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tsehrhardt

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tsehrhardt last won the day on October 2

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About tsehrhardt

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  1. Version 1.0.0

    0 downloads

    Left and right innominates from the Visible Human Female CT scan downloaded from https://mri.radiology.uiowa.edu/visible_human_datasets.html. Models were generated using the Segment Editor in 3D Slicer and internal components were removed using Meshlab so meshes are hollow. Use to practice siding, age estimation, sex estimation. Animation rotates each os coxae from anterior view to lateral to anterior to medial and back to anterior so the left and right sides can be compared in each view. Models are in anatomical position so they can be combined into one viewing space for comparison as shown--import both into Meshlab or 3D Slicer for further visualizations and/or measurements. Sketchfab viewer available here: https://skfb.ly/6VqV9 and can be embedded into Learning Management Systems.

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  2. Version 1.0.0

    23 downloads

    skull, anthropology, sex, estimation, male, female orbit, mandible, maxilla, angle, ramus, coronoid, conduct, inner, frontal, temporal, parietal, occipital, mastoid, process, foramen, foramina, incisor, molar, premolar, canine, teeth, tooth, dental, dentistry, head, zygomatic, arch, Compare traits between male and female skulls as described in: https://www.morphopasse.com/uploads/8/4/0/8/8408493/klales_nij_database_manual_v1_03.29.19_on_website.pdf. Models were generated from TCIA Head and Neck Cetuximab collection (0522c0251 (top) and 0522c0476 (bottom)), originally under National Institute of Justice grant #2014-DN-BX-K005. Vertebrae were removed during segmentation for access to inferior landmarks, so occipital condyles may be flattened. Models are arranged so they can be combined into one viewing space for comparison as shown--import both into Meshlab or 3D Slicer for further visualizations and/or measurements. Sketchfab viewer available here: https://skfb.ly/6UDFQ and can be embedded into Learning Management Systems.

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  3. You don't need to create separate DICOM files for the skull and mandible. Depending on the overlap of the teeth, you can erase some of the segmentation in order to create gaps between the skull and mandible--if you are segmenting yourself. If you are uploading to democratiz3d, you can download the model and then either apply a plane cut in Meshmixer or if you want the actual articulations, you can "paint" the parts of the model to delete to create the necessary gaps, then repair the holes. Again, the difficulty would depend on whether you can separate the teeth on the maxilla from the mandible.
  4. Yes definitely! I would definitely like to see it applied more to unidentified remains.
  5. In case there is any interest here in the applications of radiology and imaging in forensic science, I wanted to share the link to the next conference in Albuquerque, New Mexico, May 14-16, 2020: https://www.isfri2020.com/. I definitely plan to go and will probably submit some kind of abstract about bones from CT supplementing reference collections for forensic anthropology. The abstract submission deadline is December 12. Terrie
  6. You can also use the EasyClip tool in 3DSlicer: import your CT volume and your 3D model (or even just your 3D model), then you can use the CT slices as planes to indicate where you want to cut--you can still rotate them if needed. You can save the half you want and even "undo" and save the other side (similar to Meshmixer). Slicer is especially handy if you have landmark coordinates and want to place a cut exactly at a specific coordinate, for example if you have oriented models and nasion is at x = 0--you can type this in to the appropriate slice view (red, yellow, green).
  7. tsehrhardt

    Mimics

    For tiffs, I like to open the stack in Fiji and save as NRRD--the NRRD opens much faster in Slicer. You can also set the spacing in Fiji for the NRRD to have the correct dimensions in Slicer.
  8. Version 1.0.0

    10 downloads

    Skull and face models were generated in Mimics from a CT scan from TCIA (citations: http://doi.org/10.7937/K9/TCIA.2015.K0F5CGLI, https://doi.org/10.7717/peerj.2057, https://link.springer.com/article/10.1007%2Fs10278-013-9622-7) as reference models for visualizing skin-to-bone relationships for forensic craniofacial identification applications. See Figshare for additional project information. Face model was hollowed in Meshlab and extruded to this individual's minimum facial tissue depth (1.6 mm) with Meshmixer (tutorial). Cuts were made in 3D Slicer using the EasyClip plugin to cut at specific landmark coordinate values: skin was cut through x-coordinate of pronasale and right oculus anterius, z-coordinate of bony glabella; bone was cut through x-coordinates of left and right oculus anterius, z-coordinate of glabella, y-plane was adjusted until posterior to cheilion. For 3D printing, I rotated the model until the posterior surface was flat on the bed and added a raft to hold the supports (I left the raft on--see pic), but a custom platform could be added instead with Meshmixer or Tinkercad. I usually leave most of the supports attached to hold the skin layer in place, but remove supports from inside the nasal aperture and sometimes remove supports from the lateral side to reveal the infraorbital foramen. I don't have dual extrusion, but you could probably print the skin in one color and bone in another. The above pics show a print at 300 micron resolution. **Note that this file contains two merged models that can be printed together or separately--to separate, open in Meshlab, right-click the model name in the layer dialog and select "Split into Connected Components" and save each layer as a separate model.

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  9. What software did you use to cut the model in the first place? If you use Edit-->Plane Cut in Meshmixer or the EasyClip module in 3DSlicer, it should fill the gap for you with a flat surface.
  10. I know! Anthropologists tend to use Morphosource, although I haven't seen clinically derived data there. As you might have gathered from the survey, there is much discussion in anthropology about the ethics of sharing/posting human skeletal data, especially with clinical CT data becoming more accessible. I have full and cut facial models from TCIA--would that be ok to post here? I have also built 3D html pages that allow interaction with the models that I'm trying to find/build a home for so that I could possibly also cross-reference to printable models here.
  11. For this particular survey, they are requesting only USA residents. The first survey was conducted in Portugal. If a 3rd survey comes out, I'll be sure to post the link for that as well.
  12. It is for anyone. I have mostly seen it shared in anthropology forums, but I think input from the biomedical community would be useful to the survey authors, esp regarding modern human data.
  13. Sharing for another anthropologist in case anybody here is interested in contributing their thoughts about sharing images and 3D models of human bones. This is the link to a survey called "Perspective on the dissemination of three-dimensional models of human skeletal remains online in the United States." https://docs.google.com/forms/d/e/1FAIpQLSc-6lvKD9oPu69YVf_aWrnZC2JFNrBred_DM8Xj3xqfauNveQ/viewform Thanks! Terrie
  14. There are some muscle sets on Sketcfab but I haven't found any that are downloadable. The ATOR site (http://arc-team-open-research.blogspot.com/2013/12/modeling-muscles-and-skin-in-blenders.html) has posts on many facial reconstruction resources, primarily using Blender. I can't find whether Cicero Moraes has provided links to muscle models. If you are not familiar with Blender, Meshmixer might be easier to add primitives and deform them to the appropriate shapes. I have found that you can also import a skull two times into Meshmixer so that you can use the sculpting tools to "pull" the muscles or even tissue depth pegs from one skull mesh while leaving an intact/visible skull mesh underneath.
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