G-shaped arm X-ray machine, three-dimensional image generating method and device for G-shaped arm X-ray machine
An X-ray machine and three-dimensional imaging technology, which is applied in the field of medical equipment, can solve the problems of long irradiation time of the measured target, and achieve the effect of reducing acquisition time and irradiation time
Inactive Publication Date: 2012-10-10
BEIJING EAST WHALE IMAGE TECH
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[0011] The main purpose of the present invention is to provide a three-dimensional image generation method and device of a G-arm X-ray machine and a G-arm X-ray machine to solve the problem of three-dimensional cone-beam CT scanning reconstruction by a C-arm X-ray machine in the prior art. In the process of imaging, the problem that the measured target is exposed to X-ray for a long time
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[0035] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0036] Figure 1A and Figure 1B It is a schematic diagram of the G-arm frame in the G-arm X-ray machine according to the embodiment of the present invention in the initial angle state and the target angle state, as shown in Figure 1, different from the single-channel X-ray tube of the C-arm, the G-arm The X-ray machine is fixedly provided with two X-ray tubes 1A, 2A and two corresponding X-ray receivers 1B, 2B, and the G-arm 3 is a 3 / 4 arc structure. When the G arm frame 3 is in the initial position, the first X-ray tube 1A is used to emit transverse cone beam X-rays, and the first X-ray receiver 1B is arranged on the G arm frame 3 opposite to the first X-ray tube 1A. The position is used to r...
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The invention provides a G-shaped arm X-ray machine, a three-dimensional image generating method and device for the G-shaped arm X-ray machine. The method comprises the following steps: controlling a G-shaped arm frame to rotate for a target angle from an initial angle; keeping currents and voltages of two X-ray tubes unchanged during the rotating process; obtaining multiple sets of two-dimensional projection data of a detected object when the G-shaped arm is at different angles, wherein each set of two-dimensional projection data comprises two paths of projection data; calculating by utilizing the multiple sets of two-dimensional projection data according to an FDK algorithm or an FDK correcting algorithm, thereby obtaining a three-dimensional image of the detected object; and outputting the three-dimensional image of the detected object. By obtaining the two paths of projection data, the time for obtaining the data is greatly reduced, the illuminating time of the detected object under X-rays is effectively reduced, the three-dimensional image of the detected object is directly outputted, the overview information of the detected object is reflected, and the problem of the prior art that the illuminating time of the detected object under X-rays is long is solved.
Description
technical field [0001] The invention relates to the field of medical devices, in particular to a three-dimensional image generation method and device for a G-arm X-ray machine and the G-arm X-ray machine. Background technique [0002] At present, the imaging methods of X-ray machines are usually given in the form of two-dimensional images. Existing solutions include computed tomography (Computed Tomography, CT), C-arm fluoroscopy images, and so on. However, two-dimensional image information can only give image data of a certain angle or a certain section, and cannot reflect the overall information of the imaging part. [0003] In recent years, there have also been technologies for 3D image reconstruction using 2D projection images, mainly as follows: [0004] Computed tomography technology is to use parallel or sectoral X-rays to measure the ray projection measurement at different angles on the section of the detected target to obtain 360° line projection data, and to obtai...
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Inventor 厉夫兵魏世宇朱洵
Owner BEIJING EAST WHALE IMAGE TECH