区域适应式零减法成像使用通用一致性因子用于一致的平面波组合
Yijun Xu1, Yaoting Yue2, Hao Wang1
1Academy for Engineering and Technology, Fudan University, Shanghai, China.
Ultrasonic imaging
|March 3, 2026
概括
区域适应式零减法成像 (raNSI) 通过调整直流偏移来增强超快超声图像. 这种新的方法可以提高对比度,分辨率和斑点质量,而不会损害图像完整性.
科学领域:
- 超声波成像 超声波成像
- 医疗成像医学成像
- 信号处理 信号处理
背景情况:
- 连贯平面波组合 (CPWC) 是超快超声波的标准,但由于不聚焦的光束,其图像质量受到限制.
- 零减去成像 (NSI) 提供了改进,但由于固定的直流偏移,在对比度,分辨率和斑点质量之间面临着权衡.
研究的目的:
- 引入区域适应式零减法成像 (raNSI),以克服NSI中固定偏移的局限性.
- 为了提高超快超声波成像中的图像对比度,分辨率和斑点质量.
主要方法:
- 使用修改后的通用连贯因子 (GCF) 来识别不同的图像区域.
- 应用了特定区域的DC偏移,并采用了基于社区统计的清洁 (NSBC) 来完善偏移选择.
- 使用模拟,实验幻影和体内数据集验证的raNSI.
主要成果:
- 与NSI相比,raNSI显著提高了57.94dB的对比率 (CR),0.19的斑点信号噪声比率 (sSNR),0.0327的对比噪声比率 (gCNR).
- 实现了6.9%的侧面分辨率增强,同时保留了斑点图案,由科尔莫戈罗夫-斯米尔诺夫测试证实.
- 证明了将所需的平面波数减少五倍的潜力.
结论:
- raNSI有效地平衡高分辨率和对比度,同时保持超快超声波中的斑点图案完整性.
- 拟议的方法与传统的NSI相比,提供了显著的进步,允许更高质量的成像,潜在的数据采集量更少.
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