Section 892.1910 - Radiographic grid(a)Identification. A radiographic grid is a device that consists of alternating radiolucent and radiopaque strips intended to be placed between the patient and the image receptor to reduce the amount of scattered radiation reaching the image receptor.(b)Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 892.9 .53 FR 1567, Jan. 20, 1988, as amended at 65 FR 2323 , Jan. 14, 2000