Effective Radiation Area.
The ultrasound
output display can be
toggled between Watt
and Watt/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
Frequency
1 MHz*, 3 MHz*
Duty Cycles
10% – 100%, Continuous,
Stepping 10%
Modulation Waveform
Square wave
Beam Max. Intensity
10 W/cm
Pulse Repetition Period
10 ms
Temporal Max Output Power
to Output Power Ratio
1:10
Pulse duration
1 – 9 ms* (set by
Duty Cycle)
Pulse Frequency
100 Hz
Output Power
Duty Factor
≥
80% for 5cm
2
0.5W – 10.0W
Duty Factor
≤
70% for 5cm
2
0.5W – 15.0W
Duty Factor
≥
80% for 1cm
2
0.1W – 2.0W
Duty Factor
≤
70% for 1cm
2
0.1W – 3.0W
Rated output power
10W±20% (5cm²
ultrasound head)
2W±20% (1cm²
ultrasound head)
Output Accuracy
± 20% (for any level
above 10% of max)
Amplitude
Duty Factor
≥
80%
2.0W/cm
2
Duty Factor
≤
70%
3.0W/cm
2
Treatment Timer
0 – 30 min ± 0.1 min
5 cm² Applicator
ERA (Effective Radiation
Area)
5 cm
2
1 cm² Applicator
ERA (Effective Radiation
Area)
1 cm
2
Beam Type for 1 cm
2
& 5 cm
2
Applicators
1 MHz
Collimating
3 MHz
Collimating
BNR (Beam Non-
Uniformity Ratio)
5:1 Maximum
