non-invasive

adjective Medicine/Medical.

1. not invading adjacent healthy cells, blood vessels, or tissues; localized: a noninvasive tumor.
2. not entering or penetrating the body or disturbing body tissue, especially in a diagnostic procedure.

adjective

1. (of medical treatment) not involving the making of a relatively large incision in the body or the insertion of instruments, etc, into the patient

adj.also noninvasive, by 1850, from non- + invasive. adj.

1. Not penetrating the body, as by incision. Used especially of a diagnostic procedure.
2. Not invading healthy tissue.