Round 1 Case 1 / 10
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SLICE: 1/1
AXIAL
WW 400 / WL 40
AXIAL
SLICE: 1/1
CORONAL
WW 400 / WL 40
CORONAL
↕ Slice Navigation▼
AXIAL fit flip order
1
1 / 1
1
CORONAL fit flip order
1
1 / 1
1
Drag speed: 2
🔆 Window / Level▼
Active: AXIAL
WW400
WL40
Soft tissue
Portal
📏 Measurement Tools▼
📏Distance
⭕Ellipse
Crosshair
🤚Pan
Click tool to activate · click again or Esc to deactivate · Right-click or Esc to cancel in progress
No tool active: drag endpoints · right-click to delete
Round 1 — Difficulty Rating
Based on visual inspection of the CT, rate the overall ablation difficulty of this tumor from the perspective of an average interventional radiology centre, without advanced navigation tools.
1 = Very Easy 5 = Moderate 9 = Very Hard
Scroll: wheel change slice  ·  right-click drag ↕ fast scroll  ·  Ctrl + wheel zoom  ·  double-click reset view  ·  middle drag ↕ WW  ·  ↔ WL
HEPAR Score — Reference Table
HEPAR Score Table
🎯 Mark Target Tumor
Scroll to the best axial slice showing the tumor, then click on its center. The ring will appear in both panes.
Slice: 1 / 1
Ring diameter: mm
Study Instructions

🎯 Target Lesion

Each case contains one target lesion that needs to be assessed. At the start of each case, the target lesion is highlighted with a pulsing orange ring for 3 seconds.

Use the 🎯 Find target lesion button in the right panel at any time to navigate back to the target and replay the marker ring.

Round 1 — Difficulty Rating

Scroll through the axial and coronal slices to assess the tumor and its relationship to surrounding structures.

Please rate from the perspective of an average interventional radiology centre, without advanced navigation tools.

Round 2 — HEPAR Score

Use the Distance tool to measure distances, then assign the correct score range for each item in the right panel.

  • Maximum tumor diameter
  • Shortest distance: tumor margin → liver capsule (subcapsular)
  • Shortest distance: tumor margin → Heart/Lung, Stomach/Duodenum, Other GI organs (jejunum, ileum, colon, appendix), Adrenal gland
  • Shortest distance: tumor margin → Common/lobar hepatic bile duct or gallbladder
  • Shortest distance: tumor margin → Portal vein / IVC / hepatic veins

The total score and difficulty category update automatically: Easy 0-2 · Moderate 3-4 · Hard ≥5

🖱 Navigation Controls

Scroll slices
🖱 Mouse wheel
Fast scroll
Right-click drag ↕
Zoom in/out
Ctrl + wheel
Window width / level
Middle mouse ↕ ↔
Reset view
Double-click
Cancel measurement
Esc or Right-click