Patent ID: 11940395
Assignee: VIDERAY TECHNOLOGIES, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A method of attenuating x-ray energy generated during an operation of a backscatter imaging system configured to generate a collimated beam of x-ray energy, the method comprising:
providing a chopper wheel including an inner rim and an outer rim, the chopper wheel configured to rotate in a plane to periodically interrupt the collimated beam of x-ray energy directed substantially perpendicular to the plane, an interruption generating scattered x-ray energy in directions including a direction substantially parallel to the plane of the chopper wheel;
enclosing the chopper wheel in a housing with a gap between the chopper wheel and an interior surface of the housing, the gap substantially parallel to the plane of the chopper wheel;
including a first projection at the outer rim of the chopper wheel, the first projection extending into the gap in a direction perpendicular to the plane; and
including a second projection at the inner rim of the chopper wheel, the second projection extending into the gap in the direction perpendicular to the plane.