A quantum dot sensitized wide bandgap semiconductor heterojunction photovoltaic device comprises an electron conductive layer; an active photovoltaic layer adjacent the electron conductive layer; a hole conductive layer adjacent the active PV layer; and an electrode layer adjacent the hole conductive layer. Substantially, the entire medium is scanned by X-ray beams, and the X-rays passing through the medium are detected for a plurality of areas of the medium. The body portions are in pivoting engagement and fixed in a connector body retainer which also enables their pivoting, hinged movement.