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X ray imaging apparatus and X ray imaging method

一种摄像设备、X射线的技术，应用在X射线设备、辐射安全装置、用于放射诊断的仪器等方向

Inactive Publication Date: 2008-11-12
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, however, the scheduled process has to be aborted even if it is not completed

Method used

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  • X ray imaging apparatus and X ray imaging method
  • X ray imaging apparatus and X ray imaging method

Examples

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no. 1 example

[0021] Structure of X-ray imaging equipment

[0022] FIG. 1 shows an example of the structure of an X-ray imaging apparatus according to the present invention. An X-ray generating unit (X-ray tube) 102 is an X-ray generating source that irradiates an object (subject) 105 with X-rays. An X-ray generating unit (X-ray tube) 102 is held by one end of a holding unit 101 . The X-ray detection unit 103 is a sensor that detects X-rays irradiated from the X-ray generation unit (X-ray tube) 102 . The X-ray detection unit 103 is held by the other end of the holding unit 101 . An X-ray detection unit 103 and an X-ray generation unit (X-ray tube) 102 are held by a holding unit 101 facing each other. Note that instead of being fixed, the X-ray detection unit 103 and the X-ray generation unit (X-ray tube) 102 may be held in a state movable relative to each other as long as they continue to face each other.

[0023] A bed 104 is provided between the X-ray generation unit (X-ray tube) 10...

no. 2 example

[0074] Figure 5A with 5B is a flowchart showing the operation flow of the X-ray imaging apparatus according to the second embodiment, in which the operations of the steps are performed under the overall control of the CPU 201 . It is assumed that the X-ray imaging apparatus has a structure similar to that of FIGS. 1 and 2 explained in the first embodiment.

[0075] In step S501, the CPU 201 starts the process.

[0076] In step S502, the CPU 201 judges whether or not a trigger for starting irradiation has been input. In step S503 , the X-ray generating unit 102 performs X-ray irradiation based on the X-ray irradiation dose per unit time held by the X-ray irradiation dose management unit 204 .

[0077] In step S504, the CPU 201 determines whether to set the X-ray irradiation dose per unit time manually or automatically (automatic X-ray control) based on the operator's selection operation. If the operator's operation instructs automatic X-ray control (YES in S504), the proce...

no. 3 example

[0094] Figure 7A and 7B are flowcharts showing the operation flow of the X-ray imaging apparatus according to the third embodiment, in which the operations of the steps are performed under the overall control of the CPU 201 . It is assumed that the X-ray imaging apparatus has a structure similar to that of FIGS. 1 and 2 explained in the first embodiment.

[0095] In step S701, the CPU 201 starts the process.

[0096] In step S702, the CPU 201 judges whether or not a trigger signal for starting irradiation has been input. In step S703 , the X-ray generating unit 102 performs X-ray irradiation based on the X-ray irradiation dose per unit time held by the X-ray irradiation dose management unit 204 .

[0097]In step S704, the CPU 201 judges whether or not an instruction to calculate the X-ray irradiation reference dose per unit time has been given. If an instruction to calculate the X-ray irradiation reference dose per unit time has been given (YES in S704), the process advanc...

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Abstract

An X-ray imaging apparatus includes an estimation unit (208) that estimates a cumulative exposure dose of X-rays irradiated onto an object, a remaining exposure tolerance dose calculation unit (213) that calculates a remaining exposure tolerance dose using a difference between a tolerated maximum exposure dose and the cumulative exposure dose, an X-ray irradiation tolerance period calculation unit (206) that calculates an X-ray irradiation tolerance period using a difference between a predetermined scheduled X-ray irradiation period and an actual irradiation period of X-rays irradiated onto the object, an X-ray irradiation reference dose calculation unit (212) that calculates an X-ray irradiation reference dose per unit time that will form a basis of X-ray irradiation based on the remaining exposure tolerance dose and the X-ray irradiation tolerance period, and a control unit (211); that controls X-ray irradiation onto the object by setting an X-ray irradiation dose per unit time within the X-ray irradiation tolerance period based on the X-ray irradiation reference dose.

Description

technical field [0001] The present invention relates to an X-ray imaging device and an X-ray imaging method for preventing exposing a patient to excessive doses of radiation. Background technique [0002] X-ray diagnostic imaging using X-rays has generally been applied to radiographic interpretation using still images, however, in recent years its application has been expanded to include X-ray fluoroscopy and surgical support. However, X-ray fluoroscopy and surgical support, while very beneficial, inevitably expose the patient to radiation, and the risk of exposure must always be considered when performing diagnostic X-rays and surgical support. Despite these risks, until now the X-ray dose has generally been manually adjusted by the operator providing the medical care. The operator selects the appropriate X-ray dose according to the purpose of the operation, the purpose of the inspection, the location of the inspection, the patient's physique, age and sex, and the characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/10H05G1/42G08B21/02
CPCA61B6/542A61B6/4441
Inventor 犬贺美帆吉田崇
Owner CANON KK
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