How to Use the 3D Slicer Tool
Introducing the Slicer tool
3DICOM Mobile’s slicer tool enables you to cut through 3D views of your scans to reveal internal structures. Unlike scrolling through 2D slices in fixed planes, the slicer tool works directly in 3D view, allowing you to rotate the model and examine internal structures from multiple angles. This makes it faster and easier to explore what’s inside and understand how different structures relate to each other.
Before you begin
To access any scan on the 3DICOM Mobile app, make sure:
Your scan is first uploaded to your 3DICOM account via the web platform at my.3dicomviewer.comYou log in to the 3DICOM Mobile app using the same credentials as the web platform.You have a stable internet connection.
Scans will not appear in the 3DICOM Mobile app unless they have first been uploaded to your 3DICOM account.Understanding Anatomical Planes
What is a plane?
A plane is an imaginary flat surface used to divide the body into sections. Medical imaging uses three standard planes — Transverse (top–bottom), Sagittal (left–right), and Coronal (front–back) — as shown in the diagram below. These planes provide consistent reference points for slicing through a 3D scan.
Transverse plane (Top-Bottom)
A horizontal plane that cuts across the body, separating top (head) from bottom (feet).
Sagittal plane (Left-Right)
A vertical plane that divides the body into left and right sides.
Coronal plane (Front-Back)
A vertical plane that divides the body into front (chest) and back (backside).
In 3DICOM Mobile, these flat anatomical planes are represented by the white area on each of the slider icons (shown below).
The role of anatomical planes in slicing
The slicer tool cuts through your 3D scan along the three standard planes, using dedicated sliders. By moving a slider, you can ‘cut away’ portions of the scan from either side of that plane, allowing you to look deeper inside without losing the overall 3D context.
How each plane slider works in 3DCIOM Mobile
Transverse: Cuts horizontally through the scan, as if you were looking at it layer by layer from head to toe.Sagittal: Cuts vertically down the middle, separating the left side from the right side of the body.Coronal: Cuts vertically from front to back, showing the body from the chest through to the back.Slicer Tool in Action (Video)
How to Use the Slicer Tool
3DICOM Mobile’s slicer tool enables you to cut away sections of your scan along the three anatomical planes using Transverse, Sagittal, and Coronal sliders.
Instructions on how to use the three plane sliders are provided below.
Steps to get there:
1. Tap the ‘3D’ view option at the top of the screen to view your medical scan in 3D. The Slicer tool is only available in 3D view.
2. Tap the ‘Slicer’ option on the bottom toolbar. By default, the entire 3D Volume is visible and loads in on a top-down view. To get a better view, you can use a single finger gesture to reposition it. Try this article to learn more about navigating scans. 3. Select one of the three available anatomical planes to slice along: 
Changes may take a moment to apply depending on your device.
Positioning any two sliders too close together can slice away the entire volume, making the scan no longer visible. To restore it, adjust the sliders farther apart until the scan reappears.FAQs & Troubleshooting
Find answers to some of the most frequently asked questions about resetting and updating your 3DICOM account password below.
What do Transverse, Sagittal, and Coronal mean?
These are the three standard anatomical planes used in medical imaging:
- Transverse (axial): A horizontal plane that cuts across the body, separating top (head) from bottom (feet).
- Sagittal: A vertical plane that divides the body into left and right sides.
- Coronal: A vertical plane that divides the body into front (chest) and back (backside).
These planes are used in the slicer tool to let you move through your scan in consistent, easy-to-understand directions.
What is the slicer tool used for?
How is the Slicer Tool different from scrolling through 2D slices?
Why can’t I see my scan after slicing?
Can I adjust or move a slice after applying it?
How do I reset the model after slicing?
Can I change the angle of a slice with the slicer tool?
What settings work well with the slicer tool?
CONCLUSION
The slice tool helps you explore your scans in greater depth. When used in conjunction with 3D navigation, it provides you with powerful control over how you reveal and examine internal structures.
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