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The following illustrates a standard operating procedure (SOP) for aligning a 3D foot scan placing RefPoints in order to generate an orthosis model in RapidShell3D.

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Table of Contents

Prerequisites

Prescription loaded into 3D scan aligned in RapidShell3D

Refer to the following guide for more information:

📋 SOP: Loading Prescription Aligning 3D Scan in RapidShell3D

Goals

Align a Place RefPoints on 3D foot scan in RapidShell3D
Generate an orthosis model based on the placed RefPoints

Procedure

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Click Files → Display Left Foot
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A 3D scan of the patient’s left foot should now appear on the screen
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Click Place Points
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In specific order, click the Heel Point → 1st MPJ Centre Point → 5th MPJ Centre Point
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Click Align for Valgus or Align for Varus
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Click Accept
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Click Apply
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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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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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RefPoints from the toolbar.
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Click Yes.
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Use the middle-click of your mouse to place a point at the apex of the medial longitudinal arch (MLA).
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Use the middle-click of your mouse to place a point at the widest point of the lateral heel.
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Use the middle-click of your mouse to place a point at the widest point of the medial heel.
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Use the middle-click of your mouse to place a point at the point in which you would like the orthosis shell to end in width and length at the lateral forefoot.
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Use the middle-click of your mouse to place a point at the point in which you would like the orthosis shell to end in width and length at the lateral forefoot.
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Click Accept
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A red orthosis model will now be generated based on the RefPoints placed on the foot. The generation of this red orthosis model will also be dependent on prescriptive variables input into your LaserCAM Prescribe prescription.
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