三维快速自旋回波(SPACE)——序列原理及其应用
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国家重点基础研究发展计划(973)项目(2013CB733800/ 2013CB733803),深圳市重点实验室(ZYA200903260065A),国家自然科学基金(81071147),深圳市基础研究计划重点项目(JC201005270317A)

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3D Turbo-Spin-Echo Sequence with High Sampling Efficiency (SPACE) — Basic Principles and Its Applications
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    摘要:

    二维快速自旋回波(Two Dimensional Turbo Spin Echo,2D TSE)是目前临床应用十分广泛的一项成像技术。通 过与隔层扫描技术相结合,2D TSE 已在短时间内迅速应用于整个大脑的成像。由于射频能量吸收率(Specific Absorption Rate,SAR)以及 T2 衰减的影响,TSE 数据采集效率难以满足三维成像的要求。SPACE(Sampling Perfection with Application-optimized Contrasts by using different flip angle Evolutions)在 TSE 的基础上,采用非选择回聚脉冲和可变翻转 角,克服了 SAR 和 T2 衰减的影响,满足了临床对三维 TSE 的需求。文章将详细介绍 SPACE 的基本原理,分析成像参 数对图像质量的影响,并简单介绍 SPACE 在人体各个部位的临床应用及其前景展望。

    Abstract:

    Two dimensional turbo spin echo (2DTSE) has been the work-horse in routine MR examinations. With the combination of the slice interleaving, 2DTSE is applied to the whole brain imaging rapidly in a short time. Yet, the sampling efficiency of TSE is limited by high specific absorption rate (SAR) and strong T2 decay when it is used for 3D imaging where interleaving cannot be used. SPACE (Sampling Perfection with Application-optimized Contrasts by using different flip angle Evolutions) is a TSE variant that dramatically reduces the SAR and T2 blurring by using ultra-long echo train acquisition and non-spatially-selective refocusing RF-pulses with variable flip angles. In this paper, the basic principles of SPACE are introduced and its clinical applications are discussed.

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引文格式
张 磊,张 娜,刘 新,等.三维快速自旋回波(SPACE)——序列原理及其应用 [J].集成技术,2013,2(5):22-29

Citing format
ZHANG Lei, ZHANG Na, LIU Xin, et al.3D Turbo-Spin-Echo Sequence with High Sampling Efficiency (SPACE) — Basic Principles and Its Applications[J]. Journal of Integration Technology,2013,2(5):22-29

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  • 在线发布日期: 2013-10-28
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