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Everything posted by tsehrhardt

  1. From the album: 3D Bones for Anthropology

    Digitally sliced CT humerus to provide fragments and cross-sections for advanced identification.
  2. From the album: 3D Bones for Anthropology

    Examples of 3D printed bones we presented at a recent conference.
  3. It is definitely not the software to buy just for 3D printing (3D Slicer is the way to go for that), but for research and other advanced functions, it's great!
  4. I thought I'd do a quick post on why anthropologists need 3D printed bones in case anybody's interested. Real bones are expensive! Although we have real skeletons for teaching osteology, we are often limited to teaching the identification and examination of whole bones. For both forensic and archaeological contexts, osteologists need to be able to identify bones that are incomplete, scavenged, weathered, burned, or damaged in some other way. In such situations, the first question is whether or not the bone is human. In order to teach this advanced level of identification, we need bone fragments. We can't go around smashing bones to create the fragments, and if you're at an institution without a large archaeological collection of bones, 3D printing, especially of CT scans, can provide some fragments. Because CT scans contain internal structures (as opposed to laser scans of bones), we can digitally slice long bones to create cross-sections or cut models in ways that bone frequently fragments. We can potentially simulate trauma as well, although scans of bones with trauma or pathology would be even better. I've recently started working with the Virtual Curation Laboratory (https://vcuarchaeology3d.wordpress.com/) to 3D print bone fragments, whole bones, and bones with pathology or trauma. All of these things can be used to create "case studies" of single individuals or commingled individuals as well, and since they're plastic, we would have no problem using them outside for field exercises and excavations. Having age and/or sex is also important since higher quality 3D printed bones could be analyzed for those traits as well. I've added some pictures from a recent conference at VCU where we presented our preliminary work and displayed a few printed bones. Some of them still have some support structures, but you can see what we're going for. Thanks for reading!
  5. I need a CT scan of my head.
  6. Thanks for this! I haven't used Blender in a while so the tutorial will help me to try it out again. Do you ever use the Grayscale Model Maker module in 3D Slicer to make 3D models?
  7. I believe the base price is around $9k, but they might add a discount if you buy more than one license, and then of course each module has an additional price. I wrote it into my current grant since I had used it before and I really like the Simulation Module for measuring. I also like the editing power--after creating a segmentation mask, I can scroll through the slices and perform local thresholds or edit pixels to recover/fill areas of thin bone that I need. I haven't found that level of editing in other programs.
  8. Thanks for this overview! How long did it to take to print a skull on the Makerbot?
  9. I am currently using Mimics to generate skull and face models for my research project. It does come with 3-matic which is supposed to facilitate processing of models for printing, but I haven't had a chance to learn it. For the few things I've printed so far, I exported .stl files from Mimics and cleaned them up in Meshlab. I have used 3DSlicer, but primarily the Grayscale Model Maker rather than the Model Maker. I haven't found great settings for the Model Maker and I'm not sure if it gives you the editing power that Mimics does. The Grayscale Model Maker creates surfaces which works well for "complete" bones. Extra pieces can be removed easily in Meshlab.
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