Collection of Anatomical and Reference Data for Development of a Novel Non-Invasive Lung Hydration Status Technology

Inclusion Criteria:

• Subjects > 30 years of age
• Subjects who are ambulatory not requiring assistance for ambulation
• Subjects who have been informed of the nature of the study and agree to its provisions and have provided written informed consent as approved by the IRB

Exclusion Criteria:

• Subjects with an active implantable medical device not cleared for use with the IMED-4 in the IMED- 4 Investigators Brochure.
• Subjects who are pregnant or lactating or who have been pregnant within the past three months
• Subjects who have a measured temperature of >38° C at the time of screening
• Subjects who have tattoos and/or non-intact skin on the back in the electrode patch placement region
• Subjects who have had a past serious allergic reaction to adhesives
• Patients who decline to have their backs photographed with the IMED-4 device in position
• Subjects who have poor general physical/mental health that, in the opinion of the investigator, will not allow the subject to be a good study candidate (i.e. other disease processes, mental capacity, substance abuse, incarceration, shortened life expectance, etc.)