零减法成像与修改的延迟乘和和束成形相结合,用于连贯的平面波复合
Yijun Xu1, Yaoting Yue2, Hao Wang1
1Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China.
Medical & biological engineering & computing
|April 29, 2025
概括
一种新的超声波成像方法结合了零减去成像 (NSI) 和延迟乘和和 (DMAS) 束形. 这种方法可以提高图像分辨率和对比度,同时保持斑点质量,克服现有技术的局限性.
科学领域:
- 医疗成像医学成像
- 超声波技术 超声波技术 超声波技术
- 信号处理 信号处理
背景情况:
- 超快超声波成像中的连贯平面波复合提供了效率,但由于未聚焦的波浪,图像质量受到损害.
- 延迟复和和 (DMAS) 波束造型器提高图像质量,但可能导致过度压缩,对斑点质量产生负面影响.
- 现有的DMAS方法在图像对比度,分辨率和斑点保护之间存在权衡.
研究的目的:
- 开发一种新型的光束转换器,将零减法成像 (NSI) 与延迟乘和和 (DMAS) 集成在一起.
- 通过提高斑点质量而不牺牲分辨率和对比度来克服当前DMAS方法的局限性.
- 为了评估拟议的NSI-DMAS联合光束造型器的性能.
主要方法:
- 研究了一种结合NSI和DMAS的新型光束转换器.
- 在接收时使用NSI和延迟和总和 (DAS),在发送维度执行乘法和总和.
- 使用模拟,幻影和体内超声波数据集评估了该方法.
主要成果:
- 与NSI.37相比,拟议的方法显示了较好的对比率 (+10.02%),斑点信号与噪声比率 (+45.19%) 和通用对比与噪声比率 (+12.37%) 的改善.
- 在0.24mm的半最大 (分辨率) 上实现了全宽度的改进.
- 成功地平衡了斑点质量 (类似于DAS) 与高分辨率 (类似于NSI).
结论:
- 组合的NSI-DMAS光束制造器有效地提高了超声波图像的分辨率和对比度.
- 拟议的方法减轻了DMAS中常见的过度抑制问题,保持了斑点质量.
- 这种技术为超快超声波成像提供了优越的替代方案,提高了诊断准确度.
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