na-adjective
non-invasive
Medical and technical term for procedures or tests that do not break the skin or enter the body.
この検査は非侵襲的で、患者への負担が少ない。
This test is non-invasive and places little burden on the patient.
侵襲的 means 'invasive' and is the direct antonym. 非侵襲的 is formed by adding the prefix 非 (non-).
Compound of 非 (non-) + 侵襲 (invasion) + 的 (-ive). A modern technical term, likely calqued from English 'non-invasive'.