Inclusion Criteria:  Patients must have previous CT images demonstrating a lung mass or masses amenable to lung resection (open or minimally invasive) Patient is scheduled for surgical resection in a room equipped with intraoperative CT Patient must sign informed consent, with risks and benefits of CT imaging explained Patients with lung tumors >= 1cm to =< 3 cm based on preoperative CT scan. (Patients with lung tumors from < 1 cm or > 3 cm will be reviewed and approved for inclusion on an individual assessment by clinical collaborators)  Exclusion Criteria:  Pediatric patients less than 18 years of age Patients who have undergone previous ipsilateral thoracic surgery, sclerotherapy, or radiation therapy as intraoperative adhesions may limit lung collapse intraoperatively Patients who received neoadjuvant immunotherapy Women who are pregnant or nursing