Dicom image display problem, please master help, thank you very much!

hzhzdh8

Hello everyone, my brother is now using dicom as a browser for image.
The various tag data in the dicom file are already readable. When displaying pixel information, I encountered a problem:
The images I am looking for are all OW-shaped.
Bits Allocated = 16
Bits Stored = 16
High Bit = 15
window center = 40
window width = 400
I put every two bytes of data into the last two bytes of an int. Then use the Toolkit class in java, the code is as follows:
            byte pixelData [] = new byte [fi.width * fi.height * 2];
        int imageData [] = new int [fi.width * fi.height];
        Ranch
        try {

        RandomAccessFile raf = new RandomAccessFile (directory + fileName, "r");
        raf.seek (fi.pixelData);
        System.out.println (fi.pixelData);
        raf.read (pixelData, 0, fi.width * fi.height * 2);
        }
        catch (Exception e)
        {
        e.printStackTrace ();
        }
        int currentLine = 0;
        int k = 0;
        for (int j = 0; j <fi.height; j ++)
        {
        Ranch
        for (int i = 0; i <fi.width; i ++)
        {
        int intdata = ((int) pixelData [2 * k]) << 8;
        intdata = intdata | (int) pixelData [2 * k + 1];
        imageData [fi.width * currentLine + i] = intdata;
        k ++;
        Ranch
        }
        currentLine ++;
        }
        image = Toolkit.getDefaultToolkit (). createImage (new MemoryImageSource (fi.width, fi.height, imageData, 0, fi.width));

But the resulting image is light yellow. Not a grayscale image. I think it must be that the intdata value of each pixel should be converted before it can be placed in the imageData array.
But I don't know how to switch or how to adjust the window width and window level.
Please troubleshoot your code to make it appear grayscale.
thank you very much!

联盟上将

All I can tell you to do is to adjust the window width and level.
It probably means this:
    In an area of ​​0-255 color range, choose a small area such as the range of 100-199, and use different algorithms to
Pixel information is mapped to the past (the simplest is the average value y=x/256*100+100; of course there are other non-linear methods).
    The window width refers to the range. The window level refers to the midpoint of the range. Window width=100, window level=49.