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Longitudinal Nodule Comparability

Compare lung nodule detection between two acquisition conditions for the same case. Diameter changes are flagged when they exceed measurement noise (2 mm), and each study is scored for acquisition reliability.

Select Study Comparison

Acquisition Reliability

Study A — baseline GREEN 0.0 pp degradation  •  Est. sensitivity 78.2%
Study B — thick_5mm RED 13.2 pp degradation  •  Est. sensitivity 65.0%
⚠ Comparison unreliable: acquisition degradation exceeds 10pp (baseline: GREEN, thick_5mm: RED). Diameter changes may reflect protocol variation, not biology.

Findings

⚠ Nodules Not Detected in Study B — 2 apparent disappearances

Centroid (46.9, -7.0, -21.2) mm  •  Diameter 4.1 mm  •  Confidence 0.963
Centroid (-88.3, 15.9, -36.4) mm  •  Diameter 6.5 mm  •  Confidence 0.954

Matched Nodule Pairs — 2 pairs

# Diam A Diam B Δ mm Δ % Conf A ⓘ Conf B ⓘ Centroid dist ⓘ Flag
1 7.9 mm 20.8 mm +12.94 +164.5% 0.998 0.994 1.8 mm exceeds noise threshold
2 6.0 mm 16.9 mm +10.83 +179.1% 0.759 0.931 1.0 mm exceeds noise threshold

Conf = model detection confidence (0–1)  •  Centroid dist = distance between matched nodule centers