Respiratory imaging technology firm 4DMedical (ASX:4DX) has initiated a commercial pilot with the Military Health System within the US Department of Defense.

The company says the arrangement involves carrying out a fixed number of scans for pulmonary diagnostic tests on full commercial terms.

It also says the pilot aims to validate the utility of the company's trademarked XV Technology in providing respiratory health insights for lung diseases.

Shares of 4DMedical are up 25% the past five days.