| abstract |
A device, system, and method for measuring a dose remaining in a drug delivery device used to deliver the dose to a patient. A dosage measurement system for measuring a volume of a liquid in a container includes a plurality of light sources arranged and configured to emit electromagnetic radiation toward the container. A plurality of sensors optically coupleable to the plurality of light sources and arranged and configured to detect electromagnetic radiation emitted by at least a portion of the plurality of light sources are located within the device. The apparatus also includes a processing unit configured to receive, from each of the plurality of sensors, data representing a portion of the detected electromagnetic radiation. The processing unit is further operable to convert the received data into an identification code representing the electromagnetic radiation detected by the plurality of sensors. [Selection diagram] FIG. |