Imaging device

摘要

An imaging device (6) for scan-imaging radiation includes an imaging cell array (3) comprising an array of detector cells generating charge in response to incident radiation (1) and an array of pixel circuits each pixel circuit associated with a respective detector cell. The pixel circuit includes circuitry for accumulating plural radiation hit on an associated detector cell and transfer circuitry shifting upon command the accumulated value of all pixels by one step in one dimension (e.g., row by row). The imaged object (2) moves at a speed VOPT (7) with respect to the radiation source and the imaging detector (or source and detector move at −VOPT with respect to the object) on which the accumulated values are shifted are with VTDI (8). VTDI may equal VOPT in value and direction. Thus, a value is accumulated in a moving information package using multiple pixels (10) and referring directly to a location on the moving object. The accumulated values are read out along one edge of the pixel array. An image is reconstructed in (4) and displayed in (5).

主权项

1. A non-CCD imaging device for scan-imaging high energy radiation in a Time Delay Integration (TDI) mode, comprising:
an image cell array including:
an array of detector cells each comprising a direct-conversion material for directly converting incident radiation into charge; anda corresponding array of pixel circuits each comprising accumulation circuitry for accumulating charge corresponding to incident radiation on a respective detector cell of the array of detector cells,wherein the accumulation circuitry of a first one of the pixel circuits comprises:
a first charge store, electrically coupled to a first detector cell of the array of detector cells; anda second, different, charge store, wherein the non-CCD imaging device is operable in first and second configurations, and the first detector cell is arranged to generate charge in response to incident radiation during both of the first and second configurations, wherein, in the first configuration:
the first charge store is configured to accumulate the charge generated by the first detector cell; andcharge is received at the first charge store from a preceding pixel circuit and combined with the charge generated by the first detector cell during the first configuration, and, in the second configuration:
charge combined at the first charge store during the first configuration plus charge generated by the first detector cell during the second configuration is transferred to the second charge store.