Robotic Bronchoscopy for Small Lung Nodules Without a Bronchus Sign

The goal of this observational study is to learn about the diagnostic performance and safety of robotic-assisted bronchoscopy using the Ion Endoluminal System in adults with small lung nodules that do not show a bronchus sign on CT imaging. The main questions it aims to answer are: * How effective is robotic-assisted bronchoscopy in obtaining a diagnosis for small lung nodules without a bronchus sign? * How safe is the procedure, including the risk of complications such as pneumothorax and bleeding? Participants who are already scheduled to undergo lung nodule biopsy using the Ion Endoluminal System and integrated mobile cone-beam CT (mCBCT) as part of their routine clinical care will be enrolled in this study.