JP2005177215A - Image processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it has been difficult to determine a cutting out region being suitable for the diagnosis of a subject for X-ray image data. <P>SOLUTION: For this device, an X-ray irradiation region acquiring means acquires an X-ray irradiation region from among objective images, and a subject region acquiring means acquires a subject region from among the X-ray irradiation region. A cutting out region determining means determines a cutting out region from the position of the subject region, and an image cutting out means cuts out a cutting out region of the objective image. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an image processing apparatus that cuts out a part of an X-ray image, and more particularly to an image processing apparatus that cuts out an area determined based on the position of an inspection object area.

Currently, the construction of a system using a two-dimensional X sensor is going on (for example, see Patent Document 1).
FIG. 5 is an X-ray image, 501 indicates the entire image, 502 indicates an X-ray irradiation area, and 503 indicates a cut-out area.

  When displaying X-ray image data captured by any imaging device such as a sensor or a camera on a monitor screen, an X-ray diagnostic film or the like, it is common to cut out and display a partial region of the captured X-ray image data. Is. For example, when the X-ray image 501 is displayed on the X-ray diagnostic film, an area to be displayed is determined as the cut-out area 503 from the X-ray image data 501 and only the cut-out area is displayed on the X-ray diagnostic film. Is called.

As a method for determining such a cutout region, a method is known in which an X-ray irradiation region 502 is acquired from the X-ray image 501 and the cutout region 503 is determined based on the position of the acquired X-ray irradiation region. Yes.
Japanese Patent Laid-Open No. 10-305030

  However, in the method of determining the cutout region based on the position of the X-ray irradiation region, when the inspection object is arranged biased to the end of the X-ray irradiation region, the inspection target is also the end portion in the cutout region. When displaying on a monitor screen or an X-ray diagnostic film, many unnecessary areas may be displayed to reduce the diagnostic accuracy and diagnostic efficiency of the diagnostician.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to obtain an image processing apparatus that determines a cutout region suitable for diagnosis of an object to be inspected with respect to X-ray image data. To do.

  In the first aspect of the invention, the X-ray irradiation area acquisition unit acquires the X-ray irradiation area from the target image, and the inspection object area acquisition unit acquires the inspection object area from the X-ray irradiation area. The cutout area determining means determines the cutout area of the target image based on the position of the object area, and the image cutout means cuts out the cutout area of the target image.

  In the invention according to claim 2, the X-ray irradiation area acquisition means acquires the X-ray irradiation area from the target image, the inspection object area acquisition means acquires the inspection object area from the X-ray irradiation area, The cutout area determining means determines a rectangular area centered on the inspection object area as the cutout area, and the image cutout means cuts out the cutout area of the target image.

  In the invention according to claim 3, the X-ray irradiation area acquisition means acquires the X-ray irradiation area from the target image, the inspection object area acquisition means acquires the inspection object area from the X-ray irradiation area, The cutout area determining means determines the minimum rectangular area including all of the inspection objects as the cutout area centered on the inspection object area, and the image cutout means cuts out the cutout area of the target image.

  According to the first aspect of the present invention, there is an effect that an image cut-out area is determined based on the position of the inspected object area existing inside the X-ray irradiated area, and the image can be cut out. As a result, it is possible to improve the diagnostic accuracy and diagnostic efficiency of the inspected object.

  According to the second aspect of the present invention, there is an effect that a rectangular area centering on the area to be inspected present inside the area irradiated with X-rays is determined as an image cut-out area, and the image can be cut out. As a result, there is an effect that the diagnostic accuracy and diagnostic efficiency of the object to be inspected can be improved.

  According to the third aspect of the present invention, the minimum rectangular area including all the inspected object area centered on the inspected object area present in the area irradiated with X-rays is determined as the image cutout area, It is possible to cut out, and as a result, there is an effect that the diagnostic accuracy and diagnostic efficiency of the object to be inspected can be improved.

  An embodiment of the present invention will be described below.

Embodiment 1 FIG.
FIG. 1 shows a first embodiment of the present invention. 1 shows an X-ray imaging apparatus 100. That is, the X-ray imaging apparatus 100 is an X-ray imaging apparatus having an image processing function, and includes a preprocessing circuit 106, a cpu 108, a main memory 109, an operation panel 110, a display monitor 111, and an image processing circuit 112. Data is exchanged with each other via the CPU bus 107.

  The X-ray imaging apparatus 100 includes a data acquisition circuit 105 connected to the preprocessing circuit 106, a two-dimensional X-ray sensor 104 and an X-ray generation circuit 101 connected to the data acquisition circuit 105, and these These circuits are also connected to the CPU bus 107.

  In the X-ray imaging apparatus 100 as described above, first, the main memory 109 stores various data necessary for processing by the CPU 108 and includes a work memory for work of the CPU 108.

  The CPU 108 uses the main memory 109 to perform operation control of the entire apparatus according to an operation from the operation panel 110. Thereby, the X-ray imaging apparatus 100 operates as follows.

  First, the X-ray generation circuit 101 emits an X-ray beam 102 to the inspection object 103.

  The X-ray beam 102 emitted from the X-ray generation circuit 101 passes through the object 103 while being attenuated, reaches the two-dimensional X-ray sensor 104, and is output as an X-ray image by the two-dimensional X-ray sensor 104. The Here, the X-ray image output from the two-dimensional X-ray sensor 104 is a human body image such as a hand image.

  The data acquisition circuit 105 converts the X-ray image output from the two-dimensional X-ray sensor 104 into an electric signal and supplies it to the preprocessing circuit 106. The preprocessing circuit 106 performs preprocessing such as offset correction processing and gain correction processing on the signal (X-ray image signal) from the data acquisition circuit 105. The X-ray image signal preprocessed by the preprocessing circuit 106 is transferred as an original image to the main memory 109 and the image processing circuit 112 via the CPU bus 107 under the control of the CPU 108.

  112 is a block diagram showing the configuration of an image processing circuit, an X-ray irradiation area acquisition circuit 113 for acquiring an X-ray irradiation area, an inspection object area acquisition circuit 114 for acquiring an inspection object area from the X-ray irradiation area, A cut-out area determination circuit 115 that determines a cut-out area based on the position of the inspected object area and an image cut-out circuit 116 that cuts out the target image in the cut-out area are provided.

  FIG. 2 shows the first embodiment. FIG. 3 is a diagram showing a process flow of the cut-out area determination circuit 115. FIG. 4 shows the first embodiment. , 401 is an original image, 402 is an acquired X-ray irradiation area, 403 is an inspection object area acquired from the X-ray irradiation area, and 404 is determined based on the position of the inspection object area. The cut-out rectangular area 405 shows an image after cut-out.

  Next, the operation of the image processing circuit 112 will be described according to the processing flow of FIG.

  The image processing circuit 112 that has received the original image 401 processed by the preprocessing circuit 106 via the CPU bus 107 under the control of the CPU 108 acquires the X-ray irradiation region 402 of the original image 401 by the X-ray irradiation region acquisition circuit 113. (S201). Next, the inspection object region 403 is acquired from the inside of the X-ray irradiation region 402 by the inspection object region acquisition circuit 114 (s202). Next, the cutout region determination circuit 115 determines the cutout region 404 with reference to the position of the inspection object region 403 (s203). The process flow will be described with reference to FIG. First, position information of the inspection object region 403 is acquired (s301). This is obtained from the output result of the inspection subject region acquisition circuit 114 and the coordinate system set in the target image. Here, a coordinate system is set in which the upper left of the target image is the origin, the horizontal direction is the X axis, and the vertical direction is the Y axis. Next, the upper, lower, left, and right ends Tu, Tb, Tl, and Tr of the cutout area are determined (s302 to s305). In this embodiment, the following are determined.

Tu = Min (y) (y ∈ I)
Tb = Max (y) (y ∈ I)
Tl = Min (x) (x ∈ I)
Tr = Max (x) (x ∈ I)
Here, x and y represent the coordinates of each pixel of the target image, and I is a set of pixels in the inspection object region 403. Min and Max represent a minimum value and a maximum value, respectively. The cutout area 404 determined by these processes becomes the output of the cutout area determination circuit 115.

  Next, the image cutout circuit 116 cuts out the target image using the cutout area 404 and obtains a cutout image 405 (s204). Finally, the cut-out image 405 is displayed on the display monitor 111 (s205).

  As described above, the first embodiment. According to the above, since the image cutout region is determined based on the position of the inspection object region, the inspection object is arranged in the center even when the inspection object is arranged at the end of the X-ray irradiation region. The image can be cut out, and there is an effect that it is possible to avoid a problem that many unnecessary areas (for example, a blank area) are displayed when displaying on a monitor screen or an X-ray diagnostic film. As a result, there is an effect that the diagnostic accuracy and diagnostic efficiency of the inspected object by the diagnostician can be improved as compared with the conventional method.

Embodiment 1 of the Invention It is a block diagram which shows the structure of these. Embodiment 1 FIG. It is a figure which shows the flow of a process of. Embodiment 1 FIG. It is a figure which shows the flow of a cutting-out area | region determination process. Embodiment 1 FIG. FIG. It is a figure which shows a hand part image.

Explanation of symbols

113 X-ray irradiation area acquisition circuit 114 Inspection object area acquisition circuit 115 Cutout area determination circuit 116 Image cutout circuit

Claims (3)

  X-ray irradiation area acquisition means for acquiring an X-ray irradiation area from an X-ray image, and inspection object area acquisition means for acquiring an inspection object area from the X-ray irradiation area obtained by the X-ray irradiation area acquisition means A cutout area determining means for determining a cutout area of the target image with reference to the position of the inspected object area obtained by the inspected object area acquiring means, and the area determined by the cutout area determining means from the target image An image processing apparatus comprising: an image cutout unit that cuts out.   2. The image processing apparatus according to claim 1, wherein the cut-out area determination unit uses a rectangular area centered on the inspection object area obtained by the inspection object area acquisition unit as a cut-out area.   2. The cut-out area determining unit is characterized in that a cut-out area is defined as a minimum rectangular area including all of the inspected object areas centered on the inspected object area obtained by the inspected object area acquiring unit. The image processing apparatus described.

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