This page explains all relevant features on the Clinical Measures Measures page of LaserCAM Prescribe.
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Navigation
Click Clinical Measures from the menu to access this page in LaserCAM Prescribe.
Page Layout
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Page Fields
Scan Angle
The Scan Angle specifies the alignment of the foot in the frontal plane relative to a provided reference position and is specified in degrees.
| Warning |
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You cannot use Scan Angle as your reference alignment if you capture non-colour STL files unless you also provide a Forefoot Varus or Forefoot Valgus measurement. If your scanner captures a visible heel bisection then Scan Angle is an Acceptable Reference Measurement. |
Default Value | Minimum Value | Maximum Value |
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0° | -45° (Eversion) | 45° (Inversion) |
A positive value indicates an inversion of the 3D foot scan relative to its reference position.
Increasing the inversion angle will increase medial arch height, medial heel wedging and total medial support of the orthosis.
A negative value indicates an eversion of the 3D foot scan relative to its reference position.
Increasing the eversion angle will increase lateral arch height, lateral heel wedging and total lateral support of the orthosis.
Forefoot Varus
The Forefoot Varus specifies the alignment of the 3D foot scan. This measurement is a pre-requisite if you do not capture a scan with a heel bisection.
Default Value | Minimum Value | Maximum Value |
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0° | 0° | 45° |
| Tip |
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A captured Forefoot Varus may be maintained intrinsically within a Machined EVA orthosis. For more information refer to Maintain Forefoot Varus/Valgus on the Device Options help page for Machined EVA orthoses. |
The image below shows a 7.5 degree Forefoot Varus. This measurement is then used to align the 3D scan in the frontal plane.
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| Warning |
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Make sure that you accurately measure the Forefoot Varus as this has significant effects on the orthosis. |
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The Forefoot Valgus specifies the alignment of the 3D foot scan. This measurement is a pre-requisite if you do not capture a scan with a heel bisection.
Default Value | Minimum Value | Maximum Value |
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0° | 0° | 45° |
| Tip |
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A captured Forefoot Valgus can be maintained intrinsically within a Machined EVA orthosis. |
The image below shows a 10 degree Forefoot Valgus. This measurement is then used to align the 3D scan in the frontal plane.
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| Warning |
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Make sure that you accurately measure the Forefoot Valgus as this has significant effects on the morphology of the manufactured orthosis. |
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| Note |
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If your scanner does not capture a highly accurate 3D scan, but still captures colour information then we recommend inputting data in this field to allow for calibration of the 3D scan during computer-aided design. |
Default Value | Minimum Value | Maximum Value |
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0mm | 0mm | 250mm |
The image below shows a 142mm Heel Centre to 1st MPJ Centre.
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In the image below the digital measurement of the Heel Centre to 1st MPJ Centre is 141.9mm.
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This digital measurement is then used to calibrate the 3D scan.
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| Note |
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Some 3D scanners will be significantly more inaccurate than the example provided above. |
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A measurement from the most posterior point of the heel to the centre of the heel measured with a LaserCAM Goniometer. This measurement is used to position a 3D scan in the sagittal plane during computer-aided design.
Default Value | Minimum Value | Maximum Value |
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0mm | 0mm | 100mm |
| Note |
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You do not need to capture this measurement if you scan with the LaserCAM VPS. This measurement is a prerequisite for all scanners that do not accurately capture the posterior aspect of the heel. Without this information a 3D scan cannot be accurately positioned in 3D space, which can lead to negative clinical implications. |
The image below shows a 35mm Posterior Heel to Heel Centre measurement as captured in the clinic.
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| Info |
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The measurement device above is called a LaserCAM Goniometer. |
The image below shows the digital measurement being utilised during computer-aided design.
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What can happen if I don't provide this measurement?
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Capture, or import a 3D scan of the patients foot into the 3D Scans page of LaserCAM Prescribe.
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Make sure you have a good view of the posterior heel when capturing the 3D scan. |
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After capturing or importing a scan into the 3D Scans page in LaserCAM Prescribe, view the scan from the posterior heel view. 
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Orientate the scan into your preferred alignment by left clicking the display and rotating the scan.
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Use the Right Angle Measurement tool to measure with reference to the ground plane.
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In the image above the measurement is 90°.
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Open the Clinical Measures page and enter your required Scan Angle.
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Forefoot Varus/Valgus Method
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Capture, or import a 3D scan of the patients foot into the 3D Scans page of LaserCAM Prescribe.
| Tip | |
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We recommend that a health care professional consider the correction of the forefoot relative to the rearfoot during 3D scan capture. Warning | . Pre-Correction Forefoot Supinatus
Post-Correction Forefoot Supinatus
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Measure Forefoot Varus/Valgus
Use the Measure Angle or Measure Right Angle tools to measure the Forefoot Varus or Forefoot Valgus that has been captured.
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In the image above the measurement shows an 8.5° Forefoot Varus.
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Open the Clinical Measures page and enter your required measurement.
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Combining Measurements
If both Scan Angle and Forefoot Varus/Valgus are specified then both will be used.
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The subsequent alignment can be seen below, showing a final Forefoot Varus alignment of 15°.
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