用磁场测量分析MAET中不同激发的脉冲压缩性能和图像质量指标,使用磁场测量
Mehmet Soner Gözü1, Nevzat Güneri Gençer1
1Electrical and Electronics Engineering Department, Middle East Technical University, Ankara, Türkiye.
International journal for numerical methods in biomedical engineering
|November 15, 2024
概括
脉冲压缩技术显著提高磁声电断层扫描 (MAET) 成像性能. 戈莱代码提供优越的对比度与噪声比率 (CNR) 和图像质量,改善了数字乳腺模型中的瘤检测.
科学领域:
- 生物医学成像技术 生物医学成像技术
- 医学物理 医学物理
- 断层扫描 (Tomography) 是一个专业的技术.
背景情况:
- 磁声电断层扫描 (MAET) 是一种新兴的成像方式.
- 提高信号与噪声比率 (SNR) 和对比与噪声比率 (CNR) 对MAET的性能至关重要.
- 脉冲压缩技术提供了信号增强的潜力.
研究的目的:
- 通过使用数值模拟来研究MAET中脉冲压缩技术的有效性.
- 为了比较线性频率调制 (LFM),巴克和戈莱代码激发的性能.
- 为了评估线圈配置对MAET成像的影响.
主要方法:
- 使用线性相阵 (LPA) 传感器和乳房模型进行MAET的数值模拟.
- 在数值乳腺模型中包括瘤点.
- 应用LFM,巴克尔和戈莱代码激发与添加式白高斯噪声.
- 对重建的B模式MAET图像的分析和SNR和CNR的定量评估.
主要成果:
- 与单周期激发相比,脉冲压缩显著提高了MAET图像质量.
- 戈莱代码激发产生了最高的CNR改进 (1.9dB) 和优越的图像质量.
- 巴克尔和戈莱代码提供了可比的SNR改进 (分别为8.36和8.44dB),表现优于LFM.
- 发现线圈配置显著影响瘤检测能力.
结论:
- 脉冲压缩技术,特别是戈莱代码,可以提高MAET的性能.
- 使用脉冲压缩的MAET可以在临床相关的深度检测小瘤 (5mm x 2mm).
- 优化的线圈配置对于使用MAET有效检测瘤至关重要.
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