Image quality, tissue heating, and frame rate trade-offs in acoustic radiation force impulse imaging.
Image quality, tissue heating, and frame rate trade-offs in acoustic radiation force impulse imaging.
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DOI：
10.1109/tuffc.2009.1006
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发表时间：
2009-01
期刊：
影响因子：
--
通讯作者：
Trahey GE
中科院分区：
文献类型：
--
作者：
Bouchard RR;Dahl JJ;Hsu SJ;Palmeri ML;Trahey GE
声辐射力脉冲（ARFI）成像的实时应用需要单个ARFI图像的短采集时间和这些帧的重复采集。然而，由于产生可观的辐射力所需的脉冲能量很高，重复采集可能导致换能器表面和组织大量发热。我们描述和评估几种新的波束排序方案，沿着与并行接收采集，旨在减少采集时间和加热。这些技术减少了生成图像所需的辐射力脉冲的总数，并使连续脉冲之间的时间最小化。我们提出了定性和定量分析的权衡图像质量的采集方案。结果表明，这些技术产生了显着的改善帧速率，只有适度降低图像质量。通过有限元法建模和热电偶测量评估这些方案导致的组织和换能器面加热。结果表明，加热问题可以减轻采用ARFI采集序列，利用最高的轨道-激励比可能。
The real-time application of acoustic radiation force impulse (ARFI) imaging requires both short acquisition times for a single ARFI image and repeated acquisition of these frames. Due to the high energy of pulses required to generate appreciable radiation force, however, repeated acquisitions could result in substantial transducer face and tissue heating. We describe and evaluate several novel beam sequencing schemes which, along with parallel-receive acquisition, are designed to reduce acquisition time and heating. These techniques reduce the total number of radiation force impulses needed to generate an image and minimize the time between successive impulses. We present qualitative and quantitative analyses of the trade-offs in image quality resulting from the acquisition schemes. Results indicate that these techniques yield a significant improvement in frame rate with only moderate decreases in image quality. Tissue and transducer face heating resulting from these schemes is assessed through finite element method modeling and thermocouple measurements. Results indicate that heating issues can be mitigated by employing ARFI acquisition sequences that utilize the highest track-to-excitation ratio possible.