- Видео 15
- Просмотров 11 623
Terrie Simmons-Ehrhardt
США
Добавлен 17 июл 2006
I am a biological anthropologist specializing in applying 3D methods to human osteology, mostly for forensic anthropology and craniofacial identification. I have been modeling CT scans since 2007, 3D scanning and 3D printing since 2015. I provide 3D scanning services and facial feature feedback for unidentified skeletal cases, as well as various 3D scanning and 3D modeling services (CT, microCT, CBCT) for a broad range of applications. I love using Sketchfab to display human skeletal variation and comparative osteology scenes.
Aligning Models in Meshlab
This video shows you how to align meshes in Meshlab. Usually this step needs to be performed before a quantitative mesh comparison (video linked below).
Mesh Comparison in Meshlab: ruclips.net/video/O_3O_BuPkyA/видео.htmlsi=6sDfElYx8-1lKsks
Mesh Comparison in Meshlab: ruclips.net/video/O_3O_BuPkyA/видео.htmlsi=6sDfElYx8-1lKsks
Просмотров: 3 618
Видео
Displaying Biomedical Models on Sketchfab
Просмотров 10510 месяцев назад
This video shows you how to enhance biomedical models (those derived form CT, microCT, CBCT, MRI, human or nonhuman) for display on Sketchfab or other web platforms. I show you how to apply color in Meshlab and Blender and which features in the Sketchfab viewer will help make your models look better. My CT models collection on Sketchfab: skfb.ly/oKQ6o My Kofi: ko-fi.com/terrie3d
Comparing Meshes in Meshlab
Просмотров 6 тыс.Год назад
This video demonstrates visual and quantitative tools for comparing meshes in Meshlab and the outputs that can be generated from the comparisons. Specifically, I compare 2 skulls generated (many years ago) with Mimics software same CT, same segmentation mask, but different 2D to 3D reconstruction algorithms. Meshlab 2020.02 (portable): github.com/cnr-isti-vclab/meshlab/releases/tag/Meshlab-2020...
Exportable Animated Heart
Просмотров 348Год назад
This video demonstrates the application of the Total Segmentator tool in 3D Slicer to a 4D computed tomography data set of a cardiac sequence. After segmentation, I show you how to export the 3D heart models representing all 10 frames of the cardiac sequence. I then demonstrate how to apply Blender shape keys to the exported heart models so that you can have 1 mesh per heart part that deforms t...
Full Human Skeleton
Просмотров 96Год назад
Full human skeleton laid out in anatomical order. Models derived from a full body computed tomography scan were downloaded from the NIH 3D Print Exchange (3dprint.nih.gov/discover/3dpx-016838), made available by user MySegmenter under CCBY license. The original download did not include the hyoid, so I segmented it from the DICOMs that were also provided. Sketchfab: skfb.ly/oHnXX My Kofi: ko-fi....
Hand Bones
Просмотров 29Год назад
3D viewers for hand bones derived from computed tomography scans. The first allows you to toggle the visibility of each bone or groups of bones (www.terriesimmons.com/hand-bones). The second is color coded and is viewable on Sketchfab as well as in AR via the QR code (skfb.ly/oETt7). Hand bones were extracted from a segmented computed tomography scan of a full human skeleton made available for ...
DICOM to Point Cloud
Просмотров 1,2 тыс.Год назад
This video shows you how to convert a DICOM series from a CT scan to a point cloud volume that can be displayed on Sketchfab (like this: skfb.ly/oAr7q). This method can be useful when a volume rendering may be more informative than trying to segment a surface model the finished point cloud can be displayed as a private model in a viewer like Sketchfab. Software needed (all free): Paraview: www....
Rib App
Просмотров 45Год назад
I made a small application for studying and/or teaching human rib identification. Ribs are anatomically accurate and in anatomical position. Visibility of each rib can be toggled with the controllers on the left. Ribs were segmented from a computed tomography scan from the [CT Lymph Nodes Collection](wiki.cancerimagingarchive.net/display/Public/CT Lymph Nodes) of the [TCIA](www.cancerimagingarc...
Thank you for this tutorial :) Very useful for my research
@@manolisnikolakakis7292 I'm glad it's been helpful for you!
I like the tone of simplicity in your videos. Really removes the intimidation that Meshlab has
@@cncmrg thanks!
Thank you!! Really helpful to me.
@@user-qw6ye4sk1q you're welcome! I'm glad to hear it was useful.
My points aren't gluing where I'm clicking, they're falling a little short. Is there a specific file type I should be importing into MeshLab?
The alignment is forgiving if your paired points aren't exactly in the right spot. Any file type is fine--usually this would be done with PLY, STL or OBJ.
Hi Terrie, Thanks for the video. I've got one little tip for you: the font size of the text in the bottom-right window can be adjusted by holding CTRL and rolling the mousewheel ;-)
Ooh that's nifty! Thank you!
@@terrie3D Thanks for your videos. Here's another one: you can toggle ortho view by hitting 5 on your numpad
Hello! Thank you for the video, it's great and help a lot! When you have the PLY file with the numbers, there are values for X, Y and Z twice... one called "normal". What it means? My goal is to compare a superimposition of images that are not the same (comparison of a pre- and post-operative skull) and I want to take measurements of some specific points. When I obtain the data for each point, which of the values should I use to make the comparison? From the first row X, Y, Z or from the row called "normal X, Y, Z"? I don't know if you will understand my question, but I would really appreciate it if you could help!!
The first set of x-y-z is the 3D coordinate for a point. The normal x-y-z is telling you a direction. You can apply the same measurement tools between a point cloud and a surface too--for example if you have a set of cranial landmarks to represent one skull and a surface to represent the other.
@@terrie3D Thank you very much for responding! The "distance from reference mesh" function is not working in the version of the program that I was able to download. I'm having to use the Hausdorff distance tool. Even if you don't get the scale with negative numbers, is it a reliable analysis? Can I use the same colorize by vertix quality tool to obtain the heatmap?
@@bibianamello which version of Meshlab did you download? I am using 2022.02 and it is working. The Hausdorff distance tool is still good--it's just giving you an absolute value but if you can see the overlay of your meshes and see where one is inside the other then that lets you know the direction. Yes the colorize by vertex quality still works with the Hausdorff distance.
I'm using 2023.12 version.. but great! I think with that I have what I need! Thank you!!!@@terrie3D
@@terrie3D I'm using 2023.12... but great, I think I can get what I need this way! If you let me, one more question... I read on a forum that the first line of value (absolute measures) are measured in length units (for example millimeters). It is true? Can I consider the difference in point values as a difference in mm?
Hi, I have converted a Nifti file in to a dicom series, it loads in but the image i get is elongated and distorted . I have tried to load in the Nifti reader plugin but it does not appear as an option when loading in the file. I don't suppose you have any ideas on this. All the best,
Can you open the nifti in 3D Slicer and convert it to a NRRD volume?
@@terrie3D I am and it is not distorted! I assume I just follow the process in exactly the same way? Thank you so much, you are a superstar!
@@adamck93 I’m glad that worked! Yes you can drop the NRRD into Paraview and follow the same procedure.
Thank you so much for this tutorial. I am attempting to view only brain information and having hard time filtering to this view. Do you have any pointers?
The brain would need to come from an MRI. There is an extension in 3D Slicer called "Skull Stripper" that will create a binary label map of the brain which you can then input into the "HD Brain Extraction" extension along with the original MRI volume. This will create a new NRRD volume of the "Brain Mask" for you with all the grayscale values of the brain instead of just the binary. This can then be imported into Paraview to save the vdb or to create a point cloud. Another thing for me to make a video of!
Fantastic, thank you very much
is there any way to do this automatic ????
Yes there's a new module in 3D Slicer--I will make a video for that next!
thank you@@terrie3D
Is there a way to separate the brain and skull into two different pointclouds?
That should work. I’ll see if I can come up with a good workflow.
@@terrie3D would be extremely helpful :)
Hi Terrie, very nice video. The two meshes must be overlapped to be compared? How would one do that? Also, are there any software(s) that are able to compare two meshes without overlapping them? Thanks very much.
Thanks Carlo! You can still use Meshlab-you just have to align the meshes. I have a written tutorial that includes alignment here: github.com/terrielsimmons/Processing_Scans_in_Meshlab. I might make a video as well to demo something like scaling and aligning a photogrammetry scan with a laser scan.
I have finally made a video showing how to align 2 meshes in Meshlab! ruclips.net/video/30bJcj6yA4c/видео.htmlsi=L9hNo6I-5MZvSznx
@@terrie3D Thanks so much!
So cool!
Amazing !
Thank you!
WOW! You made this look so easy. Can't wait to give this a try. Great video!
Thanks Andrew!
Nice work, it’s a really responsive app!
Thank you!