The present invention is directed to a system and method for serving questionnaire content within a banner ad, the system including a web server, a web browser that requests and receives a web page including the banner ad from the web server and a questionnaire server for serving the questionnaire content. A CT apparatus may be used having a source, a detector transversely displaced from a center of a field of view during acquisition of the projection data, and a filter. The predefined information data is displayed in accordance with the speech information that is given by the user and recognized by a speech recognition component and in accordance with the recorded visual field. Since the magnetic shield layers are formed from materials having high permeability and high resistivity, even if friction causes dragging of the head surface, there is effectively no short circuit between the magnetic shield layer and the magnetic element. The first change may be, for example, connection or disconnection of a USB device. Each of the stackable electronic modules includes a housing including first and second stacking portions mechanically complementary to each other.