An electromagnetic interference andor electromagnetic radiation shield is formed by forming a conductive layer over an encapsulant. The output of a computer aided detection system is presented to the reader of a screening case in two phases: an interactive phase, and a prompting phase. After the beam width of the plane H is set to the target value, the aperture width of the Fermi antenna is changed so as to set the beam width of the plane E to a beam width having a target directivity. The connector housing has conductive surfaces and a plurality of ground terminal members are disposed along the transverse walls or the longitudinal walls, or both, for connecting to ground circuits in the circuit board. The pause durations andor the transmitting durations in the time curve are analyzed and the origin transmitting units of the signal are ascertained on the basis of these items of information. The bent parts are straightened out when twisting occurs.