ROI (Region of Interest) window width and position adjusting method of medical image

A region of interest, medical image technology, applied in the field of window width and window level adjustment for the region of interest of medical images ROI, to achieve good results

Inactive Publication Date: 2015-11-04
NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method needs to set the CT value in advance, if it is not set, it still needs to manually adjust the window

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  • ROI (Region of Interest) window width and position adjusting method of medical image
  • ROI (Region of Interest) window width and position adjusting method of medical image
  • ROI (Region of Interest) window width and position adjusting method of medical image

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Embodiment Construction

[0031] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] Figure 4 It is the image before the ROI window adjustment of the digital image of the human brain. In this image, the image of interest is selected, and the selected area is already in the Figure 4 Marked out.

[0033] In this region of interest, a meaningful image should contain more pixels. Then, in the histogram of this area, the area of ​​interest will have a higher peak, and then slow down to both sides, and the abscissa when the pixel is smaller than the specified value is used as the boundary to calculate the window width and window level, such as figure 2 shown. During this process, sometimes two peaks may appear in the histogram, so including both peaks in the window width and window level indicates that the images represented by the two peak areas are both images of interest.

[0034] The specific process is as im...

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Abstract

The invention relates to an ROI window width and position adjusting method of a medical image. The method comprises the steps that a rectangular ROI of the image is selected; all pixel points of the region is scanned, the sum of all the pixel points is calculated, and a histogram array is solved; the average of the pixel points is calculated; a coefficient k is set, each element in the histogram array is scanned, and the first satisfied point and the last satisfied point are found; the window width and position are calculated; and an original image is converted to a display gray scale interval for imaging. It is only required to provide the ROI to automatically calculate the optimal window width and position of the region needless manual adjustment, and the image of the region can be clearly displayed.

Description

technical field [0001] The present invention relates to a medical image display processing method, in particular to a method for adjusting window width and window level for a ROI (Region of Interest) of a medical image. Background technique [0002] In the technical field, a region to be processed is outlined in the form of a box, circle, ellipse, irregular polygon, etc. in a processed medical image, and is called a region of interest. All digital medical images currently use DICOM (Digital Imaging and Communication of Medicine, medical digital imaging and communication). The standard defines that each pixel of an image is represented by 8 to 16 bits, and most of them are larger than 8 bits. But the pixels of a grayscale image on a computer can only be represented by 8 bits. Therefore, it is necessary to adjust the window width and window level to image the original image on the computer. [0003] Window Technique is a display technique used by doctors to observe normal t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0012G06T2207/10081G06T2207/10088G06T2207/20021G06T2207/20104
Inventor 张逸凡李文源艾育华陈芳炯刘哲星
Owner NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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