Evaluate the Utility of the ProLung Test as Adjunctive to CT Scan in the Diagnosis of Lung Cancer

Inclusion Criteria: * Subject is male or female, age 18 or above. * If female, subject * is of non-childbearing potential meaning permanently sterile, or * is one year post-menopausal; or * is not pregnant as confirmed by negative urine pregnancy test and using adequate birth control at time of screening. * Subject presents with one or more of the following clinical symptoms or suspicious radiological finding(s): * Persistent cough * Hoarseness * Shortness of breath * Sputum streaked with blood * Fatigue * Unexplained recent weight loss * Recurrent pneumonia or bronchitis * Chest pain * Abnormal chest radiograph * Subject has undergone a CT scan of the lungs within 44 days of measurement that indicates one or more non-calcified nodules (NCN) or lung masses suspicious for lung cancer. * Subject is capable of understanding and agreeing to fulfill the requirements of this protocol. * Subject has signed the IRB/IEC approved informed consent form. Exclusion Criteria: • Subjects who meet one or more of the following criteria may not be enrolled in this Study: * Subject has a pacemaker or other implanted electronic device. * Subject with diagnosed malignancy within the past 5 (five) years except for non-melanoma skin cancer. * Subject with significant systemic diseases including uncontrolled diabetes, severe heart failure, uncontrolled hypertension, myocardial infarction and/or auto-immune conditions within the prior 3 (three) months. * Subject taking systemic corticosteroid medication (except for inhaled) within 14 days prior to measurement session. * Subject has had an invasive medical procedure that involves the thoracic cavity within 30 days prior to the measurement session. * Subject who currently abuses alcohol or drugs. * Subject presents with an anomalous physical or anatomical condition that precludes measurement. * Subject will have undergone unusually strenuous exercise within 24 hours prior to measurement session. * Subject who has, in the Principal Investigator's opinion, any medical condition or other circumstance that would prevent completion of this Study or interfere with analysis of the Study results. * Subjects who have undergone radiation and chemotherapy treatment within the past 30 days. * Subject receiving therapy for documented or suspected chest infection. * Pregnant or lactating females.