# US 11,452,195 B2 · X-ray device

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- Number: US 11,452,195 B2
- Document ID: US11452195B2
- Status: Granted
- Kind: B2
- Application number: 17/268,370
- Filed: 2019-06-25
- Published: 2021-06-24
- Granted: 2022-09-20
- Earliest claimed: 2018-09-11
- Assignees: Shimadzu Corporation
- Applicants: Shimadzu Corporation
- Inventors: Tomoaki Urata
- Web page: https://patentgrep.com/patent/US11452195B2

## CPC

- H05G 1/34: Anode current, heater current or heater voltage of X-ray tube
- H05G 1/54: Protecting {or lifetime prediction}(overload protection combined with control H05G1/46)
- A61B 6/00: Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment (instruments measuring radiation intensity for application in the field of nuclear medicine, e.g. in vivo counting, G01T1/161)
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

An X-ray device includes a degree-of-wear detection unit for detecting a degree-of-wear of an emitter, an adhesion amount estimation unit for estimating an adhesion amount of a conductive material onto an envelope based on the degree-of-wear of the emitter and a relation between the degree-of-wear of the emitter and an adhesive amount of the conductive material onto the envelope stored in a storage unit.

## Claims

### Claim 1

An X-ray device comprising:
an X-ray generation unit including an emitter made of a conductive material, the emitter being configured to emit electrons, a target for generating X-rays by being collided by the electrons emitted from the emitter, and an envelope accommodating the emitter and the target;
a degree-of-wear detection unit configured to detect a degree-of-wear of the emitter;
a storage unit configured to store a relation between the degree-of-wear of the emitter and an adhesion amount of the conductive material constituting the emitter onto the envelope; and
an adhesion amount estimation unit configured to estimate the adhesion amount of the conductive material constituting the emitter onto the envelope based on the degree-of-wear of the emitter and a relation between the degree-of-wear of the emitter and the adhesion amount of the conductive material constituting the emitter stored in the storage unit.

### Claim 2 (depends on 1)

The X-ray device as recited in claim 1,
wherein the degree-of-wear detection unit detects the degree-of-wear of the emitter from a voltage, a current, or an energization time of the emitter.

### Claim 3 (depends on 1)

The X-ray device as recited in claim 1, further comprising:
a temperature sensor,
wherein the adhesion amount estimation unit estimates the adhesion amount of the conductive material constituting the emitter onto the envelope by utilizing a temperature of the X-ray generation unit or a temperature of an insulation oil in the X-ray generation unit detected by the temperature sensor.

### Claim 4 (depends on 1)

The X-ray device as recited in claim 1, further comprising:
an attitude sensor configured to detect an attitude of the X-ray generation unit,
wherein the adhesion amount estimation unit estimates the adhesion amount of the conductive material constituting the emitter onto the envelope by utilizing the attitude of the X-ray generation unit detected by the attitude sensor.

### Claim 5 (depends on 1)

The X-ray device as recited in claim 1,
wherein the storage unit further stores a relation between the adhesion amount of the conductive material constituting the emitter onto the envelope and a probability of occurrence of a creeping discharge onto the envelope, and
wherein the X-ray device further comprises a creeping discharge estimation unit configured to estimate the probability of occurrence of the creeping discharge based on the degree-of-wear of the emitter, the relation between the degree-of-wear of the emitter and the adhesion amount of the conductive material constituting the emitter stored in the storage unit, and a relation between the adhesion amount of the conductive material constituting the emitter onto the envelope and the probability of occurrence of the creeping discharge onto the envelope stored in the storage unit.

### Claim 6 (depends on 5)

The X-ray device as recited in claim 5,
wherein when the probability of occurrence of the creeping discharge estimated by the creeping discharge estimation unit exceeds a preset value, a warning display is performed.

### Claim 7 (depends on 1)

The X-ray device as recited in claim 1,
wherein the storage unit further stores a relation between the adhesion amount of the conductive material constituting the emitter onto the envelope and a transmission rate of the X-rays passing through the envelope, or a relation between the adhesion amount of the conductive material constituting the emitter onto the envelope and a spectrum of the X-rays passing through the envelope, and
wherein the X-ray device further comprises an image processing unit configured to change an image processing condition of an X-ray image to be displayed on a display unit based on the adhesion amount of the conductive material constituting the emitter onto the envelope and, a relation between the adhesion amount of the conductive material constituting the emitter onto the envelope and the transmission rate of the X-rays passing through the envelope stored in the storage unit or a relation between the adhesion amount of the conductive material constituting the emitter onto the envelope and a spectrum of the X-rays passing through the envelope stored in the storage unit.