X-ray imaging device

Abstract

Provided is an X-ray imaging device that automatically adjusts a tube current value in accordance with changes in the one pixel size and the tube voltage value v of an acquired image. A position setting unit (9c) sets the geometric positional relationship among the X-ray generator (1), the subject (4), and the X-ray detector (3). A tube current calculation unit (9e) obtains change characteristicsbetween one pixel size of an image and a focal point size with respect to anode power of an X-ray generator (1) based on the geometric position of the X-ray generator (1), the subject (4), and the X-ray detector (3), and calculates the tube current value i on the basis of a tube voltage value v determined from the subject (4). The X-ray control unit (12) determines the anode power of the X-ray generator (1) on the basis of the tube current value i and the tube voltage value v, and controls the output of the X-ray generator (1) on the basis of the determined anode power.

Description

technical field

[0001] Embodiments of the present invention relate to an X-ray imaging apparatus that automatically sets radiation conditions based on the size of one pixel of an acquired image. Background technique

[0002] In an X-ray imaging device such as an X-ray fluoroscopy device or an X-ray computed tomography (CT) device, for example, as shown in Patent Document 1 to Patent Document 3, the tube voltage value v and the tube current value i are used. Two parameters to control the X-ray projection conditions. When most X-ray generators increase the anode power (tube voltage value v×tube current value i), the focus size of X-rays will become larger, resulting in blurred images.

[0003] In the conventional device, the operator must input the values ​​of tube voltage and tube current into the device to adjust the focus size while observing the blurring of the image. At this time, if the focus size is to be kept small to avoid blurring of the image, the anode power will...

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