{"title":"高对比度和分辨率三维超声成像与临床线性传感器阵列扫描在旋转平移几何","authors":"T. Lucas, I. Quidu, S. Bridal, J. Gateau","doi":"10.3390/app11020493","DOIUrl":null,"url":null,"abstract":"We propose a novel solution for volumetric ultrasound imaging using single-side access 3-D synthetic-aperture scanning of a clinical linear array. This solution is based on an advanced scanning geometry and a software-based ultrasound platform. The rotate-translate scanning scheme increases the elevation angular aperture by pivoting the array [-45{\\textdegree} to 45{\\textdegree}] around its array axis (axis along the row of its elements) and then, scans the imaged object for each pivoted angle by translating the array perpendicularly to the rotation axis. A theoretical basis is presented so that the angular and translational scan sampling periods can be best adjusted for any linear transducer array. We experimentally implemented scanning with a 5-MHz array. In vitro characterization was performed with phantoms designed to test resolution and contrast. Spatial resolution assessed based on the full-width half-maximum of images from isolated microspheres was increased by a factor 3 along the translational direction from a simple translation scan of the array. Moreover, the resolution is uniform over a cross-sectional area of 4.5 cm 2. Angular sampling periods were optimized and tapered to decrease the scan duration while maintaining image contrast (contrast at the center of a 5 mm cyst on the order of-26 dB for 4{\\textdegree} angular period and a scan duration of 10 s for a 9cm 3 volume). We demonstrate that superior 3-D US imaging can be obtained with a clinical array using our scanning strategy. This technique offers a promising and flexible alternative to development of costly matrix arrays toward the development of sensitive volumetric ultrasonography.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"15 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"High-Contrast and -Resolution 3-D Ultrasonography with a Clinical Linear Transducer Array Scanned in a Rotate-Translate Geometry\",\"authors\":\"T. Lucas, I. Quidu, S. Bridal, J. Gateau\",\"doi\":\"10.3390/app11020493\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We propose a novel solution for volumetric ultrasound imaging using single-side access 3-D synthetic-aperture scanning of a clinical linear array. This solution is based on an advanced scanning geometry and a software-based ultrasound platform. The rotate-translate scanning scheme increases the elevation angular aperture by pivoting the array [-45{\\\\textdegree} to 45{\\\\textdegree}] around its array axis (axis along the row of its elements) and then, scans the imaged object for each pivoted angle by translating the array perpendicularly to the rotation axis. A theoretical basis is presented so that the angular and translational scan sampling periods can be best adjusted for any linear transducer array. We experimentally implemented scanning with a 5-MHz array. In vitro characterization was performed with phantoms designed to test resolution and contrast. Spatial resolution assessed based on the full-width half-maximum of images from isolated microspheres was increased by a factor 3 along the translational direction from a simple translation scan of the array. Moreover, the resolution is uniform over a cross-sectional area of 4.5 cm 2. 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引用次数: 2
摘要
我们提出了一种新的解决方案,体积超声成像使用单侧访问三维合成孔径扫描临床线性阵列。该解决方案基于先进的扫描几何结构和基于软件的超声平台。旋转平移扫描方案通过将阵列[-45{\textdegree}到45{\textdegree}]围绕其阵列轴(沿其元素行轴)旋转来增加仰角孔径,然后通过垂直于旋转轴平移阵列来扫描成像对象的每个旋转角度。为任意线性换能器阵列的角度和平移扫描采样周期的最佳调整提供了理论基础。我们通过实验实现了5mhz阵列的扫描。体外表征采用设计用于测试分辨率和对比度的模型进行。基于隔离微球图像的全宽度半最大值评估的空间分辨率从阵列的简单平移扫描沿平移方向增加了3倍。此外,在4.5 cm 2的横截面积上,分辨率是均匀的。在保持图像对比度的同时,对角采样周期进行了优化和变细,以减少扫描时间(5 mm囊肿中心的对比度为-26 dB,角采样周期为4{\textdegree},扫描时间为10 s,体积为9cm 3)。我们证明,使用我们的扫描策略,临床阵列可以获得优越的3-D超声成像。该技术为灵敏体积超声的发展提供了一个有前途和灵活的替代方案,以发展昂贵的矩阵阵列。
High-Contrast and -Resolution 3-D Ultrasonography with a Clinical Linear Transducer Array Scanned in a Rotate-Translate Geometry
We propose a novel solution for volumetric ultrasound imaging using single-side access 3-D synthetic-aperture scanning of a clinical linear array. This solution is based on an advanced scanning geometry and a software-based ultrasound platform. The rotate-translate scanning scheme increases the elevation angular aperture by pivoting the array [-45{\textdegree} to 45{\textdegree}] around its array axis (axis along the row of its elements) and then, scans the imaged object for each pivoted angle by translating the array perpendicularly to the rotation axis. A theoretical basis is presented so that the angular and translational scan sampling periods can be best adjusted for any linear transducer array. We experimentally implemented scanning with a 5-MHz array. In vitro characterization was performed with phantoms designed to test resolution and contrast. Spatial resolution assessed based on the full-width half-maximum of images from isolated microspheres was increased by a factor 3 along the translational direction from a simple translation scan of the array. Moreover, the resolution is uniform over a cross-sectional area of 4.5 cm 2. Angular sampling periods were optimized and tapered to decrease the scan duration while maintaining image contrast (contrast at the center of a 5 mm cyst on the order of-26 dB for 4{\textdegree} angular period and a scan duration of 10 s for a 9cm 3 volume). We demonstrate that superior 3-D US imaging can be obtained with a clinical array using our scanning strategy. This technique offers a promising and flexible alternative to development of costly matrix arrays toward the development of sensitive volumetric ultrasonography.