Scanner data multiplexer for interfacing a radiation detector array and a computer

Claim 1

A device in combination with an array of a plurality of opposed pairs of radiation detectors, each of said detectors scanning across at least one half of a scan field in travelling along a sequence of resolution elements in a scan line, with the opposed detectors of each pair travelling in opposite directions across said scan field, said detectors, in a rotational sequence, providing scintillation count data through at least one pulse discriminating channel to an accumulator which, on a command from a general purpose computer under program control provides serial data words representative of data sequentially obtained from opposing detectors, said computer including a memory comprising a random access memory, and a buffer storage means having address locations, for each channel of said detectors, equal to the total number of resolution elements in a scan line, said device comprising input data register means for receiving said serial data words, base address register means for receiving from said computer a base address location corresponding to a location in the memory of said computer, means for transmitting appropriate commands from said computer to said accumulator and for transmitting said serial data words to said input data register, relative address means, including detector counter means, resolution element counter means, complement control means and adder means, said counter means, said complement control means and said adder means being interconnected for calculating a buffer memory relative address location for each said serial data word; absolute address register means for providing an absolute address by combining a base address from said base address register means and a relative address from said relative address means, and means for transferring said absolute address to said computer memory, said computer memory including means responsive to said absolute address for loading said buffer storage means for a channel of a given detector in a direction opposite to the buffer storage means for a channel of an opposed detector.

Claim 2

A device in combination with an array of a plurality of opposed pairs of radiation detectors, each of said detectors scanning across at least one half of a scan field in travelling along a sequence of resolution elements in a scan line, with the opposed detectors of each pair travelling in opposite directions across said scan field, said detectors, in a rotational sequence, providing scintillation count data through at least one pulse discriminating channel to an accumulator which, on a command from a general purpose computer under program control provides serial data words representative of data sequentially obtained from opposing detectors, said computer including a memory comprising a random access memory, and a buffer storage means having address locations, for each channel of said detectors, equal to the total number of resolution elements in a scan line, said device comprising input data register means for receiving said serial data words, base address register means for receiving from said computer a base address location corresponding to a location in the memory of said computer, means for transmitting appropriate commands from said computer to said accumulator and for transmitting said serial data words to said input data register, relative address means, including detector counter means, resolution element counter means, complement control means and adder means, said counter means, said complement control means and said adder means being interconnected for calculating a buffer memory relative address location for each said serial data word; absolute address register means for providing an absolute address by combining a base address from said base address register means and a relative address from said relative address means, and means for transferring said absolute address to said computer memory, said computer memory including means responsive to said absolute address for loading said buffer storage means for a channel of a given detector in a direction opposite to the buffer storage means for a channel of an opposed detector.