New real-time strain imaging concepts using diagnostic ultrasound
New real-time strain imaging concepts using diagnostic ultrasound
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DOI：
10.1088/0031-9155/45/6/302
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发表时间：
2000-06-01
影响因子：
3.5
通讯作者：
Ermert, H
中科院分区：
文献类型：
--
作者：
Pesavento, A;Lorenz, A;Ermert, H
提出了两种实时应变成像的概念和系统。这两个系统都是基于一个传统的超声扫描仪，连接到一个PC与A/D转换卡的实时数据采集的射频数据。连续采集的射频帧之间的差分应变估计使用相位根搜索。第一个概念使用手动弹性成像的特殊实时实现。在第二个概念中，表示为“振动记录法”，静态压缩被探头的低频轴向振动取代，仍然以准静态采集模式运行。这两个概念的属性进行了讨论，关于噪声和运动伪影，它示出，使用模拟和幻影实验，这两种成像概念产生相同种类的应变图像。振动成像的优点在于，不必施加手动压缩，总压缩可以非常低，并且一些运动伪影被更好地抑制。
Two real-time strain imaging concepts and systems are presented. Both systems are based on a conventional ultrasound scanner that is connected to a PC with an A/D converter card for real-time data acquisition of rf data. Differential strain between successively acquired rf frames are estimated using phase root seeking. The first concept uses a special real-time implementation of manual elastography. In the second concept, denoted 'vibrography', the static compression is replaced by low-frequency axial vibration of the probe, still operating in quasistatic acquisition mode. The properties of both concepts are discussed with regard to noise and motion artefacts, and it is shown, using simulations and phantom experiments, that both imaging concepts yield the same kind of strain images. Vibrography has the advantage that no manual compression has to be applied, total compression can be very low and some motion artefacts are better suppressed.