Quantitative computed tomographic indexes in diffuse interstitial lung disease: correlation with physiologic tests...

Area of Science:

• Radiology and Imaging
• Pulmonology
• Medical Diagnostics

Background:

• Diffuse interstitial lung disease (DILD) diagnosis and monitoring often rely on subjective assessments.
• Objective quantification of lung abnormalities and function is crucial for accurate DILD management.

Purpose of the Study:

• To evaluate the correlation between quantitative CT indexes, spirometric pulmonary function tests (PFTs), and visual scores (VSs) in DILD patients.
• To determine the utility of CT quantification in predicting pulmonary function impairment.

Main Methods:

• 157 DILD patients and 23 controls underwent volume thin-section CT and PFTs.
• Quantitative CT indexes (e.g., total lung volume, functioning lung volume) and VSs were measured.
• Pearson correlation analysis assessed relationships between CT indexes, PFTs, and VSs.

Main Results:

• Quantitative CT indexes and VSs differed significantly between DILD patients and controls.
• Functioning lung volume strongly correlated with forced vital capacity (r=0.80) and FEV1 (r=0.73).
• CT indexes showed significant correlations with visual scores for disease extent, including honeycombing and reticulation.

Conclusions:

• Quantitative CT indexes correlate well with both visual assessment of DILD extent and PFT results.
• CT quantification offers an objective method for evaluating disease extent and tracking progression or improvement in DILD.