Hitachi, Ltd.

Yoshitaka Seki

Takashi Nakahara

Takanori Aono

Shinya Yuda

Kouji Akita

Kiyomi Abe

Tetsu Inahara

There is provided an X-ray tube device having a configuration for preventing peeled-off solid lubrication films from scattering in an X-ray tube even when the solid lubrication film peels off a rotary bearing. The X-ray tube device includes: an anode () that is irradiated with an electron beam, thereby emitting X-rays; a rotary bearing () that rotatably supports the anode (); a solid lubrication film which is formed on a front surface of the rotary bearing () and into which a ferromagnet is mixed from the rotary bearing (); and an attractor () which attracts, with a magnetic force, the solid lubrication film that peels off the rotary bearing ().

X-ray tube device and x-ray CT apparatus

A learning unit in learning mode generates a cluster from a cluster analysis of data formed from frequency constituent data and state data, obtained from a sensor unit. An abnormality calculation unit computes, as abnormalities, the minimum values among distances to surfaces of the clusters of the data formed from the frequency constituent data and the state data, obtained when in predictive fault indicator sensing mode. A predictive fault indicator determination unit determines a predictive fault indicator of an X-ray tube by comparing the abnormalities with a predetermined threshold.

X-ray tube predictive fault indicator sensing device, X-ray tube predictive fault indicator sensing method, and X-ray imaging device

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Tokyo, Japan

Yoshitaka Seki