# US 2008/0187104 A1 · Battery-powered portable x-ray imaging apparatus

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- Number: US 2008/0187104 A1
- Document ID: US20080187104A1
- Status: Published application
- Kind: A1
- Application number: 11/953,755
- Filed: 2007-12-10
- Published: 2008-08-07
- Earliest claimed: 2006-12-11
- Assignees: Poskom Co., Ltd.
- Inventors: Ki-Bong Sung; Jong-Lae Park
- Web page: https://patentgrep.com/patent/US20080187104A1

## CPC

- H05G 1/32: Supply voltage of the X-ray apparatus or tube
- H05G 1/06: X-ray tube and at least part of the power supply apparatus being mounted within the same housing
- H05G 1/10: Power supply arrangements for feeding the X-ray tube {(supply circuits with converters in general H02M; supply circuits for emitters and amplifiers H04B1/16 - H04B1/1623)}
- H05G: X-RAY TECHNIQUE (investigating or analysing materials by the use of X-rays G01N23/00; apparatus for X-ray photography G03B42/02; X-ray tubes H01J35/00; TV systems having X-ray input H04N5/321)

## Abstract

A battery-powered x-ray imaging apparatus uses a battery with a reduced capacity as a power source. The x-ray imaging apparatus includes a DC-AC converting part for converting a direct current of a battery to an alternating current, a high-voltage transformer for increasing a magnitude of the alternating current to output a high-voltage alternating current, an AC-DC converting part for converting the high-voltage alternating current to a high-voltage direct current, and an x-ray tube having an anode terminal and a cathode terminal electrically connected to the AC-DC converting part. The x-ray tube is designed to generate x-rays by allowing electrons emitted from the cathode terminal to impinge on the anode terminal. The DC-AC converting part, the high-voltage transformer, the AC-DC converting part and the x-ray tube are sealingly received within the housing part filled with oil.

## Claims

### Claim 1

An x-ray imaging apparatus, comprising:
a DC-AC converting part for converting a direct current of a battery to an alternating current;
a high-voltage transformer for increasing a magnitude of the alternating current to output a high-voltage alternating current;
an AC-DC converting part for converting the high-voltage alternating current to a high-voltage direct current;
an x-ray tube having an anode terminal and a cathode terminal electrically connected to the AC-DC converting part, the x-ray tube generates x-rays by allowing electrons emitted from the cathode terminal to impinge on the anode terminal; and
a housing part for sealingly receiving the DC-AC converting part, the high-voltage transformer, the AC-DC converting part and the x-ray tube, the housing part filled with oil.

### Claim 2 (depends on 1)

The x-ray imaging apparatus as recited in claim 1, wherein the housing part includes a side panel having inner and outer surfaces, the DC-AC converting part attached to the inner surface of the side panel;
and further comprises a capacitor for charging and discharging the direct current of the battery, the capacitor attached to the outer surface of the side panel.

### Claim 3 (depends on 2)

The x-ray imaging apparatus as recited in claim 2, wherein the side panel of the housing part is a printed circuit board for electrically interconnecting the DC-AC converting part and the capacitor.

### Claim 4 (depends on 2)

The x-ray imaging apparatus as recited in claim 2, wherein a connector for transmitting an electric signal to and from the housing part is attached to the side panel of the housing part.

### Claim 5 (depends on 2)

The x-ray imaging apparatus as recited in claim 2, wherein the DC-AC converting part includes a switching element for performing a switching operation to convert the direct current charged in the capacitor to a high-frequency alternating current and a bus bar connected to the capacitor through the side panel of the housing part for supplying the direct current charged in the capacitor to the switching element.

### Claim 6 (depends on 5)

The x-ray imaging apparatus as recited in claim 5, wherein the switching element is selected one of a field-effect transistor and an insulated gate bipolar transistor.

### Claim 7 (depends on 5)

The x-ray imaging apparatus as recited in claim 5, wherein the switching element is kept in contact with the bus bar.