A method and system for route selection and a method for route reconstruction. Specifically, it relates to aerosols containing opioids that are used in inhalation therapy. Each lens is located closer to the end of its associated optical fiber, which is disposed coaxially to the optical axis of the lens, than the natural focal plane of the lens, thereby blurring the light received from the object. Single print station and multiple print station embodiments are disclosed. If the counted value exceeds the preset value, the control device generates a paper-delivering instruction to the printed device. The process is suitable for use on an industrial scale.