Multi-viewport & MPR

Grid layouts, sync controls, and 3D reconstruction.

Grid layouts

Pick 1×1, 1×2, 2×1, or 2×2 from the TopBar. Each tile is independently navigable unless sync is on.

Sync controls

• Sync Scroll — wheel events propagate to all tiles.
• Sync W/L — contrast adjustments propagate.

3D MPR

Toggle 3D MPR to reconstruct axial/sagittal/coronal planes from a volumetric series. Crosshairs link the same anatomical point across all tiles.

To keep the three narrow tiles legible, the corner metadata is decluttered in MPR: the axial panel shows a single-line summary (patient name, series/modality), the sagittal and coronal panels drop it entirely, and the series switcher is hidden. Because 2D structure overlays are tied to the original slice sequence, they don’t map to the reconstructed planes — the Overlays toggle is disabled in MPR. To inspect RTSTRUCT/SEG structures in 3D, use the centre-panel 3D structure view (point cloud, wireframe, or surface) instead.

Slab projections

In MPR the Projection control switches all three planes from the ordinary composite reconstruction to a slab projection — MIP (brightest voxel in the slab), MinIP (darkest), or Average (the mean) — with a shared slab thickness in millimetres. MIP suits contrast-filled vessels and lung nodules; MinIP suits airways and emphysema. The projection resets to Composite when you leave MPR or load another study. See Slab projection.

Volume rendering

The 3D VR view sits beside MPR in the same switcher and reuses the same reconstructed volume, so moving between them does not reload the series. Instead of three planes it casts a ray through the whole volume for every pixel and colours it through a preset transfer function, giving a rotatable 3D image: drag to rotate, right-drag to zoom, middle-drag to pan. It coarsens while you rotate and sharpens when you stop.

Nothing in that view corresponds to a single slice, so it carries no slice index, frame strip, or plane label, and the 2D tools — measurement, annotation, redaction, overlays — stay on the stack and MPR views, as do image export, share, and print. See 3D VR toggle and Volume render preset.

Caution Requires consistent slice spacing within the series.