Method and system for configuring an x-ray imaging system
a technology of x-ray imaging and configuration method, which is applied in the field of x-ray imaging system, can solve the problems of inefficient use of x-ray system, time-consuming and prone to errors, image retakes caused by and erroneous configuration, etc., and achieves less manual steps, faster configuration of system, and efficient use
Inactive Publication Date: 2017-04-27
AGFA NV
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Benefits of technology
The patent describes a method for creating a 3D image of an object using a depth camera and an X-ray system. The depth camera can capture the distance between the camera and the closest object in front of it, and this data can be used to create a 3D representation of the object. The thickness and size of the object can also be determined from the depth images. By aligning the depth camera with the X-ray system, the image from the camera can be used to determine the thickness and position of the object in the X-ray image. This method allows for accurate and easy measurement of the object's thickness and size, even when the camera and X-ray system are at different angles.
Problems solved by technology
In the case of X-ray imaging, for instance, image retakes caused by and erroneous configuration are especially undesirable due to the harmful nature of X-ray radiation to the subject.
However, this process is time consuming and prone to errors because the operator has no clear view of the applied adjustments.
This results in an inefficient use of the X-ray system and a risk that multiple X-rays have to be captured.
A disadvantage of this this system is that parameter extraction from the 2D images is not always correct, especially not when the cameras are under a large different angle than the X-ray source.
Another disadvantage is that 3D model composition from 2D images is a processor intensive operation.
It is however a disadvantage that only the position can be configured.
Method used
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[0074]FIG. 1 illustrates parts of an X-ray imaging system according to a preferred embodiment. The system comprises an X-ray source 108 or X-ray tube 108 to radiate a subject 105 in order to obtain an X-ray image. The area 103 illustrates the area that would be radiated by the X-ray bundle from the X-ray source 108 in the illustrated setup. This bundle is emitted from the X-ray source 108 along its optical axis 104. It is an object to configure the X-ray imaging system such that the appropriate area on the subject 105 is radiated and thus imaged or, in other words, to configure the X-ray system such that the area 103 at least covers the object 107 to be imaged. The configuration of the X-ray device will be illustrated in the preferred embodiments below for the case where an object 107, i.e., the knee of the subject 105, i.e., a person, is to be imaged. According to the example, it is thus the object to have the have the object 107 within the X-ray bundle, i.e., within the area 103. ...
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A method of automatically configuring an X-ray imaging system for taking an X-ray image of an object includes, first, obtaining one or more depth images from one or more depth cameras covering at least an area covered by an X-ray bundle of an X-ray source. Then, a thickness of the object is determined from the depth image(s). Then, this thickness value is converted to a dose configuration of the X-ray imaging system by taking into account a transmission length of the X-ray bundle through the object and knowledge about tissue types being imaged.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a 371 National Stage Application of PCT / EP2015 / 064686, filed Jun. 29, 2015. This application claims the benefit of European Application No. 14174919.2, filed Jun. 30, 2014, which is incorporated by reference herein in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to the field of X-ray imaging systems and more particular to the automatic obtaining of a configuration of such X-ray imaging systems. Such a configuration may relate to a dose configuration defining the radiation parameters of the X-ray source. Such a configuration may further comprise a resizing configuration in order to get the object that is imaged with a certain size in the X-ray image. Such a configuration may also relate to a position configuration defining what will be in the centre of the captured X-ray image, typically an object of interest.[0004]2. Description of the Related Art[0005]Medical imagi...
Claims
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Login to View More IPC IPC(8): A61B6/00A61B6/08
CPCA61B6/545A61B6/547A61B6/08A61B6/542A61B6/0487
Inventor MERCKX, GERT
Owner AGFA NV