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    • 33. 发明授权
    • Method and apparatus for postprocessing medical images
    • 用于后处理医学图像的方法和装置
    • US5509084A
    • 1996-04-16
    • US247410
    • 1994-05-23
    • Yuko Tanaka
    • Yuko Tanaka
    • A61B5/055A61B6/03G06T1/00G06T5/00G06T7/00G06T11/80G06K9/00
    • G06K9/3233G06T7/0012G06T7/004G06T7/0081G06T2207/10072G06T2207/20132G06T2207/30004
    • A method and apparatus are specialized in utilizing a two dimensional histogram for designating a ROI including accurate functional information of a lesion in tissues. A pair of medical images imaged at an identical position of a patient under different imaging conditions is provided by an image providing element. Each of the images extends two-dimensionally and consists of a plurality of pixels. A two-dimensional histogram is calculated by a histogram calculating element and displayed by a histogram displaying element. The histogram projects a function between pixel intensities of the images and frequencies of the pixel intensities. A desired region is then designated by a region designating element on the histogram displayed. Finally, pixels of the plural images equal in pixel intensities to pixels composing the desired designated region are specified by a pixel specifying element as a finally designated ROI.
    • 一种方法和装置专门利用二维直方图来指定包括组织中病变的精确功能信息的ROI。 通过图像提供元件提供在不同成像条件下在患者的相同位置成像的一对医学图像。 每个图像二维延伸并由多个像素组成。 二维直方图由直方图计算元件计算并由直方图显示元素显示。 直方图投影图像的像素强度和像素强度的频率之间的函数。 然后在所显示的直方图上由区域指定元素指定期望的区域。 最后,像素强度等于构成所需指定区域的像素的多个图像的像素由像素指定元素指定为最终指定的ROI。
    • 34. 发明授权
    • Three-dimensional image display apparatus using numerical projection
    • 三维图像显示装置采用数字投影
    • US5412764A
    • 1995-05-02
    • US718977
    • 1991-06-21
    • Yuko Tanaka
    • Yuko Tanaka
    • A61B6/03G06T1/00G06T15/08G06F15/62
    • G06T15/06G06T15/40
    • An imaginary plane and a projection plane are set on both sides of three-dimensional image data to be parallel to each other. A plurality of projection rays are projected from the imaginary plane onto the projection plane. Sampling points for pixel values are set on each projection ray. Pixel values at the sampling points are interpolated by using the three-dimensional image data. The maximum value, integral value, standard deviation, and the like of such interpolated pixel values on the projection rays are projected on the projection plane when the sampling points are set, constant sampling periods are set, but the sampling start points are determined by using random numbers for the respective projection rays. With this operation, the phases of the sampling points on all the projection rays are set to be different from each other, thereby preventing moire, on a projected image, which occurs when interpolated pixel values periodically vary.
    • 在三维图像数据的两侧设置虚拟平面和投影平面以彼此平行。 多个投影光线从假想平面投影到投影平面上。 在每个投影光线上设置像素值的采样点。 通过使用三维图像数据对采样点处的像素值进行内插。 当设置采样点时,投影光线上的这种内插像素值的最大值,积分值,标准偏差等投影在投影平面上,设定恒定采样周期,但是采样起始点通过使用 各投影光线的随机数。 通过该操作,所有投影光线上的采样点的相位被设定为彼此不同,从而防止在内插像素值周期性变化时发生的投射图像上的莫尔条纹。