Radiation imaging apparatus
First Claim
Patent Images
1. In a computerized tomographic scanner:
- A. a fixed array of cold cathode diodes each said diode being characterized by an impedance in excess of about 100 ohms;
B. a fixed array of radiation detectors juxtaposed to the diode array;
C. means for applying greater than 100 ns duration and less than 200 kv voltage pulses sequentially to the diodes in the array so as to cause said diodes to emit successive substantially constant amplitude X-ray pulses, said radiation being detected by the detectors in the detector array, andD. means responsive to the output signals from said detectors for producing a reconstruction image of a selected body slice illuminated by radiation from the diode array.
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Abstract
Radiation imaging apparatus especially suited for use in a computerized tomographic (CT) scanner employs an array of discrete X-ray sources, each being a cold cathode diode and an adjacent fixed array of closely packed radiation detectors to produce images of rapidly moving body organs such as the beating heart. A variety of alternative X-ray source embodiments are also disclosed.
84 Citations
19 Claims
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1. In a computerized tomographic scanner:
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A. a fixed array of cold cathode diodes each said diode being characterized by an impedance in excess of about 100 ohms; B. a fixed array of radiation detectors juxtaposed to the diode array; C. means for applying greater than 100 ns duration and less than 200 kv voltage pulses sequentially to the diodes in the array so as to cause said diodes to emit successive substantially constant amplitude X-ray pulses, said radiation being detected by the detectors in the detector array, and D. means responsive to the output signals from said detectors for producing a reconstruction image of a selected body slice illuminated by radiation from the diode array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification