Widen the range in ultrasound system

Hi everyone, can anyone help me how to expand the range of the ultrasound system or change the linear probe into convex probe? I tried to change the parameters about image reference in mrml file, but nothing change.

If you mean simulating convex probe instead of a linear probe, then in the example configuration file delete/comment out the section that refers to linear scan conversion and use the one that refers to curvilinear probe:

From this:

   <RfProcessing>
      <ScanConversion
        TransducerName="Ultrasonix_L9-4/38"
        TransducerGeometry="LINEAR"
        ImagingDepthMm="60.0"
        TransducerWidthMm="40.0"
        OutputImageSizePixel="820 616"
        TransducerCenterPixel="410 0"
        OutputImageSpacingMmPerPixel="0.084 0.087"/>
    </RfProcessing>
  </vtkPlusUsSimulatorAlgo>

To this:

   <RfProcessing>
      <ScanConversion
        TransducerName="Ultrasonix_C5-2/60"
        TransducerGeometry="CURVILINEAR"
        RadiusStartMm="60.0"
        RadiusStopMm="120.0"
        ThetaStartDeg="-28.0"
        ThetaStopDeg="28.0"
        TransducerCenterPixel="410 100"
        OutputImageSizePixel="820 616"
        OutputImageSpacingMmPerPixel="0.084 0.087" />
    </RfProcessing>
  </vtkPlusUsSimulatorAlgo>