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Comparison of blood flow imaging concepts with coherent and incoherent RF carriers in the 50 MHz region for application in dermatology

机译：比较50兆赫范围内相干和不相干射频载波的血流成像概念，用于皮肤病学

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摘要

Pulsed Wave Doppler (PWD) concepts can be classified with respect to the applied bandwidth (narrowband/wideband), the signal generation process (coherent/incoherent RF carrier) and the data acquisition scheme (I/Q/direct RF signal sampling). The different system concepts are discussed, resulting in a transition from frequency domain approaches for velocity estimation to time domain and combined time/frequency domain approaches. A high frequency imaging system (50 MHz range) for applications in dermatology was implemented. Different modalities for PWD processing are compared (color flow, power mode, duplex mode). Additionally, a pseudo-continuous wave Doppler (CWD) mode was implemented for sensitive lateral vessel topography imaging. Results from phantom measurements and from measurements in vivo are presented.
机译：可以根据施加的带宽（窄带/宽带），信号生成过程（相干/不相干RF载波）和数据采集方案（I / Q /直接RF信号采样）对脉冲波多普勒（PWD）概念进行分类。讨论了不同的系统概念，从而导致从用于速度估计的频域方法过渡到时域以及时/频域组合方法。实施了用于皮肤病学的高频成像系统（50 MHz范围）。比较了用于PWD处理的不同模式（颜色流，功率模式，双工模式）。此外，伪连续波多普勒（CWD）模式用于敏感的横向血管地形成像。呈现了幻像测量和体内测量的结果。

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