首页|环阵多阵元合成孔径成像F数优化研究

环阵多阵元合成孔径成像F数优化研究

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使用环形阵列的超声计算机断层扫描(USCT)在乳腺组织成像和工业无损检测方面展示了显著潜力,但图像重建质量仍面临挑战.该研究提出将F数应用于多阵元合成孔径聚焦成像方法,在环形阵列中实现对目标的自动扫查,并探讨F数对环形阵列合成孔径成像的影响.通过仿真和实验,使用乳腺仿真模型和直径 0.3 mm的尼龙丝作为测试对象,设置发射和接收F数为F、F/2、F/4、F/8、F/16进行图像重建,并进行阈值分割处理和半高宽(FWHM)分析.结果显示,较低接收F数能够显著减少靶标畸变并提高成像精度,其重建图像尺寸误差减少了28.3%.对于点目标,低接收F数显著提高了空间分辨率,其中轴向分辨率提升了 40%,横向分辨率提升了 36.7%.该研究为提升环形阵列USCT成像性能提供了新的思路和方法.
Optimization of F-number in synthetic aperture imaging with multi-element circular array
The use of circular array in ultrasonic computed tomography(USCT)has shown significant potential for imaging breast tissue and industrial nondestructive testing,but there are still challenges in image reconstruction quality.This study proposes applying the F-number in multi-element synthetic aperture focusing synthetic aperture focusing methods,enabling automatic scanning of targets with the ring array and exploring the impact of the F-number on ring array synthetic aperture imaging.Through simulations and experiments using a breast phantom model and 0.3 mm diameter nylon threads as test objects,image reconstruction was performed with transmit and receive F-numbers set to F、F/2、F/4、F/8、F/16 followed by automatic threshold segmentation and full width at half maximum(FWHM)analysis.The results show that a lower receive F-number significantly reduces target distortion and improves imaging accuracy,with a 28.3%reduction in reconstructed image size error.For point targets,a lower receive F-number significantly enhances spatial resolution,with axial resolution improved by 40%and lateral resolution by 36.7%.This study provides new insights and methods for improving the imaging performance of ring array USCT.

ultrasound computer tomography(USCT)imagingring arrayF-numbermulti-element synthetic aperture focusing(M-SAF)imagingautomatic scanningimaging performance

袁旭婷、王红亮、石丽帆、张文栋

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中北大学省部共建动态测试技术国家重点实验室,山西太原 030051

超声计算机断层扫描(USCT)成像 环形阵列 F数 多阵元合成孔径聚焦(M-SAF)成像 自动扫查 成像性能

国家自然科学基金国家重大科研仪器研制项目

61927807

2024

10.11857/j.issn.1674-5124.2024070031

中国测试
中国测试技术研究院

中国测试

CSTPCD北大核心
影响因子：0.446
ISSN：1674-5124
年,卷(期)：2024.50(9)
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