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Found 8 results

  1. UPDATED TUTORIAL: A Ridiculously Easily Way to Convert CT Scans to 3D Printable Bone STL Models for Free in Minutes Hello and welcome back. I hope you enjoyed my last tutorial on creating 3D printable medical models using free software on Macintosh computers. In this brief video tutorial I'll show you how to create a 3D printable skull STL file from a CT scan in FIVE minutes using only free and open source software. In the video I use a program called 3D Slicer, which is available from slicer.org. 3D Slicer works on Windows, Macintosh, and Linux operating systems. Also, I use Blender, which is available from blender.org, to perform some mesh cleanup. Finally, I check my model prior to 3D printing using Meshmixer from Autodesk. This is available at meshmixer.com. All software programs are free. If you like this, view my complete tutorial where I go through each step shown here in detail. I hope you enjoy the video.
  2. Dr. Mike

    How to section a skull in half

    Here is a message I recently received. I am posting my reply in hopes it will help others. ------------------------------------------- QUESTION: My name is ___________ and I am a student at the University of Missouri, attempting to print 3D images from CT scans. I have found your video extremely helpful and had a question if you don't mind about blender. My question is that lets say I want just the left half of the skull. How can I cut the skull down the middle, select the right side and delete. I have tried to find Blender YouTube tutorials about this but none of them have been helpful. It would be great if I could get your opinion on the matter. Would that be possible? Thank you so much for your time! Truly enjoyed the tutorial a lot! -------------------------------------------- ANSWER: The best way is to subtract the side you don't want by using a boolean operator. Start by creating basic shape, such as a cube, and scale it up so that it is bigger than the skull. Then, position the cube over the portion of the skull you want deleted. Then, with the skull selected, select the boolean modifier, choose difference, and the target should be the cube. Everthing that intersects with the cube should be gone. Be sure to accept the changes the modifier made. Good luck!
  3. Dear 3D whisperers I´m a vet and at the moment we are treating a cat that lost its rear paws for unknown circumstances. We took a CT scan of its body and some X-rays too, the problem is that the mesh generated (right tibia and fibula) does not seem to be matching the size of the images of the X-rays, even though the difference is minimal, the mesh it is bigger and thicker as you can tell in the images provided. Is this something normal? Which one is more accurate, the X-ray or the CT scan mesh? I used Slicer to generate the mesh from the DICOM files. Kindest Regards Johnny
  4. Hello Embodi3d, I was recently asked a question about maintaining and changing scale of objects in blender, and I thought I would share the answer with you. Here was the question: "I just ran through your tutorial regarding slicer, blender, and mesh mixer. I noticed that you mentioned how blender translates 1mm scale into different units. Is there a simple way to ensure a continuity of scale from CT scan to final print? In other words, is it possible to create a scale model of the structure taken form the CT/DICOM file?" Blender uses a fictitious unit of measurement called a "blender unit." When you import an STL generated from a CT or MRI scan, the default unit of measurements is mm. So, 1 mm on the scan is translated to 1 blender unit in blender. The default scene in blender starts with a cube that is 2 blender units large, or 2mm. That is why when you import a STL into blender it appears HUGE. You don't need to change the scale however. When you export the model from blender to an STL file, the blender units are again converted back to mm, and your model will have the correct scale when sent to the printer. If, however, you wish to change the scale of your model. You can do so by selecting the object in blender and hitting the "s" key (for scale). You can then freehand adjust the scale. If you wish to do so precisely, you can just type the number after the "s". For example, if you type "s" and then "0.5" the object selected will scale to 50%. Export to STL and your object should be at 50% size. Hope this helps. Dr. Mike
  5. I've released two tutorials on using Blender to get 3D bone models ready for 3D printing. Those of you looking for a freeware solution to preparing models for 3D printing may find this helpful. 3D Printing of Bones from CT Scans: A Tutorial on Quickly Correcting Extensive Mesh Errors using Blender and MeshMixer Preparing CT scans for 3D printing. Cleaning and repairing STL file mesh from bones using Blender, an advanced tutorial
  6. Dr. Mike

    MeshLab vs Blender

    Do people prefer MeshLab or Blender for mesh editing? I like Blender, although the learning curve is steep, but have limited experience with MeshLab. Any thoughts?
  7. Version

    123 downloads

    These are Blender and STL files to accompany the tutorial Preparing CT scans for 3D printing. Cleaning and repairing STL file mesh from bones using Blender, an advanced tutorial. Files are in ZIP format. Download and follow along.

    Free

  8. Version 1

    112 downloads

    Methods 3D Medical imaging data was obtained in the .stl format. The hyoid bone was localized from the .stl --sectioned off in the software -- and that part of the anatomy was revised using 3D modeling techniques to be highly adaptable to 3D printing platforms for potential regenerative medicine applications. Author and Licensing This hyoid bone re-topology was performed by Chris Leggett. It is free to use for research purposes, with modifications as needed, and any future clinical purposes with standard citation practices for using this material and under the creative commons attribution license. Additional citations (Public domain original material) = 3DPX-000601 from NIH3D Print Exchange

    Free

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