Ogawa K, Fujii H, Kitagawa Y, Kubo A
Department of Electronic Informatics, College of Engineering, Hosei University.
Kaku Igaku. 2001 Jul;38(4):317-23.
The paper proposes a new contrast enhancement method for sentinel lymph node imaging. The sentinel lymph node image acquired by a conventional gamma camera system has a wide dynamic range, so that the contrast of sentinel lymph nodes relatively decreases. The proposed method, which is named an annular background subtraction (ABS) method, first found the center of the distribution of activity. Then we calculated the mean value in each annular area centered at the injection point of radiopharmaceuticals with one pixel width. The original image was subtracted by the mean value at each annular area. The performance of the proposed method was confirmed by clinical data.
本文提出了一种用于前哨淋巴结成像的新型对比度增强方法。通过传统伽马相机系统获取的前哨淋巴结图像具有较宽的动态范围，使得前哨淋巴结的对比度相对降低。所提出的方法，称为环形背景减法（ABS）方法，首先找到活性分布的中心。然后我们计算以放射性药物注射点为中心、宽度为一个像素的每个环形区域内的平均值。原始图像减去每个环形区域的平均值。通过临床数据证实了所提方法的性能。
