Enraf Nonius Sonopuls 190 Instrucciones De Manejo página 52

5 cm² Applicator
Ultrasound frequency:
1 MHz
3 MHz
ERA (Effective Radiation Area):
IEC 60601-2-5: 2000
21 CFR 1050.10
Beam type:
1 MHz
3 MHz
BNR (Beam Non-uniformity Ratio)
Side radiation
0.8 cm² Applicator
Ultrasound frequency:
1 MHz
3 MHz
ERA (Effective Radiation Area):
IEC 60601-2-5: 2000
21 CFR 1050.10
Beam type:
1 MHz
3 MHz
BNR (Beam Non-uniformity Ratio)
Side radiation
Description of ultrasound field
The spatial distribution of the radiated field is a collimated beam (diverging for the 0.8 cm² applicator at 3 MHz) of ultrasound energy, with a decreasing Amplitude at increasing distance from the applicator
surface. This field distribution applies to the radiation emitted into the equivalent of an infinite medium of
distilled, degassed water at 30 ºC and with line voltage variations in the range of ± 10% of the rated
value. The ultrasonic beam is characterized by the Effective Radiation Area (ERA) and the Beam Non-
uniformity Ratio (BNR).
The Effective Radiation Area is the cross-sectional area of the ultrasound beam. Its value depends on the
ultrasound standard used:
•
International: IEC 60601-2-5: 2000
•
USA: 21 CFR 1050.10
The Beam Non-uniformity Ratio is the ratio of the maximum ultrasound Amplitude to the average
ultrasound Amplitude, measured at the Effective Radiation Area. A low BNR value is indicative for the
absence of high and potentially dangerous energy concentrations.
Amplitude
modulatie
16Hz
16Hz
16Hz
16Hz
16Hz
16Hz
16Hz
48Hz
48Hz
48Hz
48Hz
50
48Hz
48Hz
Duty
cycle Pulsduur RTPA
5% 3.1ms
10% 6.3ms
20% 12.5ms
33% 20.6ms
50% 31.3ms
80% 50ms 1.25
100%* 62.5ms
5% 1ms
10% 2.1ms
20% 4.2ms
33% 6.9ms 3.33
50% 10.4ms
80% 16.7ms 1.25
: 0.98 MHz ± 2 %
: 3.1 MHz ± 2 %
: 4 cm²
: 5 cm²
: Collimating
: Collimating
: 6:1 maximum
: 10 mW/cm² maximum
: 0.98 MHz ± 2 %
: 3.1 MHz ± 2 %
: 0,6 cm²
: 0,8 cm²
: Collimating
: Diverging
: 6:1 maximum
: 10 mW/cm² maximum
20
10
5
3
2
1
20
10
5
2