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Coming Soon: PET/CT SUV Tools – Volumetric SUV & Fusion ROI Fix

· 2 min read

Overview​

PET/CT SUV measurement gets a dedicated Volumetric SUV tool with a full-view region overlay and adjustable thresholds, plus a fix so every ROI tool reports SUV correctly on fused viewports.

What's New​

1. Volumetric SUV Becomes Its Own Tool​

What changed:​

The Probe tool is back to reporting a plain point SUV value on PET data, just as it does on any other modality. Lesion segmentation now lives in its own Volumetric SUV tool, available from the toolbar, the Image Control Wheel, or a custom hotkey. Clicking a lesion automatically segments the region, reports SUV max/mean/peak and volume, overlays the boundary across every plane and the whole-body MIP, and lets you adjust the segmentation threshold or SUV normalization on the fly.

Benefit:​

A quick point SUV check with Probe, and a dedicated tool with visual confirmation and adjustable thresholds when you need volumetric measurement.

2. PET/CT Fusion ROI Tools Now Report SUV, Not HU​

What changed:​

Rectangle, Elliptical, Circle, and Freehand ROI tools drawn on a fused PET/CT viewport now report SUV statistics instead of Hounsfield Units, matching what the same tool reports on a PET-only viewport.

Benefit:​

SUV measurement is now consistent across every ROI tool in Fusion Mode — no more switching viewports just to get a valid SUV reading.

Important Notes​

  • Volumetric SUV Tool: A newer capability that may not yet be enabled in every environment — reach out to your OmegaAI representative if it doesn't appear in your toolbar. Measurements created by the Probe tool before this change remain labeled as Probe entries.
  • SUV safety fallback: A "SUV unavailable" indicator with hidden SUV stats is expected behavior when a study's DICOM metadata can't support SUV calculation — it isn't an error.

Where to Find It​

  • Volumetric SUV Tool: Image Viewer → Probe toolbar group (Fusion Mode) → Volumetric SUV; also available via the Image Control Wheel and Hotkey Customization
  • Fusion ROI SUV: PET/CT Fusion Mode → draw any ROI tool on the fused viewport