Slab projection (MIP / MinIP)

Project a slab of voxels through the MPR planes instead of showing one plane.

Browser: available nowmacOS app: 1.1.0 or newer

Available in 3D MPR only. Instead of showing a single reconstructed plane, each of the three planes projects a slab of voxels:

• Composite — the ordinary reconstruction. No slab.
• MIP (maximum intensity) — keeps the brightest voxel along each ray. Contrast-filled vessels and lung nodules stand out of surrounding tissue.
• MinIP (minimum intensity) — keeps the darkest voxel. Airways, emphysema, and other air- or fluid-filled structures stand out.
• Average — the mean along each ray, which reads as a smoothed thick slice.

Slab thickness sets how deep the projection reaches, in millimetres, and applies to MIP, MinIP and Average. Thin slabs stay close to the original plane; thick slabs summarise more anatomy but bury small dark detail under bright voxels (and the reverse under MinIP). All three planes share one mode and one thickness — they reconstruct a single volume.

The projection returns to Composite when you leave MPR or load a different study.

Caution A projection is a summary of many voxels, not a slice that exists in the file. Measure and window on Composite.