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    • 5. 发明申请
    • APPARATUS, METHOD AND COMPUTER PROGRAM FOR PRODUCING A CORRECTED IMAGE OF A REGION OF INTEREST FROM ACQUIRED PROJECTION DATA
    • 用于生成来自获取的投影数据的利益区域的校正图像的装置,方法和计算机程序
    • WO2008084352A1
    • 2008-07-17
    • PCT/IB2007/055222
    • 2007-12-19
    • KONINKLIJKE PHILIPS ELECTRONICS N. V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHKOEHLER, Thomas
    • KOEHLER, Thomas
    • G06T11/00
    • G06T11/005A61B6/5258
    • PH006754 30 ABSTRACT: The present invention relates to an apparatus for producing a corrected image of a region of interest from acquired projection data (60), wherein an uncorrected intermediate image (74) is reconstructed. The uncorrected intermediate image (74) is corrected and image elements of the corrected intermediate image (85) are classified. Image elements of the corrected 5 intermediate image (85) that are of a high density or low density class are replaced by image elements having values depending on values of the low density class to generate a synthetic image (90). Synthetic projection data (96) are generated by forward projecting the synthetic image (90), and acquired projection data contributing to the high density class are replaced by corresponding synthetic projection data (96) to generate corrected projection data (112). 10 The corrected projection data (112) are used for reconstructing the corrected image.
    • PH006754 30摘要:本发明涉及一种用于从所获取的投影数据(60)产生感兴趣区域的校正图像的装置,其中重建未校正的中间图像(74)。 对未校正的中间图像(74)进行校正,并校正中间图像(85)的图像元素。 具有高密度或低密度等级的经校正的5中间图像(85)的图像元素由具有取决于低密度等级的值的值的图像元素代替以产生合成图像(90)。 合成投影数据(96)通过前向投影合成图像(90)产生,并且由相应的合成投影数据(96)代替有助于高密度等级的获取的投影数据以产生校正投影数据(112)。 校正投影数据(112)用于重建校正图像。