A method and system for detecting an image of an object, particularly a soft tissue material. Such negative active material may improve the electrical conductivity of the silicon-based nanowires, and suppress separation of the silicon-based nanowires caused from volume expansion, and thus may improve lifetime characteristics of a lithium battery. The information may comprise an indication of distance from the plane andor a three-dimensional coordinate for the point. When a leading end of the roof assembly is struck by a vehicle, the coupler is rotated and the pivot post engages the slots so that the coupler translates upward.