F-k Domain Imaging for Synthetic Aperture Sequential Beamforming
文献类型：期刊论文
| 作者 | Vos, Hendrik J.; van Neer, Paul L. M. J.; Mota, Mariana Melo; Verweij, Martin D.; van der Steen, Antonius F. W.; Volker, Arno W. F. |
| 刊名 | IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
 |
| 出版日期 | 2016 |
| 英文摘要 | Spatial resolution in medical ultrasound images is a key component in image quality and an important factor for clinical diagnosis. In early systems, the lateral resolution was optimal in the focus but rapidly decreased outside the focal region. Improvements have been found in, e.g., dynamic-receivebeamforming, in which the entire image is focused in receive, but this requires complex processing of element data and is not applicable for mechanical scanning of single-element images. This paper exploits the concept of two-stage beamforming based on virtual source-receivers, which reduces the front-end computational load while maintaining a similar data rate and frame rate compared to dynamic-receive beamforming. We introduce frequency-wavenumber domain data processing to obtain fast second-stage data processing while having similarly high lateral resolution as dynamic-receivebeamforming and processing in time-space domain. The technique is very suitable in combination with emerging technologies such as application-specific integrated circuits (ASICs), hand-held devices, and wireless data transfer. The suggested method consists of three steps. In the first step, single-focused RF line data are shifted in time to relocate the focal point to a new origin t' = 0, z' = 0. This new origin is considered as an array of virtual source/receiver pairs, as has been suggested previously in literature. In the second step, the dataset is efficiently processed in the wavenumber-frequency domain to form an image that is in focus throughout its entire depth. In the third step, the data shift is undone to obtain a correct depth axis in the image. The method has been tested first with a single-element scanning system and second in a tissue-mimicking phantom using a linear array. In both setups, the method resulted in a -6-dB lateral point spread function (PSF) which was constant over the entire depth range, and similar to dynamic-receive beamforming and synthetic aperture sequential beamforming. The signal-to-noise ratio increased by 6 dB in both the near field and far field. These results show that the second-stage processing algorithm effectively produces a focused image over the entire depth range from a single-focused ultrasound field. |
| 收录类别 | SCI |
| 原文出处 | http://www.ncbi.nlm.nih.gov/pubmed/26571525 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/10448]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 作者单位 | IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL |
| 推荐引用方式 GB/T 7714 | Vos, Hendrik J.,van Neer, Paul L. M. J.,Mota, Mariana Melo,et al. F-k Domain Imaging for Synthetic Aperture Sequential Beamforming[J]. IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL,2016. |
| APA | Vos, Hendrik J.,van Neer, Paul L. M. J.,Mota, Mariana Melo,Verweij, Martin D.,van der Steen, Antonius F. W.,&Volker, Arno W. F..(2016).F-k Domain Imaging for Synthetic Aperture Sequential Beamforming.IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL. |
| MLA | Vos, Hendrik J.,et al."F-k Domain Imaging for Synthetic Aperture Sequential Beamforming".IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL (2016). |
入库方式： OAI收割
来源：深圳先进技术研究院
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