21 CFR 315.4 - Indications.
(a) For diagnostic radiopharmaceuticals, the categories of proposed indications for use include, but are not limited to, the following:
(1) Structure delineation;
(2) Functional, physiological, or biochemical assessment;
(3) Disease or pathology detection or assessment; and
(4) Diagnostic or therapeutic patient management.
(b) Where a diagnostic radiopharmaceutical is not intended to provide disease-specific information, the proposed indications for use may refer to a biochemical, physiological, anatomical, or pathological process or to more than one disease or condition.