Biological Safety Safety
Lumify Ultrasound System 45
Philips Healthcare 4535 618 58571_A/795 * MAY 2016
• Zoom: Increasing the zoom magnification by spreading the display may increase frame rate.
This action will increase the TI. The number of focal zones may also increase automatically
to improve resolution. This action may change the MI, because the peak MI can occur at a
different depth.
Color Controls
• Color Sector Width: Narrower color sector width will increase color frame rate and the TI
will increase. The system may automatically decrease pulser voltage to stay below the
system maximum. A decrease in pulser voltage will decrease the MI.
• Color Sector Depth: Deeper color sector depth may automatically decrease color frame rate
or select a new color focal zone or color pulse length. The TI will change due to the
combination of these effects. Generally, the TI will decrease with increased color sector
depth. MI will correspond to the MI of the dominant pulse type which is a color pulse.
Other Control Effects
• 2D Depth: An increase in 2D depth will automatically decrease the 2D frame rate. This will
decrease the TI. The system may also automatically choose a deeper 2D focal depth. A
change of focal depth may change the MI. The MI displayed is that of the zone with the
largest MI value.
• Application: Acoustic output defaults are set when you select an application. Factory
defaults vary with transducer, application, and mode. Defaults have been chosen below the
FDA limits for intended use.
• Imaging Mode Controls: When a new imaging mode is selected, both the TI and MI may
change to default settings. Each mode has a corresponding pulse repetition frequency and
maximum intensity point. In combined or simultaneous modes, the TI is the sum of the
contribution from the modes enabled, and the displayed MI is the largest of the MI values
associated with each mode and focal zone enabled. The system will return to the previously
selected state if a mode is turned off and then reselected.
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