Distribution of Regional Lung Function by Vibration Response Imaging

Inclusion Criteria:

• Patient is able to read and understand the Informed Consent Form and he/she will provide written Informed Consent.
• Male or female in the age range of 18-85 years.
• The patient will undergo V/Q scan (up to ONE WEEK from the VRI recording)
• The patient presented for evaluation of COPD.
• Body Mass Index >21.

Exclusion Criteria:

• Unstable clinical status such as fever, acute shortness of breath, cough, hemoptysis, cheat pain, or acute chest illness.
• Chest wall deformation;
• Spine deformation (including severe scoliosis);
• Hirsutism;
• Potentially contagious skin lesion on the back;
• Skin lesion that would interfere with sensor placement;

• Any additional chronic lung disease of any findings such as past tuberculosis, visualized on CXR.

  8. Previous resection lung surgery and history of lung tumor; 9. Cardiac pacemaker or implantable defibrillator