A tissue-mimicking ultrasound test object using droplet vaporization to create point targets.
A tissue-mimicking ultrasound test object using droplet vaporization to create point targets.
复制标题
使用液滴汽化来创建点目标的模拟组织超声测试对象。
DOI：
10.1109/tuffc.2011.2045
复制
发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
Fowlkes JB
中科院分区：
文献类型：
--
作者：
Carneal CM;Kripfgans OD;Krücker J;Carson PL;Fowlkes JB
Ultrasound test objects containing reference point targets could be useful for evaluating ultrasound systems and phase aberration correction methods. Polyacrylamide gels containing albumin-stabilized droplets (3.6 µm mean diameter) of dodecafluoropentane (DDFP) are being developed for this purpose. Perturbation by ultrasound causes spontaneous vaporization of the superheated droplets to form gas bubbles, a process termed acoustic droplet vaporization (ADV). The resulting bubbles (20 to 160 µm diameter) are small compared with acoustic wavelengths in diagnostic ultrasound and are theoretically suitable for use as point targets (phase errors <20° for typical f-numbers). Bubbles distributed throughout the material are convenient for determining the point spread function in an imaging plane or volume. Cooling the gel causes condensation of the DDFP droplets, which may be useful for storage. Studying ADV in such viscoelastic media could provide insight into potential bioeffects from rapid bubble formation.
