Diagnostic Techniques for Peripheral Pulmonary Lesions

Peripheral pulmonary lesions present a diagnostic challenge owing to their small size, deep location and proximity to vital structures. Conventional modalities such as computed tomography-guided percutaneous needle biopsy offer high accuracy but carry risks of pneumothorax and haemorrhage. Flexible bronchoscopy has traditionally been limited by reach and visibility beyond the segmental bronchi. Recent advances marry image guidance with endoscopic platforms to improve access, safety and specimen quality. Endobronchial ultrasound (EBUS) using radial probes with guide sheaths enables real-time lesion localisation. Electromagnetic navigation bronchoscopy (ENB) superimposes pre-procedural CT data on the bronchoscopic pathway to steer instruments toward peripheral targets. Shape-sensing and AI-driven robotics further refine catheter stability and directional control, facilitating sampling in fifth-generation or more distal airways. Techniques such as cryobiopsy introduce 360° tissue acquisition, enhancing yields for extraluminal nodules and molecular analysis. Concurrent development of intraprocedural imaging modalities—such as real-time confocal laser endomicroscopy—offers microscopic visualisation at the needle tip, potentially reducing non-diagnostic sampling. Together, these innovations address global disparities by enabling less experienced operators to achieve diagnostic performance rivalling expert teams, whilst minimising complications and expediting personalised treatment planning.

Research from Nature Portfolio

Recent studies have introduced an AI-assisted robotic bronchoscopy platform that integrates a user-friendly catheter with a shared-control algorithm. By learning from expert bronchoscopic video data, the system guides novice operators to target peripheral bronchi beyond the fifth generation, maintaining safety and steering precision both in vitro and in vivo. Early results demonstrate that non-expert clinicians can achieve diagnostic manoeuvres and sampling accuracy comparable to experienced practitioners. This approach promises to mitigate skill-related disparities and expand access to advanced diagnostic bronchoscopy across diverse healthcare settings.

Diagnostic Techniques for Peripheral Pulmonary Lesions publication trend

The graph below shows the total number of articles in diagnostic techniques for peripheral pulmonary lesions across all publications each year (not limited to Nature Index journals).

Technical terms

Bronchoscopy: Endoscopic examination of the airways using a flexible tube to visualise and access pulmonary structures.

Endobronchial ultrasound (EBUS): Ultrasound probe inserted via bronchoscope to generate real-time images of airway walls and adjacent lesions.

Electromagnetic navigation bronchoscopy (ENB): Technique that overlays pre-acquired CT data with bronchoscopic imaging to guide instruments toward peripheral nodules.

Cryobiopsy: Tissue sampling method using a cryogenic probe to freeze and retrieve larger cylindrical specimens.

Needle-based confocal laser endomicroscopy (nCLE): Microscopic imaging technique delivered through a needle probe to provide real-time cellular images at the sampling site.

References

1. AI co-pilot bronchoscope robot. Nature Communications (2024).
2. Novel Robotic-Assisted Cryobiopsy for Peripheral Pulmonary Lesions. Lung (2022).
3. Diagnostic yield and safety of navigation bronchoscopy: A systematic review and meta-analysis. Lung Cancer (2023).
4. Bronchoscopic needle-based confocal laser endomicroscopy (nCLE) as a real-time detection tool for peripheral lung cancer. Thorax (2021).