A method and system include at least one X-ray source for producing at least one X-ray beam, at least one detector assembly, at least one shutter, and a barcode reader. The shutter directs the at least one X-ray beam toward the detector assembly. The barcode reader is affixed, in a predetermined proximity, to the shutter for detecting a barcode on an object that is moved along the shutter thereby causing the shutter to be opened from a closed state and/or fully closed once the barcode has been detected.