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Showing content with the highest reputation since 02/15/2019 in all areas

  1. 2 points
    3D modeling and printing from US data is pretty much the same as from CT... using treshold technique and generating mesh. The biggest problem, for now, is how to open DICOM data obtained from US because it differs to one obtained from CT in one of the software for sliceing (3D Slicer). For now, in 3D slicer you can open DICOM data from GE machines and Philips but people are working on enabling importing DICOM data from other manufacturers. Hope this helps a little bit
  2. 2 points
    I've only printed the skull, but it came out very well (see my comment), I haven't had to clean none of the surfaces of the file. Again, thanks for sharing this file 🙂
  3. 2 points
    DIBENDUJOY

    vikram

    Version 1.0.0

    153 downloads

    craniotomy, stl, 3d, model, printable, parietal, frontal, temporal, occipital, orbit, nasal, bones, maxilla, craniotomy, neurosurgery, sutures, mastoid, apophysis

    Free

  4. 1 point
    If you want FDM printing with many colors you should consider the da Vinci Color from XYZ printing (https://www.xyzprinting.com/de-DE/product/da-vinci-color). The print quality is OK for an FDM printer. They are also not very reliable (compared to something like a Prusa MK3). But you can print with many colors and they lowered the prizes a bit.
  5. 1 point
    There seems to be lots of interest in this community regarding 3D printing from ultrasound images. Does anybody know of resources available to show how to do it? I'm sure many here would be interested.
  6. 1 point

    From the album: embodi3D 3D Printed Models

    Video showing flow testing performed in an elastic 3D printed sheep heart model
  7. 1 point

    Version 1.0.0

    405 downloads

    This 3D printable model of a human heart was generated from a contrast enhanced CT scan. This model is an improvement over a prior version (here). It shows the heart with slices cut in the anatomical transverse plane. If you are interested in a heart with short-axis slices, check out my short-axis stackable slice model here. Notches have been added to ensure the slices fit together and do not slide against each other. The model demonstrates the detailed anatomy of the human heart in exquisite detail. Each slice stacks on top of the prior slice to form a complete human heart. Individual slices show the detailed cardiac anatomy of the right and left ventricles, and right and left atria, and outflow tracts. Perfect for educational purposes. It has been validated as printable on an Ultimaker 3 Extended printer. Technical parameters: manifold STL (watertight) vertices: 462576 triangles: 925800 dimensions: 15.1 x 15.2 x 10.5 cm

    $19.99

  8. 1 point

    Version 1.0.0

    34 downloads

    This 3D printable model of a normal human heart was generated from an ECG-gated contrast enhanced coronary CT scan. The slices are cut to illustrate the echocardiographic short-axis view. If you are interested in a 3D printable heart that shows slices in the anatomical transverse plane, click here. Notches have been added to ensure the slices fit together and do not slide against each other. The model demonstrates the detailed anatomy of the human heart in exquisite detail. Each slice stacks on top of the prior slice to form a complete human heart. There is a sturdy and stable base. Individual slices show the detailed cardiac anatomy of the right and left ventricles, and right and left atria, and outflow tracts in echocardiographic short-axis projection. Perfect for educational purposes. Technical parameters: Individual STLs: 4 Mesh integrity: manifold STL (watertight) vertices: appx 550k per object triangles: appx 1.1M per object dimensions: 11.4 x 9.1 x 10.6 cm

    $19.99

  9. 1 point

    Version 1.0.0

    3 downloads

    This file contains two printable circle of willis models. One is at life size and another magnified. It has been printed using Form 2 SLA printer and the second image is of the large model with support structures under xray which looks like cerebral angiography. Anterior parietal artery, Pericallosal artery, Posterior parietal artery, Artery of the angular gyrus, Posterior temporal artery, Second segment of the middle cerebral artery, Anterior communicating artery of the cerebrum (obscured by a vascular arch), First segment of the middle cerebral artery (sphenoid part), Temporal polar artery, Frontal orbital artery, Internal carotid artery, 3d, model, printable, .stl

    $5.00

  10. 1 point

    From the album: embodi3D 3D Printed Models

    This stackable heart with short-axis slices was 3D printed for a customer with strong red plastic. The print turned out great! The file can be downloaded here. To learn more about embodi3D's specialized medical 3D printing services, click here.
  11. 1 point
    Hello the Biomedical 3D Printing community, it's Devarsh Vyas here writing after a really long time! This time i'd like to share my personal experience and challenges faced with respect to medical 3D Printing from the MRI data. This can be a knowledge sharing and a debatable topic and I am looking forward to hear and know what other experts here think of this as well with utmost respect. In the Just recently concluded RSNA conference at Chicago had a wave of technology advancements like AI and 3D Printing in radiology. Apart from that the shift of radiologists using more and more MR studies for investigations and the advancements with the MRI technology have forced radiologists and radiology centers (Private or Hospitals) to rely heavily on MRI studies. We are seeing medical 3D Printing becoming mainstream and gaining traction and excitement in the entire medical fraternity, for designers who use the dicom to 3D softwares, whether opensource or FDA approved software know that designing from CT is fairly automated because of the segmentation based on the CT hounsifield units however seldom we see the community discuss designing from MRI, Automation of segmentation from MRI data, Protocols for MRI scan for 3D Printing, Segmentation of soft tissues or organs from MRI data or working on an MRI scan for accurate 3D modeling. Currently designing from MRI is feasible, but implementation is challenging and time consuming. We should also note reading a MRI scan is a lot different than reading a CT scan, MRI requires high level of anatomical knowledge and expertise to be able to read, differentiate and understand the ROI to be 3D Printed. MRI shows a lot more detailed data which maybe unwanted in the model that we design. Although few MRI studies like the contrast MRI of the brain, Heart and MRI angiograms can be automatically segmented but scans like MRI of the spine or MRI of the liver, Kidney or MRI of knee for example would involve a lot of efforts, expertise and manual work to be done in order to reconstruct and 3D Print it just like how the surgeon would want it. Another challenge MRI 3D printing faces is the scan protocols, In CT the demand of high quality thin slices are met quite easily but in MRI if we go for protocols for T1 & T2 weighted isotropic data with equal matrix size and less than 1mm cuts, it would increase the scan time drastically which the patient has to bear in the gantry and the efficiency of the radiology department or center is affected. There is a lot of excitement to create 3D printed anatomical models from the ultrasound data as well and a lot of research is already being carried out in that direction, What i strongly believe is the community also need advancements in terms of MRI segmentation for 3D printing. MRI, in particular, holds great potential for 3D printing, given its excellent tissue characterization and lack of ionizing radiation but model accuracy, manual efforts in segmentation, scan protocols and expertise in reading and understanding the data for engineers have come up as a challenge the biomedical 3D printing community needs to address. These are all my personal views and experiences I've had with 3D Printing from MRI data. I'm open to and welcome any tips, discussions and knowledge sharing from all the other members, experts or enthusiasts who read this. Thank you very much!
  12. 1 point
    NRRD is a file format for storing and visualizing medical image data. Its main benefit over DICOM, the standard file format for medical imaging, is that NRRD files are anonymized and contain no sensitive patient information. Furthermore NRRD files can store a medical scan in a single file, whereas DICOM data sets are usually comprised of a directory or directories that contain dozens if not hundreds of individual files. NRRD is thus a good file for transferring medical scan data while protecting patient privacy. This tutorial will teach you how to create an NRRD file from a DICOM data set generated from a medical scan, such as a CT, MRI, ultrasound, or x-rays. To complete this tutorial you will need a CD or DVD with your medical imaging scan, or a downloaded DICOM data set from one of many online repositories. If you had a medical scan at a hospital or clinic you can usually obtain a CD or DVD from the radiology department after signing a waiver and paying a small copying fee. Step 1: Download Slicer Slicer is a free software program for medical imaging. It can be downloaded from the www.slicer.org. Once on the Slicer homepage, click on the Download link as shown in Figure 1. Figure 1 Slicer is available for Windows, Mac, and Linux. Choose your operating system and download the latest stable release as shown in Figure 2. Figure 2: Download Slicer Step 2: Copy the DICOM files into Slicer. Insert your CD or DVD containing your medical scan data into your CD or DVD drive, or open the folder containing your DICOM files if you have a downloaded data set. If you navigate into the folder directory, you will notice that there are usually multiple DICOM files in one or more directories, as shown in Figure 3. Navigate to the highest level folder containing all the DICOM files. Figure 3: There are many DICOM files in a study Open Slicer. The welcome screen will show, as demonstrated in Figure 4. Left click on the folder that contains the DICOM files and drop it onto the Welcome panel in Slicer. Slicer will ask you if you want to load the DICOM files into the DICOM database, as shown in Figure 5. Click OK Slicer will then ask you if you want to copy the files or merely add links. Click Copy as shown in Figure 6. Figure 4: Drag and drop the DICOM folder onto the Slicer Welcome window. Figures 5 and 6 After working for a minute or two, Slicer will tell you that the DICOM import was successful, as shown in Figure 7. Click OK Figure 7 Step 3: Open the Medical Scan in Slicer. At this point you should see a window called the DICOM Browser, as shown in Figure 8. The browser has three panels, which show the patient information, study information, and the individual series within each study. If you close the DICOM Browser and need to open it again, you can do so under the Modules menu, as shown in Figure 9. Figure 8: DICOM Browser Figure 9: Finding the DICOM browser Each series in a medical imaging scan is comprised of a stack of images that together make a volume. This volume can be used to make the NRRD file. Modern CT and MRI scans typically have multiple series and different orientations that were collected using different techniques. These multiple views of the same structures allow the doctors reading the scan to have the best chance of making the correct diagnosis. A detailed explanation of the different types of CT and MRI series is beyond the scope of this article, but will be covered in a future tutorial. Click on the single patient, study, and a series of interest. Click the Load button as shown in Figure 8. The series will then begin to load as shown in Figure 10. Figure 10: The study is loading Step 4: Save the Imaging Data in NRRD Format Once the series loads you will see the imaging data displayed in the Slicer windows. Click the Save button on the upper left-hand corner, as shown in Figure 11. Figure 11: Click the Save button The Save Scene dialog box will then appear. Two or more rows may be shown. Put a checkmark next to the row that has a name that ends in ".nrrd". Uncheck all other rows. Click the directory button for the nrrd file and specify the directory to save the file into. Then click the save button, as shown in Figure 12. Figure 12: Check the NRRD file and specify save directory. The NRRD file will now be saved in the directory you specified!
  13. 1 point
    Great!! I did a half print on the Stratasys printer in our lab. A beautiful brain model.
  14. 1 point
    MFudge

    Nasal cavity with paranasal sinuses

    Printed using a SLS sPro60. turned out fantastic.
  15. 1 point

    Version 1.0.0

    0 downloads

    WZ anterior mandible - stl file processed Have embodi3D 3D print this model for you. Learn More. This file was created with democratiz3D. Automatically create 3D printable models from CT scans. Learn more. lower, teeth, tooth, dental, dentistry, mandible, angle, body, upper, 3d, model, .stl, bone

    Free

  16. 1 point
    MMMMATT

    Spine full

    Version 1.0.0

    128 downloads

    from cat scan, bone, stl, dicom, 3dmodel, lumbar, spine, vertebrae,

    Free

  17. 1 point
    Agreed. This limit was put in place to prevent abuse for free downloads, but should not apply to paid items. We are working on a fix. You should now be able to download your files. Thank you for letting us know about this issue.
  18. 1 point

    From the album: embodi3D 3D Printed Models

    This skull with left MCA aneurysm was printed by embodi3D for a customer who wants to use the model for simulating neurosurgical aneurysm clipping.
  19. 1 point
    We 3D printed this model for a customer and the print turned out beautifully. The parts stack nicely and by opening them up, you can clearly see the detailed structures inside the heart chambers. To learn more about our 3D printing service, click here. Here is another print we did in flexible material at 2/3 scale, as requested by the customer. The flexible material has a soft, rubbery feel that is very nice to handle.
  20. 1 point
    kopachini

    Skull is seen as two shells

    Dear olatif2 when in blender, choose edge select and then ALT + LMB/RMB (depending your preferences) and it should select whole edge (tabula externa) than try SHIFT+ALT+LMB/RMB and select tabula externa and than when both edges are selected pres F and sgould get a facet (closed gap). Or faster way would be to add a new object (cube), size it up, put it below both edges and boolean operation difference and should get closed edges of the skull but slightly lower model than it would be at first.
  21. 1 point
    We recently 3D printed a multimaterial skull with MCA aneurysm from a CTA head for customer who needed the skull in rigid plastic and the vessels and aneurysm in flexible material. The model will be used by neurosurgeons to practice intracranial aneurysm clipping surgery. To properly simulate the surgery, the skull needs to be hard and the vessels elastic. Combining two materials (and two printers!) provides the best solution. The model was created on democratiz3D. You can learn more about embodi3D's printing service here.
  22. 1 point

    From the album: embodi3D 3D Printed Models

    This skull with left MCA aneurysm was printed by embodi3D for a customer who wants to use the model for simulating neurosurgical aneurysm clipping.
  23. 1 point

    From the album: embodi3D 3D Printed Models

    This skull with left MCA aneurysm was printed by embodi3D for a customer who wants to use the model for simulating neurosurgical aneurysm clipping.
  24. 1 point

    Version 1.0.0

    28 downloads

    Kidney 3D .stl file extracted from slicer 3D sample data

    Free

  25. 1 point

    Version 1.0.0

    12 downloads

    Segmented lumbar spine and sacrum, young adult. This includes L1 through L5 vertebral bodies and the sacrum .STL files for the intervertebral disks and pelvis are available as a separate download.

    $6.00

  26. 1 point
    Great tutorial, very complete and well thought out. Do you prefer 3Dslicer to Horos? Are there advantages or quality differences worth mentioning? Will the Democtatiz3D app offer vasculature as an operation in the future?
  27. 1 point

    Version 1.0.0

    6 downloads

    spinosa - stl file processed This file was created with democratiz3D. Automatically create 3D printable models from CT scans. Learn more.

    Free

  28. 1 point
    Nice model of brain. It definitely needs supports. The printing on Prusa i3 MK3 consumed almost whole 1kg of filament and 90hrs of time (PLA filament 1.75mm, OPTIMAL print 0.15mm, with supports). Unfortunately I chose supports above the pad only, not everywhere, so there are some ugly places above the temporal lobes. It is a pity that the cerebellum is missing. Thanks!
  29. 1 point

    Version 1.0.0

    14 downloads

    cat scan - stl file processed, back, leg, pelvis, stl, 3dmodel, bone, vetrinary, tail, column, lumbar

    Free

  30. 1 point

    Version 1.0.0

    4 downloads

    test - stl file processed This file was created with democratiz3D. Automatically create 3D printable models from CT scans. Learn more. skull, head, osteology, bone, 3d, model, .stl, printable, frontal, parietal, temporal, zygomatic, arch, maxilla, upper, teeth, orbit, veterinary, animal

    Free

  31. 1 point
    ExplorationArchitect

    Horse head

    Version 1.0.0

    19 downloads

    this is a horse head, maxilla, mandible, orbit, eye, brain, sinus, nasal, septum, teeth, veterinary, animal, ct, without, contrast 3d, model, dicom

    Free

  32. 1 point

    Version 1.0.0

    25 downloads

    Cat Skull - stl file processed This file was created with democratiz3D. Automatically create 3D printable models from CT scans. Learn more.3d skull, stl, bone, cat, zygomatic arch, temporal, frontal, parietal, maxilla, mandible, teeth, canine, cervical, spine, orbit, auditory, canal, inner, occipital, 3d, model, printable

    Free

  33. 1 point
    Great blog! Its the easiest way in which someone must have explained the difference between CT scan and MRI scan. Thanks for sharing such a wonderful blog, most of the people would like it. I would also like to know the difference between Ultrasound, MRI, and CT scan.
  34. 1 point
    Here are two volumes obtained by GE Voluson E10 and exported as .stl file. I think that a lot depends on fetal head position and gestation age if you want to have nice fetal face model. Personally, I wasn't present when study was made.
  35. 1 point
    I contacted one private clinic in my city which has 3D US, and they are apparently really good at it. They told me that they are too busy right now so I couldn't obtain new DICOM data, but I will call them again and ask them if I could come. But the doctor who works there told me that they have GE Voluson S10 (newest model) which have build in the possibility to save study as .stl file... same as Philips IntelliSpace portal that was told before. I did a little bit of research and really there it is, but not for S10, yet for E10 model: http://www3.gehealthcare.com/en/products/categories/ultrasound/voluson/voluson_e10#tabs/tab44799EF6884146E1A27A6929FCAB17D5 Keep your fingers crossed so I could have a glance at that machine in a very soon time
  36. 1 point
    Dr. Mike

    Holes in bone models with democratiz3D

    I received this inquiry from a member. I am going to post the response here so that it can help others with the same question: QUESTION: "I am printing out a spine model.... Why are there so many defects in the rendering? I can't print this out on a 3d printer, half of the vertebrae are hollow. I get these from a 3d CT and on a computer monitor, the vertebrae are whole. Just take a look at the thumbnails and you'll know what I'm talking about. I don't have the expertise or time to fill all of the defects. Is there a paid service somewhere that could do this for me? I'm just surprised the STL file wouldn't look like the 3d CT since they use the same dicom imagery?" ANSWER: If you are creating bony models and are finding that the bones have holes or other large defects in them (see above), this is probably an issue with the Threshold value used during the conversion. Threshold is the number of Hounsfield units to use to create the surface of the model. Anything above the threshold value is considered bone and is included. Anything below is not considered bone and is excluded. Normal cortical bone is very dense, greater than 300 Hounsfield units, so the default threshold of 150 is more than enough to catch it. The inside of the bone (medullary, or marrow cavity) is filled with fatty bone marrow and is a much lower Hounsfield value. If the patient has osteoporosis or very thin cortical bones they may not register as bone if the default threshold of 150 is used. You can decrease this to a lower threshold value (maybe 100 or so) and you will be more likely to capture this thin, deossified bone. If you go too low though (60 or so) you will start to capture non-bony structures like muscle. Another thing that may help get the highest quality models is using premium operations such as Very Detailed Bone and Ultra quality level. These operations are time-consuming however. To save on time, you can run your scan through democratiz3D using free operations such as Detailed Bone and medium or high quality until you find the threshold you like. Once you find the threshold value you like, you can run you scan through a final time using the highest quality (and slowest) operation settings, such as Very Detailed Bone and Ultra quality. Hope this helps! Dr. Mike
  37. 1 point
    Dr. Mike

    Holes in bone models with democratiz3D

    I'd like to elaborate on this topic a bit, as I recently had another member inquire about this issue. The member was creating a model from a CT scan of the clavicles. As you can see, there are holes in the medial (midline) ends of both clavicles. What is causing this? Is it a problem with democratiz3D? How can it be fixed? The issue lies with the patient's anatomy and the quality of the original CT scan. In the human body there are areas where bones are naturally very thin. Sometimes, the bone surface (cortex) can be paper thin. Also, some patients who have conditions like osteoporosis may have very little calcium in their bones. Issues like this make it very hard for the CT scanner to detect the bone wall, as you can see from the image below which shows the area on the left clavicle that has a hole in the final model (red arrow). The problem isn't with democratiz3D, but with the quality of the CT scan or with the patient having thin bones (how dare they!). democratiz3D is actually creating the model exactly as it appears on the CT, its just that the CT has holes we don't want! So, what can be done? If you encounter this problem you have two options. 1) Manually fix the holes in the model with a mesh editor like Meshmixer, or 2) decrease the threshold value in democratiz3D and re-process the scan. Decreasing the threshold tells the system to capture more voxels in your model, potentially capturing more thin or osteoporotic bone. But, be careful. If you reduce the threshold too much (less than 100), you run the risk of starting to capture muscle, organs, and vessels in your bone model. If you are not sure what threshold to use, you can experiment by running your scan through democratiz3D using different thresholds. To save time, I suggest you do this on low or medium quality setting. When you find a threshold that works, you can generate your final model using a higher (and more time consuming) quality setting, like High or Ultra. If you are familiar with mesh editing software, that is probably the fastest way to correct this problem. Just delete the edge of the hole, fill it in with a new face, and run a quick smooth operation on the area. It's a 1 minute fix if you know the keyboard shortcuts. I hope this tip helps. Dr. Mike
  38. 1 point

    Version 1.0.0

    31 downloads

    The Venous Drainage of the Central Nervous System. Model from MRI data. Anatomy plate from Gray's Anatomy.

    Free

  39. 1 point

    Version 1.0.0

    62 downloads

    Dog Skull - stl file processed,k9, stl, animal, maxilla, 3dmodel, skull, dog, head, bone

    Free

  40. 1 point
    Gustavo

    CT cat Spine

    Version 1.0.0

    12 downloads

    CT cat Spine, thoracic, lumbar, stl, 3dmodel, print, animal, veterinary

    Free

  41. 1 point

    Version 1.0.0

    7 downloads

    Pelvis scan - stl file processed

    Free

  42. 1 point
    DJB

    Knee Condyles

    From the album: 3D Metal Printed Parts

    3D Printed Knee Condyles
  43. 1 point

    Version 1.0.0

    29 downloads

    This model is the right lower extremity bone rendering of a 65-year-old male with left thigh myxoid fibrosarcoma. At the time of diagnosis, the patient had metastases to his lungs. The patient therefore underwent neoadjuvant radiotherapy, surgery, and adjuvant chemotherapy and was found to have an intermediate grade lesion at the time of diagnosis. The patient is still living with the metastatic disease at 2.5 years since diagnosis. This is an STL file created from DICOM images of his CT scan which may be used for 3D printing. The leg includes the area between the knee and the ankle and houses the tibia and fibula. The proximal tibia includes the medial plateau (which is concave) and the lateral plateau (which is convex). The Proximal tibia has a 7-10 degree posterior slope. The tibial tuberosity is located on the anterior proximal tibia, which is where the patellar tendon attaches. On the anteromedial surface of the tibia is Gerdy's tubercle, where the sartorius, gracilis, and semitendinosus attach. The distal tibia creates the superior and medial (plafond and medial malleolus) of the ankle joint. The proximal fibula is the attachment for the posterolateral corner structures of the knee joint. The peroneal nerve wraps around the fibular neck. The distal fibula is the lateral malleolus and a common site for ankle fractures. The ankle is a hinge (or ginglymus) joint made of the distal tibia (tibial plafond, medial and posterior malleoli) superiorly and medially, the distal fibula (lateral malleolus) laterally and the talus inferiorly. Together, these structures form the ankle “mortise”, which refers to the bony arch. Normal range of motion is 20 degrees dorsiflexion and 50 degrees plantarflexion. Stability is provided by the anterior talofibular ligament (ATFL), calcaneofibular ligament (CFL), and posterior talofibular ligament (PTFL) laterally, and the superficial and deep deltoid ligaments medially. The ankle is one of my most common sites of musculoskeletal injury, including ankle fractures and ankle sprains, due to the ability of the joint to invert and evert. The most common ligament involved in the ATFL. The foot is commonly divided into three segments: hindfoot, midfoot, and forefoot. These sections are divided by the transverse tarsal joint (between the talus and calcaneus proximally and navicular and cuboid distally), and the tarsometatarsal joint (between the cuboids and cuneiforms proximally and the metatarsals distally). The first tarsometatarsal joint (medially) is termed the “Lisfranc” joint, and is the site of the Lisfranc injury seen primarily in athletic injuries. This model was created from the file STS_022.

    Free

  44. 1 point
    Pictures from the 2017 Mayo Collaborative 3D Printing in Medical Practice Conference held in Scottsdale Arizona in March 2017.
  45. 1 point
    tsehrhardt

    Materials for fracture experiments

    I was wondering if anybody has found a 3D printing material that works well for fracture studies. I am aware of Sawbones, but would like to explore the possibility of using CT scans to generate 3D printed bones of different size/age/sex for fracture/trauma studies. Thanks! Terrie
  46. 1 point
    Hi Dr Mike , In principal, is it the same procedure using 3D ultrasound DICOM files? Many thanks upfront Tom
  47. 1 point

    135 downloads

    This 3D printable STL file of the splenic artery shows three aneurysms. This model was created from a CT scan and used in pre-surgical testing. It accompanies the blog article Saving a Spleen with 3D Printing: Pre-Surgical Planning with Medical Models make "Impossible" Surgeries Possible. The file is distributed under the Attribution-NonCommercial-NoDerivs license. If you wish to use this file for commercial purposes, please contact the author.

    Free

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