Yes, it’s safe.
Manufacturers are required to certify that their products meet the Federal radiation safety performance standard for cabinet x-ray systems.
Radiation Emission limit from FDA: “Radiation emitted from the cabinet x-ray system shall not exceed an exposure of 0.5 milliroentgen in one hour at any point five centimeters outside the external surface.”–CFR – Code of Federal Regulations Title 21, Part 1020.40, (c) Requirements.
SeamarkZM X-ray inspection system emission usually under 0.3 μSv/hr, it’s less than the normal background radiation level. (Note: Normal background radiation is approximately 0.02 mR/hr at sea level and approximately 0.5 mR/hr in a plane at cruising altitude during the day.)
The limit on radiation emission established by the performance standard is sufficiently restrictive that there is no additional hazard for specific populations such as children or pregnant women.