Sago Systems’ patented lightweight aPat™ handheld instant passive millimeter –wave images of weapons, improvised explosive, liquids in containers and suspicious objects. The aPat™ is technician friendly with easily identifiable images located within the window of the handheld unit. The aPat™ is radiation-free providing a safe environment for both the person being checked and the security officer. The aPat™ allows security personnel to image areas that are difficult to reach without patting down passengers or customers. The aPat™ provides immediate answers. Furthermore, the aPat™ reduces one of the costliest aspects of checkpoint screening – the physical pat down.