Depth sensing method for x-ray image

Abstract

A depth sensing method for an X-ray image, the method comprising: first performing X-ray imaging on an object to be subjected to sensing, so as to obtain an X-ray planar image of said object; then, selecting the central point of a region of interest from the X-ray planar image, and by means of an ultrasonic probe, performing ultrasonic detection directly above and nearby the central point until the ultrasonic probe receives strong echo having an amplitude that exceeds a set amplitude; on the basis of the time when the strong echo is received, calculating the distance between the position where the strong echo is generated and the ultrasonic probe; and finally, on the basis of the included angle between the scanning plane of the ultrasonic probe and the X-ray planar image, calculating the depth of the region of interest. The sensing method can rapidly sense the depth of a region of interest in an X-ray image.

Description

An X-ray image depth detection method TECHNICAL FIELD

[0001] The present application relates to the field of X-ray photography imaging technology, and particularly relates to an X-ray image depth detection method. BACKGROUND

[0002] X-ray imaging is to generate a projection image of a measured object along an X-ray irradiation direction by detecting the measured object with X-rays, so that the depth information cannot be obtained from the X-ray image, that is, only the projection position of a region of interest can be obtained from the X-ray image, and the depth of the region of interest cannot be obtained. At present, three-dimensional imaging of the measured object can be realized by combining X-ray detection and ultrasonic detection, so that the position of the region of interest in the measured object can be accurately obtained. However, in actual operation, this method has the problems of complex operation, large amount of calculation, and low detection efficiency. In actual application, the accurate three-dimensional image of the region of interest in the measured object is often not required, and only the overall shape and depth position of the region of interest are required. SUMMARY

[0003] The present application aims to provide an X-ray image depth detection method, and particularly to provide a method for detecting the depth of a region of interest in an X-ray image by ultrasonic imaging, which has the advantages of simple operation process, small amount of calculation, and high detection efficiency.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: an X-ray image depth detection method, specifically, first, X-ray imaging is performed on a measured object to obtain an X-ray planar image of the measured object, then a center point of a region of interest is selected in the X-ray planar image, and ultrasonic detection is performed on the center point by using an ultrasonic probe until a strong echo exceeding a set amplitude is received by the ultrasonic probe, the distance between the position of the strong echo and the ultrasonic probe is calculated according to the time when the strong echo is received, and finally the depth of the region of interest is calculated according to the included angle between the scanning plane of the ultrasonic probe and the X-ray planar image.

[0005] Specifically, when calculating the depth of the region of interest, the plane where the X-ray planar image is located is taken as the X-Y plane, the center point of the selected region of interest is denoted as P(x, y), the distance between the position of the strong echo and the ultrasonic probe is denoted as L, the depth of the region of interest is denoted as H, and the included angle between the scanning plane of the ultrasonic probe and the X-ray planar image is denoted as θ, so the depth H of the region of interest is H=L*cosθ.

[0006] Specifically, the calculation formula of the distance L between the position of the strong echo and the ultrasonic probe is L=c*t, wherein c is the sound speed of the ultrasonic wave in the measured object, and t is the time interval from emitting the ultrasonic wave to receiving the strong echo.

[0007] The application has the beneficial effect that by detecting the vicinity of the region of interest of the X-ray imaging with the ultrasonic probe, the depth of the region of interest in the X-ray image is quickly detected by combining the characteristics of the ultrasonic detection with the projection characteristics of the X-ray imaging, which not only does not require complex operations, but also does not require a large amount of calculation, and facilitates the quick positioning of the depth of the region of interest in the X-ray image, thereby improving the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 is a detection principle diagram of the X-ray image depth detection method in the embodiment. DETAILED DESCRIPTION

[0009] In the embodiment 1, referring to Fig. 1, an X-ray image depth detection method is provided, specifically, first, an X-ray imaging is performed on a to-be-detected object to obtain an X-ray planar image of the to-be-detected object, then a center point of a region of interest is selected in the X-ray planar image, and an ultrasonic detection is performed near the directly above of the center point with an ultrasonic probe until a strong echo exceeding a set amplitude is received by the ultrasonic probe, the distance between the position of the strong echo and the ultrasonic probe is calculated according to the time of receiving the strong echo, and finally the depth of the region of interest is calculated according to the angle between the scanning plane of the ultrasonic probe and the X-ray planar image.

[0010] Specifically, when calculating the depth of the region of interest, the plane where the X-ray planar image is located is taken as the X-Y plane, the center point of the selected region of interest is denoted as P(x, y), the distance between the position of the strong echo and the ultrasonic probe is denoted as L, the depth of the region of interest is denoted as H, and the angle between the scanning plane of the ultrasonic probe and the X-ray planar image is denoted as θ, then the depth H of the region of interest is H = L*cosθ. In order to facilitate the calculation of the depth H of the region of interest, when performing the ultrasonic detection, the ultrasonic probe can be vertically directed to the X-ray planar image, that is, the angle between the scanning plane of the ultrasonic probe and the X-ray planar image is 90 degrees, at this time, H = L.

[0011] Specifically, the calculation formula of the distance L between the position of the strong echo and the ultrasonic probe is L = c*t, wherein c is the sound speed of the ultrasonic wave in the to-be-detected object, and t is the time interval from emitting the ultrasonic wave to receiving the strong echo.

[0012] Of course, the above is only the preferred embodiment of the application, and does not limit the use range of the application, therefore, any equivalent changes made on the principle of the application shall be included in the protection scope of the application.

Claims

1. A method of depth probing of an X-ray image, characterized by: First, the object to be measured is imaged by X-ray to obtain an X-ray planar image of the object to be measured, then a center point of a region of interest is selected in the X-ray planar image, and ultrasound detection is performed near the center point directly above the ultrasound probe until the ultrasound probe receives a strong echo exceeding a set amplitude, the distance between the position of the strong echo and the ultrasound probe is calculated according to the time of receiving the strong echo, and finally the depth of the region of interest is calculated according to the angle between the scanning plane of the ultrasound probe and the X-ray planar image.

2. The method of claim 1, wherein: When calculating the depth of the region of interest, the plane where the X-ray planar image is located is taken as the X-Y plane, the center point of the selected region of interest is taken as P(x, y), the distance between the position of the strong echo and the ultrasound probe is taken as L, the depth of the region of interest is taken as H, and the angle between the scanning plane of the ultrasound probe and the X-ray planar image is taken as θ, then the depth H of the region of interest is L*cosθ.

3. The method of claim 2, wherein: The calculation formula of the distance L between the position of the strong echo and the ultrasound probe is L=c*t, wherein c is the sound speed of the ultrasound wave in the object to be measured, and t is the time interval from emitting the ultrasound wave to receiving the strong echo.

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