X-ray diagnostic device and dosage administration method

Abstract

An x-ray diagnostic device detects x-rays which are outputted from an x-ray source and are transmitted through a subject and generates an image of the inside of the subject, comprising a detector unit, an x-ray intensity distribution data generating unit, and an incident dosage distribution data generating unit. The detector unit detects the intensity of x-rays which are outputted from the x-ray source. On the basis of the result of the detection by the detector unit, the x-ray intensity distribution data generating unit generates x-ray intensity distribution data which denotes x-ray intensity for each of a plurality of partial regions of an irradiation zone of the x-rays from the x-ray source. On the basis of the x-ray intensity distribution data, the incident dosage distribution data generating unit generates incident dosage distribution data which denotes the dosage of the x-rays which are outputted from the x-ray source and incident to the subject.

Description

technical field [0001] Embodiments of the present invention relate to technologies of an X-ray diagnostic apparatus and a radiation dose management method. Background technique [0002] An X-ray diagnostic apparatus irradiates a patient with X-rays from an X-ray tube, captures the X-rays transmitted through a subject by an X-ray detector, and generates a shadow image proportional to the amount of the transmitted radiation, that is, a fluoroscopic image or a photographic image. Then, an operator such as a doctor or a laboratory technician (hereinafter simply referred to as an “operator”) performs a diagnosis of a subject by observing a fluoroscopic image or a photographic image generated by the X-ray diagnostic apparatus. [0003] In such a diagnosis using an X-ray diagnostic apparatus, management of the dose of radiation irradiated to a subject is very important. This is because, when the incident dose is large, there is a risk of irradiation damage to living tissue. [00...

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Problems solved by technology

This is because there is a risk of irradiation damage to living tissues when the incident radiation dose is large

[0004] On the other hand, the intensity distribution of X-rays irradiated from the X-ray tube may vary depending on the configuration of the X-ray diagnostic apparatus or the conditions at the time of imaging.

For example, when an electron beam collides with an anode in an X-ray tube to generate X-rays, the intensity distribution of the generated X-rays may be deviated due to the heel effect.

In addition, depending on the conditions of the X-ray stop or filter, the intensity of X-rays transmitted from a part of the irradiation field sometimes decreases

In addition, when a ceiling is interposed between the X-ray tube and the subject, part of the X-rays is absorbed by the ceiling at the portion where the ceiling is interposed, and the X-ray intensity at this portion decreases.