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    • 5. 发明申请
    • METHOD AND SYSTEM FOR PARAMETER DETERMINATION FROM MEDICAL IMAGERY
    • 医学图像参数确定方法与系统
    • WO2012020211A1
    • 2012-02-16
    • PCT/GB2011/001155
    • 2011-07-29
    • KING'S COLLEGE LONDONSHAH, AjayPROTTI, Andrea
    • SHAH, AjayPROTTI, Andrea
    • G06T7/00
    • G06T7/62G06T7/11G06T7/174G06T7/187G06T2207/10088G06T2207/20101G06T2207/30048
    • Embodiments of the present invention provide an improved method to allow for volumes and other parameters relating to internal features and artefacts to be determined from medical imagery such as MRI images. In particular, within one embodiment of the invention a cluster-based segmentation algorithm is used that can allow voxels representing an internal feature which it is desired to measure to be segmented within multiple MRI images in parallel, and for measurements based on the segmentation thus obtained to be automatically generated. For example, in one embodiment left ventricle volume throughout the cardiac cycle can be determined by processing in parallel multiple MRI slices across multiple frames captured throughout the cycle, whereby cardiac measures such as ejection fraction, stroke volume, EDV, ESV and cardiac output may then be found quickly and easily. By determining the segmentation threshold for a single slice in advance of then applying the threshold across the whole image space, it can be certain that a threshold is used that takes into account the particular image data characteristics, such as contrast between and blood and muscle, and image brightness.
    • 本发明的实施例提供了一种改进的方法,以允许从诸如MRI图像的医学图像确定与内部特征和伪影有关的体积和其它参数。 特别地,在本发明的一个实施例中,使用基于簇的分割算法,其可以允许代表期望测量的内部特征的体素在多个MRI图像内并行分割,并且基于由此获得的分割进行测量 自动生成。 例如,在一个实施方案中,整个心动周期的左心室体积可以通过在整个循环中捕获的跨多个帧的并行多个MRI切片进行处理来确定,由此心脏测量例如射血分数,搏动体积,EDV,ESV和心输出量 快速轻松地找到。 通过在整个图像空间上施加阈值之前确定单个切片的分割阈值,可以确定使用考虑特定图像数据特征(例如血液和肌肉之间的对比度)的阈值, 和图像亮度。