The invention relates to a detector arrangement for a tomographic imaging apparatus, particularly for a positron emission tomograph. A structure having at least one exposed conductive structure is provided. In a write mode, a plurality of read data stored in the readwrite data register array unit or input data applied from a timing data buffer unit are stored in a cell, array block through the common data bus unit. In one aspect, forcing the data link down causes all subsequent inbound packets to be dropped and all pending outbound requests and completions to be aborted during the error recovery mode. A second ion implantation process, utilizing dopants with the second conductive type, is performed to form a second doped region in the surface of the photo sensor.