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.