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Calculation of therapy time with<br />
pulsed <strong>probes</strong><br />
Energy output and treatment time are the<br />
only parameters that can be set with superpulsed<br />
<strong>probes</strong>, and not the power output. If<br />
you change the frequency on your control<br />
unit, the software automatically calculates<br />
the energy output.<br />
Sample calculation with the pulsed<br />
single probe<br />
The pulsed single probe has a power output<br />
of 90 W with an pulse duration of 100 ns.* If<br />
you want to emit 4 Joules at a frequency of<br />
10 kHz with this probe, the treatment time<br />
will be 44 seconds.<br />
General formulae<br />
time (T) =<br />
average power<br />
output<br />
Pre-set values<br />
=<br />
Energy = 4 J<br />
total energy (E) /<br />
average power output<br />
(P)<br />
peak power output<br />
x pulse duration x<br />
frequency<br />
Frequency = 10,000 Hz<br />
Calculation of treatment time<br />
T = 4 J / 90 W x 100 ns x 10,000 Hz<br />
= 4 J / 90 W x (100 x 10-9 ) s x<br />
(10 x 10 3) Hz<br />
= 44.44 s<br />
*at less than 10,000 Hz the pulse duration<br />
is 200 ns<br />
You can set the frequency modulation in<br />
the “Changing the frequency” display.<br />
Reimers & Janssen superpulsed single<br />
probe<br />
32
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