Clinical Scorecard: Feature-based Analysis of Fibrotic Lesions in CT Imaging: A Conceptual Study on Predicting Gene Expression Distribution

At a Glance

Key Highlights

• IIP includes several categories with varying prognosis; IPF has the poorest prognosis and high mortality with acute exacerbations.
• HRCT imaging is standard for diagnosing IIPs but has limitations due to inter-observer variability and difficulty in accurate classification.
• The HP method quantifies fibrotic lesions by calculating Betti numbers representing connectivity and holes in CT image binary segments, potentially improving diagnostic accuracy.

Guideline-Based Recommendations

Diagnosis

• Use HRCT imaging to identify typical fibrotic patterns such as traction bronchiectasis and honeycomb lung indicative of IPF.
• Apply homology-profile (HP) method to HRCT images to quantify fibrotic lesions by analyzing connectivity features (Betti numbers).
• Consider standardized thresholding between −700 to −400 HU for binarization in HP analysis.

Management

• Recognize the poor prognosis of IPF and the importance of accurate diagnosis to guide treatment strategies.
• Use quantitative imaging features to assist in differentiating fibrotic lesions from other lung abnormalities.

Monitoring & Follow-up

• Monitor fibrotic lesion progression using serial HRCT imaging and homology-based feature mapping to assess changes in lesion connectivity and morphology.

Risks

• Inter-observer variability in HRCT interpretation may lead to diagnostic inaccuracies.
• Presence of interstitial lung abnormalities (ILAs) and lung cancer lesions can confound fibrotic lesion quantification.

Patient & Prescribing Data

Patients with idiopathic interstitial pneumonia and COVID-19 exhibiting fibrotic lung lesions

Quantitative imaging biomarkers derived from HP method may support clinical decision-making but no direct treatment data provided.

Clinical Best Practices

• Employ HRCT imaging with standardized protocols for lung field extraction and image preprocessing.
• Utilize homology-profile method with validated tile size (32×32 pixels) and shifting (8 pixels) for detailed fibrotic lesion mapping.
• Exclude lung cancer lesions and obvious lung abnormalities when analyzing fibrotic lesions to reduce noise in quantification.

References

• Idiopathic interstitial pneumonia classification and prognosis
• HRCT imaging features of IPF
• Homology-profile method for tumor cell detection
• Cancer Imaging Archive datasets