High frequency x-ray generator basics

Abstract

The purpose of this paper is to present basic functional principles of high frequency x-ray generators. The emphasis is put on physical concepts that determine the engineering solutions to the problem of efficient generation and control of high voltage power required to drive the x-ray tube. The physics of magnetically coupled circuits is discussed first, as a background for the discussion of engineering issues related to high-frequency power transformer design. Attention is paid to physical processes that influence such factors as size, efficiency, and reliability of a high voltage power transformer. The basic electrical circuit of a high frequency generator is analyzed next, with focus on functional principles. This section investigates the role and function of basic components, such as power supply, inverter, and voltage doubler. Essential electronic circuits of generator control are then examined, including regulation of voltage, current and timing of electrical power delivery to the x-ray tube. Finally, issues related to efficient feedback control, including basic design of the AEC circuitry are reviewed.

A new real time filter for local exposure correction in panoramic radiographs

“…This deeply changes the radiation spectrum. 22 However, experimental results reported here demonstrate that a monochromatic approximation is valid also in this case.…”

FFT analysis of the X-ray tube voltage waveforms of high-frequency generators for radiographic systems

“…Nowadays, high-frequency X-ray generators are becoming the universal choice for radiographic systems (9,10). They are compact and the output is stable.…”

“…High-frequency X-ray generators for radiographic systems have been available for the past 15-20 years, during which time they have improved significantly. Nowadays, high-frequency X-ray generators are becoming the universal choice for radiographic systems (9,10). They are compact and the output is stable.…”

“…They are compact and the output is stable. A high-frequency generator produces X-ray tube voltage waveforms at much higher frequencies than those of single-phase, threephase, or constant potential generators (9,10).…”

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