Three-dimensional computed tomography bronchoscopy using clinical datasets: a comparison with fibreoptic bronchoscopy

Area of Science:

• Pulmonary medicine
• Radiology
• Medical imaging

Background:

• Airway visualization is crucial for diagnosing and managing respiratory conditions.
• Fibreoptic bronchoscopy (FOB) is the current gold standard for detailed airway inspection.
• Non-invasive imaging techniques are sought to complement or replace invasive procedures.

Purpose of the Study:

• To evaluate three-dimensional computed tomography bronchoscopic (3-DCTB) reconstruction from routine CT scans as a non-invasive airway visualization method.
• To compare the diagnostic capabilities of 3-DCTB with fibreoptic bronchoscopy (FOB).

Main Methods:

• Retrospective analysis of 14 chest CT datasets from 13 patients who underwent both CT and FOB.
• 3-DCTB reconstructions were generated using segmentation and surface rendering algorithms.
• Technical quality and anatomical detail of 3-DCTB images were scored and compared to FOB findings, focusing on the most distal visualized bronchi.

Main Results:

• FOB visualized subsegmental bronchi in the right lower lobe (10/14) and left upper lobe (4/14).
• 3-DCTB failed to visualize subsegmental airways with confidence and never surpassed FOB's visualization depth.
• Proximal and lobar bronchi were visualized by 3-DCTB, but with variable success rates and lower detail compared to FOB for segmental bronchi.

Conclusions:

• 3-DCTB is not a routine substitute for FOB in examining major and segmental bronchi.
• Current 3-DCTB techniques with 6 mm collimation CT data are insufficient for adequate subsegmental airway demonstration.