A Single-Scan T(2)* Mapping Method Based on Two Gradient-Echo Images with Compensation for Macroscopic Field Inhomogeneity
文献类型：期刊论文
| 作者 | Meng, Yuguang1,2; Lei, Hao1 |
| 刊名 | MAGNETIC RESONANCE IN MEDICINE
 |
| 出版日期 | 2008-12-01 |
| 卷号 | 60期号:6页码:1388-1395 |
| 关键词 | magnetic resonance imaging gradient echo susceptibility artifact T(2)* temporal resolution |
| 英文摘要 | T(2)*-weighted imaging (T(2)*WI) and quantitative T(2)* mapping with conventional gradient-echo acquisition are often hindered by severe signal loss induced by macroscopic field inhomogeneity. Various z-shimming approaches have been developed for T(2)*WI/T(2)* mapping in which the effects of macroscopic field inhomogeneity are suppressed while the sensitivity of T(2)*-related signal intensity to alterations in the microscopic susceptibility is maintained. However, this is often done at the cost of significantly increased imaging time. In this work, a fast T(2)* mapping method with compensation for macroscopic field inhomogeneity was developed. A proton density-weighted image and a composite T(2)*-weighted image, both of which were essentially free from macroscopic field inhomogeneity-induced signal loss, were used for the T(2)* calculation. The composite T(2)*-weighted image was reconstructed from a number of gradient-echo images acquired with successively incremented z-shimming compensation. Because acquisition of the two images and z-shimming compensation were realized in a single scan, the total acquisition time for obtaining a T(2)* map with the proposed method is the same as the time taken for a conventional multiecho gradient-echo imaging sequence without compensation. The performance and efficiency of the proposed method were demonstrated and evaluated at 4.7 T. Magn Reson Med 60:1388-1395, 2008. (C) 2008 Wiley-Liss, Inc. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Radiology, Nuclear Medicine & Medical Imaging |
| 研究领域[WOS] | Radiology, Nuclear Medicine & Medical Imaging |
| 关键词[WOS] | SUSCEPTIBILITY ARTIFACTS ; SIGNAL RECOVERY ; IRON ; BRAIN ; MRI ; REDUCTION ; FMRI ; REMOVAL ; B-0 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000261225100015 |
| 公开日期 | 2015-10-13 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8065]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Yuguang,Lei, Hao. A Single-Scan T(2)* Mapping Method Based on Two Gradient-Echo Images with Compensation for Macroscopic Field Inhomogeneity[J]. MAGNETIC RESONANCE IN MEDICINE,2008,60(6):1388-1395. |
| APA | Meng, Yuguang,&Lei, Hao.(2008).A Single-Scan T(2)* Mapping Method Based on Two Gradient-Echo Images with Compensation for Macroscopic Field Inhomogeneity.MAGNETIC RESONANCE IN MEDICINE,60(6),1388-1395. |
| MLA | Meng, Yuguang,et al."A Single-Scan T(2)* Mapping Method Based on Two Gradient-Echo Images with Compensation for Macroscopic Field Inhomogeneity".MAGNETIC RESONANCE IN MEDICINE 60.6(2008):1388-1395. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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