Bronchoscopic fibered confocal fluorescence microscopy image characteristics and pathologic correlations.

Area of Science:

• Pulmonology
• Medical Imaging
• Endoscopy

Background:

• Fibered confocal fluorescence microscopy (FCFM) is an emerging imaging technique for bronchoscopy.
• Assessing FCFM's reliability and diagnostic accuracy is crucial for its clinical adoption.

Purpose of the Study:

• To evaluate the reliability and interpretation of FCFM in bronchoscopy.
• To establish correlations between FCFM images and pathological findings.
• To assess the impact of smoking on FCFM image characteristics.

Main Methods:

• FCFM was performed on 26 patients, with images analyzed by 4 observers for brightness, fiber thickness, and cellularity.
• Interobserver and intraobserver reliability were assessed using intraclass correlation coefficients (ICCs).
• Image characteristics were correlated with smoking status and pathological findings from biopsies in 18 patients.

Main Results:

• High interobserver agreement was found for image brightness (ICC 0.48-0.99) and intraobserver/intrapatient reliability (ICC 0.65-0.91).
• Agreement for fiber thickness was poor in respiratory bronchioles but fair in alveoli.
• FCFM successfully distinguished normal from diseased lung tissue but could not differentiate between specific diseases.

Conclusions:

• FCFM demonstrates excellent image reliability and can identify smoking-induced changes in the respiratory bronchioles.
• Further research is needed to determine FCFM's capability in discriminating among various lung diseases.