Inclusion Criteria:

1. Able and willing to read, understand, and provide written Informed Consent;

2. Age range of 18-90 years;

3. Potential candidate for at least lobectomy due to lung cancer or other intrathoracic
malignancy (either suspected or proven by biopsy). Both open and minimally invasive
(thoracoscopic) resections are acceptable.

4. BMI > 19.

Exclusion Criteria:

1. Body habitus or skin condition that might prevent the placement of the sound sensors
on the back (e.g. severe scoliosis, kyphosis, chest wall deformation, skin lesion on
the back or compression fracture);

2. There should be no active pulmonary infection (e.g. pneumonia) at the time of the
recordings;

3. Hirsutism unless patient is willing to have back shaved;

4. Potentially contagious skin lesion on the back;

5. Giant bulla (more than 1/3 of the hemithorax or >10cm)

6. Pregnant women