[口头报告]Sound Speed Estimation for Reflection Imaging of Ultrasound Computed Tomography - 报告详情

Sound Speed Estimation for Reflection Imaging of Ultrasound Computed Tomography
编号:99 稿件编号:91 访问权限:仅限参会人 更新:2021-10-30 22:08:09 浏览:194次 口头报告

报告开始:2021年11月14日 20:00 (Asia/Shanghai)

报告时间:25min

所在会议:[PS1] Plenary Session 1 [CT1] Workshop on CT

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摘要
Ultrasound Computed Tomography (USCT) reflection imaging can provide information on the anatomical structure of the breast and assist the screening and early diagnosis of breast cancer. Because of the individual differences of the breasts, the USCT reflection image reconstruction may need different sound speeds. To address this problem, we propose a strategy to extract the average breast sound speeds of each slice through the USCT prescan process and then use them for the formal scan reconstruction. In the prescan process, the signals trasmit through the coupling agent only and the signal transmits through the coupling agent and the breast are selected first. Then the maximum value-based time of flight (TOF) extraction method is used to obtain the corresponding sound speeds, respectively. After that, the average sound speeds of the agent and the breasts can be calculated as the size of the coupling agent is known. Finally, the average breast sound speed of each slice is utilized for the formal scan reconstruction. Image clarity evaluation functions, such as Tenengrad gradient function, Brenner gradient function, and Discrete Cosine Transform (DCT) function are used to analyze the image reconstruction results of one slice from one dense breast and one fatty breast under the empirical sound speed(1540m/s) and the calculated sound speed. The calculated sound speeds of the fatty and dense breast were 1470m/s and 1516m/s, respectively. The normalized DCT values, Brenner and Tenengrad gradient values of the fatty and dense breast, which were reconstructed under the calculated sound speed were about 25%, 63%, 56% and 2%, 15%, 16% higher than the ones under the empirical sound speed.

 
关键字
USCT,prescan,sound speed estimation
报告人
Jiameng Wang
华中科技大学

稿件作者
Jiameng Wang 华中科技大学
Zhaohui Liu 华中科技大学
Yun Wu 华中科技大学
Qiude Zhang 华中科技大学
Junjie Song 华中科技大学
Liang Zhou 华中科技大学
Jupeng Ni Wuhan WeSee Medical Imaging Limited Company
Mingyue Ding 华中科技大学
Ming Yuchi 华中科技大学
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重要日期

摘要提交日期:

2021/08/31

2021/10/25

全文投稿日期:  

2021/09/15

2021/10/25

录取通知日期: 

2021/09/30

2021/11/01

会议日期:   2021-11-12-2021-11-14

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