# Widen the range in ultrasound system

**URL:** <https://discourse.slicer.org/t/widen-the-range-in-ultrasound-system/1399>\
**Category:** Support\
**Created:** [November 8, 2017, 4:49am UTC](https://discourse.slicer.org/t/widen-the-range-in-ultrasound-system/1399 "2017-11-08T04:49:55Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![XUXIN\_ZENG](https://avatars.discourse-cdn.com/v4/letter/x/13edae/32.png) [@XUXIN\_ZENG](https://discourse.slicer.org/u/XUXIN_ZENG)\
**Post date:** [November 8, 2017, 4:49am UTC](https://discourse.slicer.org/t/widen-the-range-in-ultrasound-system/1399/1 "2017-11-08T04:49:55Z")

</div>

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.

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<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [November 8, 2017, 4:53am UTC](https://discourse.slicer.org/t/widen-the-range-in-ultrasound-system/1399/2 "2017-11-08T04:53:59Z")

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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>
```