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Visual Enhancement of Interval Changes using a Temporal Subtraction Technique

机译:使用时间减法技术增强间隔变化的视觉效果

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Temporal subtraction is a visual enhancement technique to improve the detection of pathological changes from medical images acquired at different times. Prior to subtracting a previous image from a current image, a nonrigid warping of the two images might be necessary. As the nonrigid warping may change the size of pathological lesions, the subtraction image can be misleading. In this paper we present an alternative subtraction technique to avoid this problem. Instead of subtracting the intensities of corresponding voxels, a convolution filter is applied to both images prior to subtraction. The technique is demonstrated for computed tomography images of the lungs. It is shown that this method results in an improved visual enhancement of changing nodules compared with the conventional subtraction technique.
机译:时间减法是一种视觉增强技术,可以改善对不同时间获取的医学图像中病理变化的检测。在从当前图像减去先前图像之前,可能需要对两个图像进行非刚性扭曲。由于非刚性翘曲可能会改变病理病变的大小,因此减影可能会产生误导。在本文中,我们提出了另一种减法技术来避免此问题。代替减去相应体素的强度,在减去之前将卷积滤波器应用于两个图像。该技术可用于肺部计算机断层扫描图像。结果表明,与传统的减法技术相比,该方法可改善结节变化的视觉效果。

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