Description of the System
3.1.1 Biological
Safety
The biological effects of diagnostic ultrasound on the human body have not been entirely investigated
yet. So far no damages by ultrasound diagnosis are known, still the instrument should only be used by
a medical doctor or under his supervision.
The ultrasound examination should be performed in as short of a time as possible and with the lowest
transmit power available to enable diagnostic results (ALARA principle,
A
s
L
ow
A
s
R
easonably
A
chievable).
The VOLUSON
®
730 permanently controls the emitted power and limits it acc. to the maximum
values set by the manufacturer (sound field limiting vector). The occurring sound intensities depends
on the respective probes. The declaration of sound field parameters acc. to IEC 1157 can be obtained
from the manufacturer on request.
3.1.2 Limitation
Vectors
The table shows the limits for the following FDA and IEC parameters.
naming unit
limits
FDA-
version
limits
IEC-
Version
Ispta.3
mW/cm²
720
720
pr MPa
-
4.0
MI - 1.9
-
TIB - 4.0 -
TIS - 4.0 -
TIC - 4.0 -
DT
°C 5.0 5.0
W
mW
-
333
These values are individual Presets for FDA or IEC, and can only be changed in the company.
Review also:
Notes for Acoustic Output Tables for Track 3
Voluson
®
730 - Instruction Manual
105838 Rev. 3
3-3
