X-ray tube adjustment apparatus, x-ray tube adjustment...

X-ray or gamma ray systems or devices – Source – Electron tube

Reexamination Certificate

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C378S207000

Reexamination Certificate

active

10510213

ABSTRACT:
An initial image (the image of a slit plate5imaged when adjusted to an optimal focal diameter) is stored in a storage section72of an X-ray tube adjusting apparatus7. An acquisition section74acquires a test image (the image of the slit plate5imaged at the time of adjusting the focal diameter). A presentation section76presents the initial image and an image representing the luminance on the initial image (showing a contrast Δa between a slit portion764aand a residual area portion766ain the initial image) and the test image and an image representing the luminance on the test image (showing a contrast Δb between a slit portion764band a residual area portion766bin the initial image) simultaneously (in a comparable manner).

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Rao et al., The Modulation Transfer Functions of the X-ray Focal Spots, 1968, Phys. Med. Biol., vol. 14, No. 14, pp. 93-106.
NEMA, “Measurement of Dimensions and Properties of Focal Spots of Diagnostic X-Ray Tubes”, Standards Publication No. XR 5-1992 (R1999), National Electrical Manufacturers Association, copyright.1999, entire document.
Susumu Kogashiwa, et al., “O.F.F. gata Han'ei Sokuteiki no Seisaku”.Bulletin of Tokyo Metropolitan College of Allied Medical Sciences, Mar. 10, 1995, No. 8, pp. 97-102.

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