Samsung ACCUVIX XG Manual de usuario descargar pdf (Pagina 140)

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Operation Manual

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HPRF (High PRF) Function

Adjust the blood flow above the speed limit at a specific depth. This increases the scale. This function

is available only in PW Spectral Doppler Mode (D Only).

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Activating HPRF

To activate HPRF, increase the Scale values at the required depth. A The Phantom Gate will

appear on the D Line at a position higher than the sample volume. Once HPRF starts, PRF does

not increase even if you increase the scale value.

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Finishing HPRF

While HPRF is in use, decrease the scale value by one step to finish HPRF. The maximum PRF

values in PW Spectral Doppler Mode are shown.

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Moving Sample Volume

To move the Sample Volume position in the D Only state, the system calculates PRF values and

the Phantom Gate position, and updates them on the PW Spectral Doppler image. HPRF is

terminated when HPRF cannot be activated.

When Sample Volume is moved in the 2D Only state, the PRF values don’t change.

NOTE: HPRF is not activated in Simultaneous Mode. This is set in [Utility] > [General] > [Scan

Mode] > [Simultaneous]. It is also not activated if [PRF*2] exceeds 23KHz.

CAUTION:

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The Phantom Gate position can be located outside the 2D image area in Zoom Mode.

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Make sure that sample volume and Phantom Gate are not placed together in the measuring

area. If more than two Sample Volumes are located in the vessels, all Doppler components will

appear in the spectrum, causing noise.

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Samsung ACCUVIX XG Manual de usuario Pagina 140