MRI NEAR METALLIC IMPLANTS

金属植入物附近的 MRI

• 批准号: 7722886
• 负责人: WENXIAO LU
• 金额: $ 5.61万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-01 至 2009-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7722886
• 关键词: Computer Retrieval of Information on Scientific Projects Database; Diagnostic Imaging; Funding; Grant; Image; Implant; Institution; Knee; Magnetic Resonance Imaging; Methods; Morphologic artifacts; Patients; Population; Purpose; Research; Research Personnel; Resources; Scanning; Slice; Source; Techniques; Testing; Time; United States National Institutes of Health; Vertebral column; Work; magnetic field; time use; volunteer

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Purpose: Huge magnetic field distortions caused by the presence of metallic implants cause severe displacement artifacts in MR images, rendering MR almost useless in a patient population in need of diagnostic imaging. This project combines many techniques to enable MRI in this patient population. Methods: We have combined view-angle tilting (VAT), an existing method to correct in-plane image distortions with a slice-encoding technique that corrects the through-plane distortions. The technique demands scan times on the order of 10-20 minutes, and we are currently working to reduce this time using parallel imaging and partial k-space acquisitions. We have successfully tested our technique in volunteers with metallic knee and spine implants.

该副本是利用众多研究子项目之一 由NIH/NCRR资助的中心赠款提供的资源。子弹和 调查员（PI）可能已经从其他NIH来源获得了主要资金， 因此可以在其他清晰的条目中代表。列出的机构是 对于中心，这不一定是调查员的机构。 目的：由金属植入物的存在引起的巨大磁场扭曲会导致MR图像中的严重位移伪像，使MR在需要诊断成像的患者人群中几乎没有用。 该项目结合了许多技术以在该患者人群中启用MRI。 方法：我们已经结合了视角倾斜（增值税），这是一种使用切片编码技术纠正平面内图像扭曲的现有方法，该技术纠正了平面变形。 该技术需要在10-20分钟的时间内进行扫描时间，我们目前正在努力使用并行成像和部分K空间采集来减少这段时间。 我们已经成功地用金属膝盖和脊柱植入物在志愿者中测试了我们的技术。