Among other things, an energy shield (212) for a radiation system, such as a security imaging system, is provided. The energy shield is comprised of one or more flaps (300). At least one flap defines an aperture (320) providing a demarcation between a first flap segment (322) of the flap and a second flap segment (324) of the flap. The aperture (e.g., and a flexible member (326) positioned spatially proximate the aperture) provide for (e.g., facilitate) movement of the second flap segment relative to the first flap segment. In this manner, an amount of force required to be applied by an object to pass by the flap may be reduced when the object is small and merely contacts the second flap segment, for example. In this manner, baggage jams may be mitigated, for example, by reducing the likelihood that certain objects will be impeded from passing through the energy shield.