A computer implemented method for facilitating visual identification of prohibited objects in images, said method comprising: - providing a plurality of records associated with receptacles previously screened at a security checkpoint, the records in the plurality of records including data conveying: i. an image of the contents of a receptacle derived from an apparatus that scans the receptacle with penetrating radiation; ii. a level of risk data element conveying a perceived threat level associated to the receptacle; - processing records in said plurality of records to display on a display device a first viewing space conveying a sequence of thumbnail images, the sequence of thumbnail images being associated with receptacles screened over a time period from the receptacles previously screened at the security checkpoint, wherein each thumbnail image conveys information derived from an associated level of risk data element; - receiving information provided by a user through an input, the information provided being for selecting a receptacle amongst the receptacles screened at the security checkpoint over the time period by selecting a thumbnail image in the sequence of thumbnail images conveyed in the first viewing space; and - processing the information provided by the user for causing the second viewing space to convey an enhanced image of the selected receptacle, wherein the enhanced image is derived by processing data in a record in the plurality of records associated with the selected thumbnail image and information received from an automated threat detection processor indicating an area of interest in the image potentially containing a prohibited object, wherein the enhanced image conveys the area of interest in a visually contrasting manner relative to portions of the image outside the area of interest, wherein said second viewing space is displayed concurrently with the first viewing space so that the enhanced image of the selected receptacle is displayed concurrently with the sequence of thumbnail images associated with receptacles screened over the time period at the security checkpoint. - providing a plurality of records associated with receptacles previously screened at a security checkpoint, the records in the plurality of records including data conveying: i. an image of the contents of a receptacle derived from an apparatus that scans the receptacle with penetrating radiation; ii. a level of risk data element conveying a perceived threat level associated to the receptacle; i. an image of the contents of a receptacle derived from an apparatus that scans the receptacle with penetrating radiation; ii. a level of risk data element conveying a perceived threat level associated to the receptacle; - processing records in said plurality of records to display on a display device a first viewing space conveying a sequence of thumbnail images, the sequence of thumbnail images being associated with receptacles screened over a time period from the receptacles previously screened at the security checkpoint, wherein each thumbnail image conveys information derived from an associated level of risk data element; - receiving information provided by a user through an input, the information provided being for selecting a receptacle amongst the receptacles screened at the security checkpoint over the time period by selecting a thumbnail image in the sequence of thumbnail images conveyed in the first viewing space; and - processing the information provided by the user for causing the second viewing space to convey an enhanced image of the selected receptacle, wherein the enhanced image is derived by processing data in a record in the plurality of records associated with the selected thumbnail image and information received from an automated threat detection processor indicating an area of interest in the image potentially containing a prohibited object, wherein the enhanced image conveys the area of interest in a visually contrasting manner relative to portions of the image outside the area of interest,