X-ray computer tomography apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsToyoshige Harada, Sanae Harada
Life of this patent
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Abstract
An X-ray computer tomography apparatus comprises a high-voltage transformer which performs the increase and noncontacting transmission of the power simultaneously and outputs a desired high voltage for causing X rays to be generated at the rotatable gantry section. The high-voltage transformer is divided into a primary-side which is provided on the static gantry section and to which the output of a frequency converting circuit is supplied and a secondary-side which generates a high voltage. A capacitor is connected to a secondary coil of the high-voltage transformer, thereby forming a resonance circuit.
Claims20
An X-ray computer tomography apparatus comprising:
- a static gantry section;
- a rotatable gantry section which is provided on said static gantry section in a rotatable manner and has an X-ray tube for generating X rays;
- a frequency converting circuit which is connected to an alternating-current power source and converts the output voltage from the alternating-current power source into a desired high-frequency voltage;
- a high-voltage transformer which transmits the output of said frequency converting circuit from said static gantry section to said rotatable gantry section and steps up the output to a desired high voltage;
- and
- a rectifier circuit which converts the alternating-current voltage outputted from said high-voltage transformer into a direct-current voltage and supplies the direct-current voltage to said X-ray tube, wherein
- said high-voltage transformer including:
- a primary-side which is provided on said static gantry section and to which the output of said frequency converting circuit is supplied, and
- a resonance circuit with a capacitor connected to a winding of a secondary-side, which is provided on said rotatable gantry section and generates said high voltage.
An X-ray computer tomography apparatus comprising:
- a static gantry section;
- a rotatable gantry section which has an X-ray tube for radiating X rays and is rotatable with respect to said static gantry section;
- and
- power transmission section which transmits power from said static gantry section to said rotatable gantry section in a noncontacting manner, wherein said power transmission section includes a high-voltage transformer that steps up said power and has such a divided structure as has its primary side on said static gantry section and its secondary side on said rotatable gantry section.
An X-ray computer tomography apparatus comprising:
- a static gantry section;
- a rotatable gantry section which has an X-ray tube for radiating X rays and is rotatable with respect to said static gantry section;
- and
- power transmission section which transmits power from said static gantry section to said rotatable gantry section in a noncontacting manner, wherein
- said rotatable gantry section does not have the primary side of said high-voltage transformer for stepping up power.
An X-ray computer tomography apparatus comprising:
- a static gantry section having an imaging volume;
- a rotatable gantry section mounted opposed to the static gantry section, which rotates around the imaging volume;
- an alternating-current power source provided in the static gantry section;
- a plurality of primary coils which are arranged around the imaging volume of the static gantry section and electrically connected to the alternating-current power source;
- a plurality of primary side cores to each of which the respective primary coils is wound;
- a plurality of secondary side cores arranged on the rotatable gantry section so as to oppose to the primary cores;
- a plurality of secondary cores which are wound around the respective secondary side cores;
- a plurality of resonance circuits one of which is connected to each one of the secondary cores;
- a rectifier circuit which rectifies the outputs of the resonance circuits;
- and
- an X-ray tube connected to the rectifier circuit.
Dependencies are inferred from the claim text.