CONTRAST ENHANCED 4D PHASE CONTRAST IMAGING

对比增强 4D 相衬成像

• 批准号: 6123006
• 负责人: JILL O FREDRICKSON
• 金额: $ 0.07万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6123006
• 关键词: bioengineering /biomedical engineering; bioimaging /biomedical imaging; biomedical resource; magnetic resonance imaging; radiology; technology /technique

Introduction: Conventional MR imaging is not optimal for real-time interventional use. Changes in imaging parameters can take tens of seconds to be reflected in the images. Switching between pulse sequence types requires tens of seconds. The imaging plane cannot be easily modified during continuous scanning. 2DFT imaging is inherently limited in temporal resolution, and display lag prohibits continuous motion or repositioning of devices. The aims of real-time interactive MRI are to maximize temporal resolution, minimize display lag, and allow interactive control during continuous scanning. An interface such as this is the key to enabling the continuous repositioning of interventional devices as is possible with other guidance modalities. Methods/Results: We are collaborating with John Pauly and Adam Kerr in the department of Electrical Engineering to adapt their real-time reconstruction system which was developed for a standard whole body machine to our interventional system. We have investigated the use of circular EPI k-space trajectory for this purpose and have installed Quad Ross hypersparc processors on the sparc workstation. These processors improve our reconstruction and display rate dramatically. In contrast to fluoroscopic methods of evaluation, MR has no associated ionizing radiation and has the ability to acquire images in any plane. Conclusions: Real-time interactive MRI is a promising imaging method for interventional MRI. We are currently developing rapid imaging methods and will soon turn to a clinical evaluation of these methods.

简介：传统 MR 成像并不适合 实时介入使用。 成像参数的变化可能需要 几十秒的时间才能反映在图像中。 之间切换 脉冲序列类型需要数十秒。 成像平面 在连续扫描过程中不能轻易修改。 2DFT 成像是 时间分辨率本质上受到限制，并且显示滞后禁止 设备的连续运动或重新定位。 实时的目标 交互式 MRI 旨在最大化时间分辨率，最小化显示 滞后，并允许在连续扫描期间进行交互式控制。 一个 像这样的接口是实现连续性的关键 与其他设备一样重新定位介入设备 指导方式。 方法/结果：我们正在与约翰合作 电气工程系的 Pauly 和 Adam Kerr 适应他们的实时重建系统，该系统是为 我们的介入系统的标准全身机器。 我们有 研究了圆形 EPI k 空间轨迹的使用 目的并已在上安装了 Quad Ross hypersparc 处理器 sparc 工作站。 这些处理器改善了我们的重建和 显示率大幅提升。 与荧光透视方法相比 评估时，MR 没有相关的电离辐射，并且具有 能够在任何平面上获取图像。 结论：实时 交互式 MRI 是一种有前途的介入 MRI 成像方法。 我们目前正在开发快速成像方法，很快就会转向 对这些方法进行临床评价。