case: thorax emphysema (airways) step-by-step guide · © 2018 vital images, inc. | | 1 case:...

Case: Thorax Emphysema (airways)Step-by-Step Guide

3D printing of the airway wall

M-06234BThe 3D printed anatomical model is not for diagnostic use.

Case Airways - Learning objectives

At the end of the session, the student will be able to:

1. Use and correct automatic segmentation – lung aiways using the generic Vitrea®

Advanced Visualization tools such as Vessel Grow, Dilate, Sculpt.

2. Generate, verify and improve a region shell as airway wall model.

3. Generate a .stl mesh model of the airway, preview the model in 3D and MPR viewers, save the model on disk.

4. Reuse the .stl airway model in an external software (such as Meshmixer).

5. Visualize the .stl model, change the rendering.

6. Apply a cut plane on the model, analyze the model, its dimensions, strength, orientation, modify the orientation and location for printing.

7. Export the modified .stl file, prepare for 3D printing, select printer or printing service.

Case: Thorax Emphysema: The full airway wall

1. Load case: Thorax emphysema – series ID 4.

2. Once the automatic segmentation of the lung and the airways is completed, uncheck the Lung region.

3. Choose the gray background.

4. For the selected airway region: tint/MPR, Show volume. Scroll in MPR (axial or coronal). See the imperfect segmentation.

5. To improve the airway segmentation, apply denoising – Medium (optional but beneficial).

6. Select MPR Window level showing a difference in gray levels between airways and lungs: for example: 800/-800HU.

7. Grow in the trachea or bronchus until you get more small branches than the automatic segmentation. (stop and backup if a blue selected blog appears in the lung)

8. Rename the region: Airways. Click “Add To” to create the new region.

9. Select Airways region in anatomy list, tint/MPR, show volume.

10. Check new branch. If OK, right click / Dilate 1X, Done.

11. Create shell.: Choose 2.5mm thickness. Check the shell in MPR. OK.

12. Trim airway wall branches with Sculpt tool in 3D. First, show volume. Draw around branches to trim. Send to Base (that is not segmented)

13. Export airway wall as .stl. Show in MPR/3D, preview .stl.

14. Choose export option 3. Export as .stl. Choose a directory.

15. Next step: open .stl in Meshmixer.

16. Meshmixer – prepare printing.

Select Thorax Emphysema (1). Applications Choose: Pulmonary Analysis (2). Ser#, Select 4 (3). Open case (4).

Lung and Airways are viewed (1). Uncheck Lung to show Airway (2).

Open Lt click menu, choose 3D Background Color (1). Choose gray background, adjust slider bar on Rt-View color in Box. Click OK (2). Gray Background final (3).

Check automatic segmentation. Hide lung region (2).

Improve auto segmentation: apply denoising Medium filter (1). Select WL MPR to distinguish lung vs. airways: 800/-800HU (2). Grow in trachea (MPR) to add more branches (3). AddTo (rename) to airway region (4).

Tint/MPR the airway region(1). Show volume (2). We added more branches (3).

Tint/MPR, show volume: we can dilate the selection 1X for more accurate diameter (1).

To dilate the airway region, select (1).

Dilate the selection 1X (1) for more accurate diameter. Click: “Done” (2)

After dilation: better airway lumen delineation.

Let us create the shell for the airway (1).

Choose a thickness larger than the slice thickness. Here,1.5mm is fine (1). If needed, click preview (2) to check before creating the new region.

Check the shell in 3D (1) and MPR.OK (2).

The new airway shell region has been created (1). The distal branches are closed. Let’s trim them.

Trim the airwall branches using Sculpt tool in 3D (1) and (2) Add selection to “Base” (=not segmented).

Let’s export the new airway shell region as a .stl file (mesh model) (1).

Choose the quality option 3 (1). Click Preview (2) to see the shell region as a .stl model in MPR and 3D.

The mesh model is now visible in 3D (1) and MPR (2).Click Save stl (3) to save the model on your disk.

Choose a location (directory) for the .stl file (1). OK (2).

The file has been saved.

Editing the 3D model

Use of Meshmixer software is for demonstration purposes only

Open Meshmixer and import the mesh model.

Check the mesh model. See object browser (list of .stl files for the same model).

3D rotation: right mouse buttonZoom = alt + right mouse buttonPan: alt + mouse wheel

Change the rendering - transparent: select ”Shader” (1). Drag icon into the model (2-3).

3D rotation: right buttonZoom = alt + right mouse buttonPan: alt + mouse wheel

Apply a cut plane on the model.

3D rotation: mouse wheel buttonZoom = alt + right mouse buttonPan: alt + mouse wheel

Move, orient cut plane (you can also draw a line outside the model).

After applying the cut plane.

Analyze the model – check defects. Here the model is ok.

Analyze the model – check dimensions – if needed, resize for printing.

Analyze the model – orient model for printing, adjust settings, update or accept.

Analyze the model – after model positioning on the printer tray.

Analyze the model – Visualize mechanical weaker areas.

Analyze the model – export as .stl- the modified model.

Printing menu – material selection, color selection and select printer

case: thorax emphysema (airways) step-by-step guide · © 2018 vital images, inc. | | 1 case:...

Documents

gas exchange and emphysema

subcutaneous emphysema

massive emphysema and pneumothorax following shoulder...

congenital lobar emphysema

trauma thorax

how to cure emphysema

the morphology of emphysema, chronic bronchitis, and ...2...

thorax - soundpure...-introduction to the thorax-thorax...

fully automated method for lung emphysema quantification...

thorax review

thorax overview

case report gastric emphysema a spectrum of pneumatosis...

thorax radiology

emphysema. causes of emphysema normal lung tissue stretches...

emphysema case study e3

stephania cormier, phd scorm1@lsuhsc.edu. outline asthma ...

bio168 emphysema presentation

(c.o.p.d) ch.bronchitis emphysema

emphysema imaging edit

radiological distribution of pulmonary emphysema ·...