A method for assessing a threat status of a liquid product at a security checkpoint, the liquid product being comprised of a bottle holding a liquid, wherein the bottle is at least partially filled with liquid, the method comprising: a) receiving X-ray image data conveying an image of the bottle holding the liquid, the X-ray image data being derived by performing an X-ray scan of the liquid product at a security checkpoint using an X-ray imaging apparatus; b) processing the X-ray image data to determine the threat status of the liquid product, wherein processing the X-ray image data comprises: i) processing the X-ray image data conveying the image of the bottle holding the liquid to derive geometric information associated with the bottle; ii) processing the X-ray image data to derive location information associated with a meniscus formed by the liquid in the bottle; iii) deriving path length data at least in part based on the location information associated with the meniscus and the geometric information associated with the bottle, the path length data conveying an estimated length of a path followed by X-rays through the liquid held in the bottle; iv) extracting from the X-ray image data X-ray attenuation information; v) determining the threat status of the liquid product at least in part based on the path length data and the X-ray attenuation information; c) releasing information conveying the determined threat status of the liquid product. a) receiving X-ray image data conveying an image of the bottle holding the liquid, the X-ray image data being derived by performing an X-ray scan of the liquid product at a security checkpoint using an X-ray imaging apparatus; b) processing the X-ray image data to determine the threat status of the liquid product, wherein processing the X-ray image data comprises: i) processing the X-ray image data conveying the image of the bottle holding the liquid to derive geometric information associated with the bottle; ii) processing the X-ray image data to derive location information associated with a meniscus formed by the liquid in the bottle; iii) deriving path length data at least in part based on the location information associated with the meniscus and the geometric information associated with the bottle, the path length data conveying an estimated length of a path followed by X-rays through the liquid held in the bottle; iv) extracting from the X-ray image data X-ray attenuation information; v) determining the threat status of the liquid product at least in part based on the path length data and the X-ray attenuation information; i) processing the X-ray image data conveying the image of the bottle holding the liquid to derive geometric information associated with the bottle; ii) processing the X-ray image data to derive location information associated with a meniscus formed by the liquid in the bottle; iii) deriving path length data at least in part based on the location information associated with the meniscus and the geometric information associated with the bottle, the path length data conveying an estimated length of a path followed by X-rays through the liquid held in the bottle; iv) extracting from the X-ray image data X-ray attenuation information; v) determining the threat status of the liquid product at least in part based on the path length data and the X-ray attenuation information; c) releasing information conveying the determined threat status of the liquid product.