A synthetic aperture ultrasonic imaging method: experiment
A synthetic aperture ultrasonic imaging method: experiment
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DOI：
10.1109/ultsym.1992.275882
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发表时间：
1992-10
期刊：
影响因子：
--
通讯作者：
J. Ylitalo;H. Ermert
中科院分区：
文献类型：
--
作者：
J. Ylitalo;H. Ermert
对一种基于合成孔径方法和全息术的超声成像方法进行了实验研究。对象数据记录使用3.5 MHz的多元素相控阵列与一个相当宽的角度光束。在微机上利用空间频域进行图像的数字重建，从而可以有效地使用FFT算法。对于实时扫描仪，可以使重建算法足够快。通过在水浴中成像细线来定义空间分辨率。在23-95 mm深度范围内，横向（-6-dB）分辨率约为1 mm。通过对标准组织体模成像，研究了动态范围和分辨率。该研究表明，如果在空间分辨率（波束宽度）和动态范围之间进行折衷，例如囊肿的可检测性将大大提高。
An ultrasonic imaging method based on a synthetic aperture approach and holography was evaluated experimentally. Object data were recorded using a 3.5-MHz multielement phased array with a fairly wide-angle beam. Images were reconstructed numerically in a microcomputer using the spatial frequency domain which allows an efficient use of FFT algorithms. The reconstruction algorithm can be made fast enough for a real-time scanner. The spatial resolution was defined by imaging thin wires in a water bath. The lateral (-6-dB) resolution was about 1 mm in the depth range of 23-95 mm. The dynamic range and resolution were studied by imaging a standard tissue phantom. The study shows that if a compromise is made between the spatial resolution (beamwidth) and the dynamic range, the detectability of cysts, for example, is greatly improved.>