Method for faster ultrasound imaging

更快的超声成像方法

• 批准号: 7895321
• 负责人: Bruno Madore
• 金额: $ 26.7万
• 依托单位: BRIGHAM AND WOMEN'S HOSPITAL
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2012-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7895321
• 关键词: Ablation; Acceleration; Acoustics; Algorithms; Anatomy; Blood Vessels; Clinical; Communication; Data; Detection; Dimensions; Disease; Drops; Echocardiography; Elements; Evaluation; Excision; Eye; Focused Ultrasound Therapy; Frequencies; Human; Image; Imagery; Imaging Phantoms; Imaging technology; Individual; Lead; Length; Lesion; Liver; Liver neoplasms; Magnetic Resonance Imaging; Medical Imaging; Methods; Morphologic artifacts; Motion; Names; Needles; Noise; Output; Procedures; Process; Radiofrequency Interstitial Ablation; Radiology Specialty; Resolution; Respiration; Safety; Scanning; Scheme; Signal Transduction; Simulate; Speed; Staging; Technology; Testing; Three-Dimensional Imaging; Time; Tumor Tissue; Ultrasonography; Width; Wireless Technology; Work; base; cost; digital; image guided intervention; image guided therapy; imaging modality; improved; in vivo; interest; liver imaging; novel; prototype; public health relevance; reconstruction; time use; tumor; vascular bed; volunteer

DESCRIPTION (provided by applicant): Ultrasound imaging is a low-cost, safe and mobile imaging modality, which explains in part its widespread use in clinical Radiology. Although 2D anatomical ultrasound imaging appears very fast, generating images as fast as the eye can see them, frame rates can be severely degraded for more elaborate scans. During the resection and/or ablation of liver lesions, visualizing the tumor(s) in relation to the 3D vasculature in real- time would be highly desirable, increasing the odds of removing/ablating all tumor tissues while sparing important vessels. But the acquisition of large amounts of 3D information would normally degrade frame rates to levels unacceptable for image guidance. We propose a combination of spatial and temporal encoding schemes capable of accelerating by several-fold the acquisition rate of ultrasound images, allowing elaborate ultrasound images to be obtained at high frame rates. The anatomy of interest is probed in multiple directions at a time using multiple superposed beams, reducing imaging time by several-fold compared to conventional acquisitions where the object is probed in a single direction at a time. Based on the raw signal received from all overlapped beams, signals from individual beams can be recovered at the reconstruction stage using our proposed spatial and temporal algorithms. Preliminary results from simulated and experimental acoustic phantoms were obtained where imaging speed was increased by up to 32-fold. PUBLIC HEALTH RELEVANCE: Ultrasound imaging is a particularly widespread medical imaging modality, due in part to its safety and low cost. Because it is fast, generating images as fast as the human eye can see them, ultrasound imaging is often used to guide procedures, such as liver resections and tumor ablations. More elaborate ultrasound images, where tumor(s) could be seen in 3D in conjunction to the vascular bed, would be helpful toward safely removing all lesions and preserving important vessels but would lead to unacceptably low frame rates. The present project proposes an approach to speed-up by several-fold the image acquisition process in ultrasound imaging, enabling 3D and vascular information to be obtained with high frame rates. Preliminary results were obtained where imaging speed was increased by up to 32-fold.

描述（由申请人提供）：超声成像是一种低成本、安全和移动的成像模式，这部分解释了其在临床放射学中的广泛应用。虽然2D解剖超声成像看起来非常快，生成图像的速度与眼睛可以看到的速度一样快，但对于更精细的扫描，帧速率可能会严重降低。在肝脏病变的切除和/或消融期间，相对于3D脉管系统在真实的时间中可视化肿瘤将是高度期望的，这增加了移除/消融所有肿瘤组织同时保留重要血管的几率。但是，大量3D信息的采集通常会将帧速率降低到图像引导不可接受的水平。我们提出了一种空间和时间编码方案的组合，能够加速几倍的超声图像的采集速率，允许以高帧速率获得精心制作的超声图像。使用多个叠加射束在多个方向上同时探测感兴趣的解剖结构，与在单个方向上同时探测对象的常规采集相比，将成像时间缩短了数倍。基于从所有重叠波束接收的原始信号，可以使用我们提出的空间和时间算法在重建阶段恢复来自各个波束的信号。从模拟和实验声学幻影的初步结果得到的成像速度提高了32倍。 公共卫生相关性：超声成像是一种特别广泛的医学成像方式，部分原因是其安全性和低成本。因为它是快速的，生成图像的速度与人眼可以看到的速度一样快，所以超声成像通常用于指导手术，例如肝脏切除和肿瘤消融。更精细的超声图像，其中肿瘤可以在3D中与血管床一起看到，将有助于安全地去除所有病变并保留重要血管，但会导致不可接受的低帧率。本项目提出了一种方法，以加快几倍的图像采集过程中的超声成像，使3D和血管信息，以获得高帧速率。初步结果显示，成像速度提高了32倍。