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The following illustrates a standard operating procedure (SOP) for aligning a 3D foot scan in RapidShell3Dapplying a heel skive in FotoView.

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Table of Contents

Prerequisites

  • Prescription loaded into RapidShell3D3D foot scan aligned in FotoView

Refer to the following guide for more information:

📋 SOP: Loading Prescription in RapidShell3DAligning 3D Scan in FotoView

Goals

  •  Align a 3D foot scan in RapidShell3D

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  • Apply a Heel Skive in FotoView

Procedure

General Procedure

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  1. Click Files → Display Left Foot

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  2. A 3D scan of the patient’s left foot should now appear on the screen

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  3. Click Place Points

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  4. In specific order, click the Heel Point → 1st MPJ Centre Point → 5th MPJ Centre Point

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    5. Click Align for Valgus or Align for Varus
    (info) The prescription form may contain values for Forefoot Varus or Forefoot Valgus. If such values exist, please click the corresponding button.
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  5. Click Accept

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    6. Click Apply
    (info) The Distances box will display a distance between the Heel Centre point and 1st MPJ centre point that were placed on the 3D scan surface during Step 4. If a prescription value exists for Heel Centre to 1st MPJ (mm)a Scale Factor will appear and allow for automatic scaling of the 3D scan. Please note that it is not recommended to scale 3D scans captured with the LaserCAM VPS 3D scanner, or any other scanner that is known to capture highly accurate 3D foot scans.
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    Position the scan in the Plantar view using the controls along the bottom toolbar

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    Position the scan in the Heel view using controls along the bottom toolbar according to a provided Acceptable Reference Measurement.
    Method 1: Heel Bisection Measurement
    📋 SOP: Heel Bisection Measurement
    You may use the blue Z-axis line to reference the heel bisection in neutral (0°). You can then use the Invert and Evert controls from the bottom toolbar to rotate the scan into the alignment specified in the Scan Angle field on the prescription.
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    Method 2: Forefoot Varus/Valgus Alignment Method
    📋 SOP: Forefoot Varus/Valgus Measurement
    If a Forefoot Varus or Forefoot Valgus measurement has been recorded on the prescription form, RapidShell3D will automatically rotate the 3D scan to this value. You will need to measure the alignment to ensure that you have accurately rotated the 3D scan.
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  6. Position the scan in the Medial view so that the blue Z-axis line is breaking through the heel of the scan at approximately 20mm in height

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  1. Adjust Mesh → Any View

  2. Click Close from the Adjust Mesh toolbar

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    (info) The Skive menu option will now be selectable

  3. Click Skive from the top menu

    (info) A Skive Plate will now appear on the display in an orientation specified by the Depth and Degree values specified on the Machined EVA prescription.

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  4. The Skive Plate controls will also appear, which provides fine control over the position of the Skive Plate

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  5. Use the Skive Plate controls to orientate the Skive Plate according to the prescriptive variables

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  6. Click Close to save the Skive

Info

Skives can be requested on the Machined EVA prescription form using the Depth/Degree Method and also the STJ Axis Method. Please reference the individual guides below for assistance.

Depth/Degree Method

When Depth/Degree Method is selected on the Machined EVA prescription form, it will be visible under the 3D Scan Alignment header, within the Skive row.

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  1. Follow Steps 1-4 of the General Procedure listed above

  2. Click View → Back

  3. Check the Degree of your Skive Plate using the Measure → Angle tool

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  4. Click View → Right Side (left foot) / View → Left Side (right foot)

  5. Use the Pitch Fore/Aft control to match the specified Inclination

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  6. Orientate the Skive Plate so that you can accurately measure the Depth

  7. Check the Depth of your Skive Plate using the Measure → Distance tool

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  8. Click Close to save the Skive

STJ Axis Method

When STJ Axis Method is selected on the Machined EVA prescription form, it will be visible under the 3D Scan Alignment header, within the Skive row.

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  1. Follow Steps 1-4 of the General Procedure listed above

  2. Click View → Bottom

  3. Use the Rotate L/R control to rotate the Skive Plate in-line with the STJ axis

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  4. Use the Skive Angle control to rotate the Skive Plate so that it is medial to the STJ axis

    (info) If you are applying a lateral Skive, you should ensure that the Skive Plate is lateral the STJ axis

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  5. Use the Pitch Fore/Aft control to match the specified Inclination

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  6. Orientate the Skive Plate so that you can accurately measure the Depth

  7. Check the Depth of your Skive Plate using the Measure → Distance tool

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  8. Click Close to save the Skive

Tip

A Heel Skive should now be applied relative to the requested prescription.

Related SOP's

Related Labels
labelsrapidshell3dfotoview-sop