Calculations concerning voltage ripple of X-ray generators

Porubszky, T

doi:10.1088/0031-9155/31/4/003

Cited by 7 publications

(1 citation statement)

References 7 publications

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“…dual energy), the influence of the wave form of the X-ray tube voltage and of the target angle on the X-ray spectrum are of great importance as well. The waveform depends especially on the type of X-ray generator used (Dendy and Heaton 1999, p. 26;Porubszky 1986). Figure 3.5 shows two typical X-ray spectra.…”

Section: Productionmentioning

confidence: 99%

Production and Measurement of X-Rays

Aichinger¹,

Dierker²,

Joite-Barfuß³

et al. 2011

Radiation Exposure and Image Quality in X-Ray Diagnostic Radiology

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Section: Productionmentioning

confidence: 99%

Production and Measurement of X-Rays

Aichinger¹,

Dierker²,

Joite-Barfuß³

et al. 2011

Radiation Exposure and Image Quality in X-Ray Diagnostic Radiology

View full text Add to dashboard Cite

Production and Measurement of X-rays

Aichinger¹,

Dierker²,

Joite-Barfuß³

et al. 2004

Radiation Exposure and Image Quality in X-Ray Diagnostic Radiology

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Experimental verification of reverse order of diagnostic X-ray beam quality in voltage-ripple dependence

Matsumoto

Kubota

Ozaki

et al. 1995

Med. Biol. Eng. Comput.

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It has been generally expected that, as X-ray tube-voltage ripple increases, the X-ray spectrum shifts to the low photon-energy side, and therefore the mean energy decreases, i.e. the beam quality is softened. This is the normal order. Previous calculation (Birch et al., 1979), however, showed that the beam quality generated by 100% ripple was harder than that by 50% ripple. This is the reverse order, against general expectation. To verify the reverse order, X-ray spectra are measured using a germanium detector system. The measurements are performed with various thicknesses of aluminium object. To obtain large ripples at small tube currents, small-capacity high-voltage cables are made. To perform efficient measurements, the homogeneous sensitive region of the germanium crystal is determined, and detector-collimators with various diameters are prepared. As a result, experimental verification of the reverse order is performed for various thicknesses of object. The reverse order also appears in photon spectra and mean energies calculated using three models from previous work (Kramer, 1923; Birch and Marshall, 1979; Tucker et al., 1991) by inserting the tube-voltage waveforms measured with the authors' system. The experimental results agree well with the results using the Birch-Marshall model. Mean energies reach the minimum levels for the three models at 20-60% ripple, as do the experimental results. The reason for the phenomenon is clarified by qualitative illustration.

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Calculations concerning voltage ripple of X-ray generators

Cited by 7 publications

References 7 publications

Production and Measurement of X-Rays

Production and Measurement of X-Rays

Production and Measurement of X-rays

Experimental verification of reverse order of diagnostic X-ray beam quality in voltage-ripple dependence

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