Color maps and window presets

Choose a color map

Set separate defaults for grayscale and PET in Settings. The tool on the right changes the current view; Tiles synchronizes every cell. Colors do not change original pixels.

Select the star beside a color map to pin it to the top. Number keys follow the list order. Adding a favorite only reorders the list.

Choose, favorite and edit window presets

Select and apply a preset in the right-hand Windowing tool. In Settings → Window presets, click the star to favorite frequently used presets; favorites appear first. The enable switch controls whether a preset appears in the list.

Click Edit on a custom preset, change its name, window width (WW) and center (WL), then click Save or press Enter. Use Add for a new preset; Esc cancels editing. Editing or favoriting a preset does not change the current image window values; click the preset to apply it.

MR does not use CT window presets. Restoring defaults deletes custom presets; check the count before confirming. Deletion cannot be undone.

Reset window values

Reset 2D windowing to restore its initial values. CT 3D uses separate volume presets.

Advanced: JSON file and migration

Presets are stored locally in window-presets.json. In Settings → Window presets, choose Open file location, edit the file and click Reload without restarting. Adding, saving, favoriting or enabling presets in the app also updates this file. Up to 100 presets are supported. Reloading only updates the list, not the current image window values. Invalid files leave the current list intact and display the reason.

The JSON root contains schemaVersion: 1 and a presets array. Each entry contains a unique presetId, name label, window width width (WW), center center (WL) and enable state enabled. An empty label uses the localized name for built-in CT presets; entered text overrides it. Array order determines normal ordering, favorites appear first, and enabled: false hides a preset.

Example fields: presetId: custom-lung, label: Lung, width: 1500, center: -600, enabled: true. Width must be 1–1000000 and center −1000000–1000000; names must be unique.

The 13 default CT presets are brain, lung, bone, soft tissue, mediastinum, abdomen, liver, subdural, narrow brain, posterior fossa, temporal bone, spine soft tissue and spine bone. They are starting points for adjustment. Older custom presets and enable states migrate automatically. The first upgrade adds new defaults while retaining existing values, names and enable states; presets deleted afterward do not return on restart.