How to Adjust Display Settings

What does the Contrast adjustment do?

Contrast adjusts the difference between lighter and darker areas of your scan. Higher contrast makes tissue boundaries stand out, while lower contrast softens the image for a smoother look.

The contrast slider ranges from 0 to 100 and resets to 0 each time you open a scan, representing the default contrast. Higher values increase the difference between light and dark areas, while lower values reduce it for a softer appearance.

How to adjust Contrast

Steps to get there:

1. Tap the ‘Display’ option on the bottom tool bar.

2. Tap the ‘Contrast’ option to enable the slider.

3. Use your finger to drag the slider right to increase contrast of the image or left to decrease it.

The slider can be positioned anywhere between 0 and 100 and is set to 0 by default whenever you open a scan.

Changes may take a moment to apply depending on your device.

What does the Windowing adjustment do?

Windowing fine-tunes the range of grey values displayed, allowing you to focus on specific tissues (for example, bone versus soft tissue). This adjustment can reveal details that are not as clear with brightness and contrast alone.

The windowing tool starts at a default threshold range of Lower -512, and Upper 512, each time you open a scan. Adjusting the sliders changes which grey values are displayed. Increasing the window range allows you to see more structures at once, while narrowing the range helps emphasise specific tissues such as bone or soft tissue.

How to adjust Windowing

Steps to get there:

1. Tap the ‘Windowing’ option on the bottom toolbar.

2. Use your finger to reposition the two sliders to adjust the visible range of grey values.

Widening the range shows more overall detail, while narrowing it makes certain structures stand out more clearly.

Changes may take a moment to apply depending on your device.

What do Presets do?

Presets in 3D view apply predefined brightness, contrast, windowing, and opacity values for common viewing needs. They provide a quick way to optimise your image without adjusting each setting manually.

How to adjust Presets
(3D view only)

Steps to get there:

1. Tap the ‘3D’ view option at the top of the screen to view your medical scan in 3D.

2. Tap the ‘Windowing’ option on the bottom toolbar.

3. Tap the drop-down under the Preset heading.

4. Use your finger to scroll through the list of available presents. And select a preset to apply it.

Changes may take a moment to apply depending on your device.

What does the Opacity adjustment do?

Opacity is available when viewing scans in 3D. It controls how transparent or solid the tissues appear, helping you ‘see through’ outer layers to better explore the internal structures of your scan.

The opacity slider can be set between 0 and 100 and resets to 100 each time you open a scan in 3D, meaning the image starts fully opaque.

How to adjust Opacity
(3D view only)

Steps to get there:

1. Tap the ‘3D’ view option at the top of the screen to view your medical scan in 3D.

2. Tap the ‘Opacity’ option on the bottom toolbar.

3. Use your finger to drag the slider left or right to decrease or increase the opacity.

Lowering the opacity value makes structures more transparent, while increasing it keeps them more solid.

Changes may take a moment to apply depending on your device.

Setting opacity to 0 will make your scan invisible.