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    • 21. 发明授权
    • Method of and apparatus for correcting scattered X-rays for X-ray
computerized tomograph
    • 用于X射线计算机断层扫描仪校正散射X射线的方法和装置
    • US5615279A
    • 1997-03-25
    • US332090
    • 1994-11-01
    • Tomonori YoshiokaShinichi MigitaTetsuo Nakazawa
    • Tomonori YoshiokaShinichi MigitaTetsuo Nakazawa
    • G01N23/04A61B6/03G06T11/00G06K9/36
    • H01J35/14A61B6/583G06T11/005H01J2235/086
    • In a scattered X-ray correction method for an X-ray computerized tomograph, the quantity of X-rays passed through a phantom is measured to be converted into logarithms. Obtained from the logarithmic data is a scattered X-ray correction curve representing a relationship between the measured data in the logarithmic expression and an amount of scattered X-ray correction. For a subject, the quantity of X-rays penetrated therethrough is measured to be transformed into logarithms. From the measured data undergone the logarithmic conversion and the scattered X-ray correction curve, there is attained a scattered X-ray correction amount in a linear region which is the state before the logarithmic conversion. The measured data of the subject in the logarithmic expression is subjected to an inverse logarithmic conversion. From the obtained values, the scattered X-ray correction amount is subtracted such that the resultant values are again converted into logarithms, thereby producing a computerized tomogram from the logarithmic values.
    • 在X射线计算机断层摄影机的散射X射线校正方法中,测量通过体模X射线的量被转换成对数。 从对数数据获得的散射X射线校正曲线表示对数表达式中的测量数据与散射X射线校正量之间的关系。 对于受试者,穿过其中的X射线的量被测量以被转换成对数。 从经过对数转换和散射X射线校正曲线的测量数据,在对数转换之前的状态的线性区域中获得散射X射线校正量。 以对数表达式对象的测量数据进行逆对数转换。 从获得的值中减去散射X射线校正量,使得所得到的值再次转换成对数,从而从对数值产生计算机断层图像。
    • 26. 发明申请
    • IMAGE DIAGNOSTIC SUPPORT APPARATUS
    • 图像诊断支持设备
    • US20100189332A1
    • 2010-07-29
    • US12670604
    • 2008-07-23
    • Yoshihiro GotoTetsuo NakazawaTetsushi Honda
    • Yoshihiro GotoTetsuo NakazawaTetsushi Honda
    • G06K9/46
    • G06T7/0012G06T2207/10081G06T2207/30061
    • An image diagnostic support device, which is connected with image acquisition means to acquire a tomographic image including a lung region of an object to be examined and is provided with image display means to display the tomographic image acquired by the image acquisition means as an image, is comprised of measurement range setting means that sets up a measurement range to extract the chest wall from the image, chest wall extracting means that extracts the chest wall from the image in the set measurement range, thickened portion extracting means that extracts a thickened portion incidental to the chest wall in the measurement range, and thickened portion measuring means that measures the thickness of a thickened portion at each position in the measurement range.
    • 一种图像诊断支持装置,其与图像获取装置连接以获取包括待检查对象的肺区域的断层图像,并且设置有图像显示装置,以将图像获取装置获取的断层图像显示为图像, 包括测量范围设置装置,其设置测量范围以从图像中提取胸壁;胸壁提取装置,从设置的测量范围内的图像提取胸壁;加厚部分提取装置,其提取附加的加厚部分 在测量范围内到胸壁,以及加厚部测量装置,其测量测量范围中每个位置处的加厚部分的厚度。
    • 30. 发明授权
    • X-ray CT system
    • X光CT系统
    • US5987091A
    • 1999-11-16
    • US897530
    • 1997-07-21
    • Osamu MiyazakiShinichi MigitaTetsuo Nakazawa
    • Osamu MiyazakiShinichi MigitaTetsuo Nakazawa
    • A61B6/03G06T11/00
    • G06T11/005Y10S378/901
    • Projection data having a phase difference of 180.degree. from each other, which are obtained through a 1/4 offset detector, are arranged alternately to obtain projection data of the high resolution, and a CT image is reconstructed on the basis of the projection data of the high resolution. Opposition difference data showing the difference between the projection data having the phase difference of 180.degree. from each other and having a phase difference of 180.degree. from each other are alternately arranged to obtain the opposition difference data of the high resolution, and an opposition difference image is reconstructed on the basis of the opposition difference data of the high resolution. Then, distortion components showing the high-frequency component are extracted from the aforesaid opposition difference image, and the aforesaid reconstructed CT image is corrected by the thus extracted distortion components, so that motion artifacts contained in the original CT image can be reduced.
    • 通过+ E,fra 1/4 + EE偏移检测器获得的相位差为180度的投影数据交替排列以获得高分辨率的投影数据,并且在 高分辨率投影数据的基础。 交替地布置表示彼此具有180度的相位差并具有180度的相位差的投影数据之间的差异的反差差数据,以获得高分辨率的对数差分数据和对置差分图像 基于高分辨率的对数差分数据重建。 然后,从上述对立差分图像中提取示出高频分量的失真分量,并且通过这样提取的失真分量校正上述重建的CT图像,从而可以减少包含在原始CT图像中的运动伪影。