Abstract: A new and improved intraoral sensor for use in a filmless radiography system is disclosed. The sensor is configured to fit comfortably and close to a target area in an intraoral cavity. By providing a comfortable relative fit to the target area, the sensor is ergonomically improved, in terms of its comfort and feel to a dental patient. In addition, the configuration of the sensor is designed to allow the sensor to be placed closer to a target area in an oral cavity than prior sensors (i.e. closer to target teeth, gum, etc). Moreover, the sensor is configured so that it can easily be located in a correct position relative to the target area, and when located correctly to properly position its sensing structure for receiving radiant energy. These features are believed to reduce refractive error in the image received by the sensor, thereby improving the image data transmitted by the sensor.