A sheet feeder for a print engine includes a paper tray which holds a stack of sheets including a top sheet, and a pick-roller which makes contact with the top sheet. The present invention can minimize a moir\xe9 phenomenon and a diffraction phenomenon by external light by performing line breakage of a regular or irregular conductive pattern by using the irregular pattern. A removable bin assembly with a front cover normally seals the ice making compartment to maintain the temperature in the compartment. A second gate runner is connected to the first gate runner to make contact to a gate metal. Optionally, the systems and techniques may provide suppression of unwanted signals, enhanced contrast, and artifact control in imaging samples with small values of T2.