Solid-state image sensors, specifically the image sensor pixels, which have three or four transistors, high sensitivity, low noise, and low dark current, are provided. Observing registration messages exchanged between the visiting network and the home network, the disclosed invention detects if the visiting network has deployed an anti-traffic-redirection mechanism as aimed at fooling the home network into permitting connection with a non-preferred network. The CMOS output stage also includes a plurality of slots provided through the one well into the substrate. By optimizing the uninstallation and installation procedure, the estimated construction time is reduced to the maximum extent. Each electronic cassette may be connected to one power supply through a power cable separately from the communication cable. During operation, the system collects target electromagnetic interference signals using one or more antennas positioned in the vicinity of the target area.