Biological Safety; Limitation Vectors - GE VOLUSON 730Pro Basic User Manual

3.1.2

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, As Low As Reasonably
Achievable).
The VOLUSON® 730Pro 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.
3.1.3

Limitation Vectors

The table shows the limits for the following FDA and IEC parameters.
naming unit
Ispta.3 mW/cm²
pr MPa
MI -
TIB -
TIS -
TIC -
DT °C
W mW
This 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 730Pro - Basic User Manual
105831 Rev. 0
limits limits
FDA- IEC-
version Version
720 720
- 4.0
1.9 -
4.0 -
4.0 -
4.0 -
5.0 5.0
- 333
Description of the System
(chapter 2.13.8)
3-3