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使用图像质量指标优化综合医疗超声波ADC的设计

Nikola Radeljic-Jakic, Adriaan J Flikweert, Nuriel N M Rozsa

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

|June 6, 2025

概括

研究人员探索了用于便携式超声波设备的模拟数字转换器 (ADC) 的尺寸和功率的降低. 他们发现,连续近似寄存器 (SAR) ADC 中常见的非理想性对图像质量产生最小的影响,从而实现了实际的探针内数字化.

科学领域:

医疗成像医学成像
电气工程电气工程
信号处理信号处理

背景情况:

手持式和可穿戴式超声波设备需要低功耗,集成的RF数据处理系统.
模拟数字转换器 (ADC) 对于数字光束成形和图像重建至关重要,但目前对于便携式设备来说太耗电了.

研究的目的:

研究方法来减少连续近似注册 (SAR) ADC 的面积和功耗.
评估ADC非理想性对B模式和彩色多普勒超声波图像质量的影响.

主要方法:

一项蒙特卡洛模拟研究使用非理想的ADC模型将射频数据数字化.
四个SAR-ADC架构与五个不同的非理想性进行了测试.
用PSNR,SSIM和CNR指标重建和评估了B模式和彩色多普勒图像.

主要成果:

超声波成像,特别是B模式和彩色多普勒,证明了对ADC非理想性的固有弹性.
电容器不匹配被确定为一种非理想现象,对图像质量影响最小.
发现,放松的ADC要求对于实际的探头内数字化是可行的.

结论:

连续近似寄存器 (SAR) ADC的非理想性对超声波图像质量有有限的影响.
这种弹性允许为便携式超声系统设计较小,功率较低的ADC.
这些发现支持开发更实用的,集成的超声波设备,用于点的护理诊断.

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