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.

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 目的： 由于金属植入物的存在而引起的巨大磁场失真在MR图像中引起严重的位移伪影，使得MR在需要诊断成像的患者群体中几乎无用。 该项目结合了许多技术，以使MRI在该患者人群。 研究方法： 我们结合了视角倾斜（VAT），现有的方法来纠正平面内的图像失真与切片编码技术，纠正通过平面失真。 该技术需要大约10-20分钟的扫描时间，我们目前正在努力使用并行成像和部分k空间采集来减少这一时间。 我们已经成功地测试了我们的技术在志愿者与金属膝盖和脊柱植入物。