An embodiment common mode noise reduction apparatus comprises a common mode choke, a balance inductor, a first capacitor and a second capacitor. The acoustic backing material may contain additional features, such as tabs or notches, for use in positioning the transducer on fixtures during manufacturing or positioning the transducer within a housing during final assembly. Bragg-type multilayer interference filters can be formed for the image sensor using dielectric layers with alternating high and low indices of refraction. A cannulated lag screw lock is positioned in the intramedullary shaft and engages the lag screw. \u201cContent\u201d may include the written text of the email, graphic image attachments, electronic documents, and other file types.