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Theoretical calculations and simulation results for the noise of a hybrid active pixel sensor designed for real-time digital fluoroscopy are presented. Noise performance is given as a function of transistor dimensions, allowing the designer to choose appropriate device dimensions when designing flat-panel imaging circuits. Optimal device dimensions are derived for minimising the input referred noise of the active pixel to meet the stringent requirements for low-noise digital X-ray fluoroscopy (<1000 noise electrons).
Inspec keywords: radiography; circuit noise; image sensors
Other keywords:
Subjects: X-ray, gamma-ray instruments and techniques; X-ray and gamma-ray equipment; Image sensors; Image detectors, convertors, and intensifiers