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Scanning Accuracy
January 2019
As a part of our customization process we worked to find a way to mimic an amputee’s opposing hand, if applicable. The goal is to create a close to exact, flipped replica of their existing hand. The first, and possibly the most difficult task, is measuring the hand with accuracy. We used a portable 3D scanner called GO!SCAN 3D™ from Creaform. Since we are new to this piece of equipment the most important factors include accuracy and ease of use.
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The GO!SCAN 3D™ allows us to make several scans and compile data quickly. If there are ever any cases where the patient does not have an opposing hand, we are still able to scan a similar body structure’s limb to create realistic parts. The data collected from each scan also allows us to create an array of sizes based on the relationship of different sizes.
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Figure 1. GO!SCAN 3D™
Once the background and targets are in place, scanning the object only takes a few minutes. The GO!SCAN 3D™ scanner measures 550,000 measurements per second and quickly complies into a software. No manual entry is required. It measures accuracy up to 0.1 mm and a volumetric accuracy up to 0.30mm/m. So far, this scanner is the most accurate and efficient method we have used.
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Figure 2. Target placements on hand.