Structural and functional alterations of subjects with cement dust exposure: A longitudinal quantitative computed...

Area of Science:

• Pulmonary Medicine
• Radiology
• Occupational Health

Background:

• Cement dust exposure (CDE) is a risk factor for pulmonary disease.
• CDE can lead to structural changes in airways and lung parenchyma.
• Longitudinal studies are needed to understand CDE's long-term effects on lung health.

Purpose of the Study:

• To investigate longitudinal, quantitative computed tomography (CT)-based metric alterations due to CDE.
• To assess the sensitivity of CT metrics for early CDE detection.
• To compare CT findings in CDE with clinical lung function changes.

Main Methods:

• Acquired baseline and 3-year follow-up CT scans from CDE subjects.
• Extracted airway structural metrics (wall thickness, bifurcation angle) and lung functional metrics (volumes, emphysema percentage).
• Correlated CT metrics with clinical pulmonary function tests.

Main Results:

• Pulmonary function tests showed minimal or improved results after 3 years.
• Significant longitudinal alterations observed in CT metrics, including changes in bifurcation angle, increased wall thickness, reduced air and tissue volumes, smaller global lung shape, and increased emphysema percentage.
• CT-based metrics were more sensitive than clinical measures for detecting CDE-related lung changes.

Conclusions:

• Quantitative CT metrics reveal significant early structural and functional lung alterations in CDE subjects.
• CT-based assessments are more sensitive for early CDE identification than standard pulmonary function tests.
• Observed long-term CT changes in CDE subjects appear distinct from smoking-induced lung damage.