User's Manual

Important safety considerations
Vscan Air
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User Manual
2-19
Direction GP092020-1EN Rev 08
Sensitive tissues
Particular care should be taken to reduce the risk of thermal
hazard when exposing the following to diagnostic ultrasound:
- an embryo less than eight weeks after conception;
- the head, brain or spine of any fetus or neonate;
- an eye (in a subject of any age).
The British Medical Ultrasound Society has suggested some
maximum scanning times relative to displayed TI as follows:
Table 2-5: Recommended maximum scanning times (Obstetric scanning)
Obstetric scanning
General Abdominal, Peripheral
Vascular, Musculoskeletal, Cardiac
and other not listed applications
TI time TI time Note
0.0–0.7 Unlimited 0.0–1.0 Unlimited Monitor TI
0.7–1.0 < 60 min 1.0–1.5 < 120 min
1.0–1.5 < 30 min 1.5–2.0 < 60 min
1.5–2.0 < 15 min 2.0–2.5 < 15 min
2.0–2.5 < 4 min 2.5–3.0 < 4 min
2.5–3.0 < 1 min 3.0–4.0 < 1 min
References
• The British Medical Ultrasound Society. Guidelines for the safe use of diagnostic ultrasound equipment.
• American Institute of Ultrasound in Medicine Consensus Report on Potential Bioeffects of Diagnostic
Ultrasound.