To evaluate the correlation between pre-surgical 4DCT-ventilation imaging and post-surgical lung function.

To evaluate the correlation between pre-surgical 4-Dimensional Computed Tomography-ventilation (4DCT-ventilation) imaging and post-surgical lung function. To determine whether 4DCT-ventilation is a better predictor of post-surgical lung function than nuclear medicine imaging using pulmonary function tests (PFTs). To determine whether 4DCT-ventilation is a better predictor of post-surgical lung function than nuclear medicine imaging using quality of life (QOL) questionnaires. Evaluate cost-effectiveness of using 4DCT-ventialtion and VQ scans for pre-surgical assessment. To use longitudinal (pre and post-surgical) 4DCT-ventilation imaging to derive novel post-surgical prediction formulas.

Inclusion Criteria:

1. Provision to sign and date the consent form.
2. Stated willingness to comply with all required (non-optional) study procedures and be available for the duration of the study.
3. Be a male or female aged 18 to 100.
4. Patient with lung cancer (presumed or biopsy proven) currently undergoing or having undergone evaluation for resection.
5. Lung function assessment required for pre-surgical evaluation at the discretion of the cardiothoracic surgeon.
6. Life expectancy greater than 3 months.

Exclusion Criteria:

1. Patients getting a planned wedge resection as the only thoracic resectional procedure.