Clarius Scanner HD3 Safety Topics
revision 9 52
minimal exposure to the patient. The threshold at which ultrasound energy causes bioeffects
for each individual patient is unknown, therefore, you must get the most information at the
lowest possible output level by adjusting the output intensity of the equipment.
As a general guideline:
1. Select the correct scanner frequency and application.
2. Start with a low output level.
3. Optimize the image by using focus, receiver gain, and other imaging controls.
4. If the image is still not diagnostically useful, increase output.
Additional considerations:
• Minimize scan time by performing only medically required ones.
• Use diagnostic ultrasounds efficiently and effectively, as all other medical tools.
• Compromising the exam's quality by rushing the exam could result in a poor exam, which
could require follow-up exams, which then adds exposure time.
• Select the appropriate TI and MI range for the task at hand.
• Note that output is affected by frequency, focus, pulse length, and dwell time.
Output Display
The output display provides an indication of the potential for bioeffects that might be caused
by the ultrasound energy being emitted. With this information, users can better control the
diagnostic ultrasound equipment and examination to ensure that needed diagnostic
information is obtained with a minimum of risk to the patient.
Display Standards
The system output display consists of the following exposure indices to indicate the potential
thermal and mechanical effects:
• TI: This is continuously displayed over the range of 0.0 to maximum output, based on the
scanner and application, in increments of 0.1, and consists of the following indices:
• thermal index for soft tissue (TIS)
• thermal index for bone (TIB)
• thermal index for cranial bone (TIC)
Keep output display indices to a minimum. Select a TI based on:
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