FujiFilm SonoSite SII, User Manual Supplement

Page: 21 / 476

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Measurements and calculations 19
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General calculations
Volume flow calculation
The volume flow calculation is available in the following exam types: Abdomen and Arterial.
Both a 2D and a Doppler measurement are required for the volume flow calculation. For the 2D
measurement, you can do either of the following:

Measure the diameter of the vessel. This approach is more precise. The measurement overrides the
gate size.

Use the gate size. If you do not measure the diameter of the vessel, the system automatically uses
the gate size and “(gate)” appears in the calculation results. Using this option may result in significant
error.
The Doppler sample volume should completely insonate the vessel. You can measure either the time
average mean (TAM) or time average peak (TAP).

Pressure Gradient (PGmax)

Pulsatility Index (PI)

End Diastolic Velocity (EDV)

Resistive Index (RI)

Acceleration Time (AT)

Time Average Peak (TAP)

Gate Depth

Minimum Diastolic Velocity (MDV)