Ultrashort TE spectroscopic imaging (UTESI) using complex highly-constrained backprojection with local reconstruction (HYPR LR).

Ultrashort TE spectroscopic imaging (UTESI) using complex highly-constrained backprojection with local reconstruction (HYPR LR).
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使用复杂的高度约束反投影和局部重建 (HYPR LR) 的超短 TE 光谱成像 (UTESI)。

DOI:
10.1002/mrm.21986
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发表时间:
2009
影响因子:
3.3
通讯作者:
Mistretta,Charles
Mistretta,Charles
中科院分区:
医学3区
文献类型:
--
作者:
Wang,Kang;Du,Jiang;O'Halloran,Rafael;Fain,Sean;Kecskemeti,Steven;Wieben,Oliver;Johnson,KevinM;Mistretta,Charles

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最近,高度约束反投影(HYPR)和HYPR局部重建(HYPR LR)方法已被引入,以从一系列高度欠采样数据中重建震级图像,同时在具有时空相关性的应用中保持高空间和时间分辨率以及高信噪比(SNR)。然而,这些传统的HYPR算法仅限于产生的幅度图像,因此,在其潜在的应用有局限性。在这项工作中,HYPR LR算法已被修改,以扩展使用的算法在HYPR家庭的应用程序,需要处理复杂的数据,如MR化学位移成像(CSI)或光谱成像。所提出的方法以与原始HYPR LR处理相同的方式处理幅度信息。此外,它通过减去合成的合成图像的相位图来改善相位图像。该算法的可行性和有效性已在临床3T扫描仪上的皮质骨、跟腱和健康志愿者的CSI上得到证实。Magn Reson Med,2009年。© 2009 Wiley‐利斯公司
Recently, the highly‐constrained backprojection (HYPR) and HYPR with local reconstruction (HYPR LR) methods have been introduced to reconstruct magnitude images from a series of highly undersampled data while preserving high spatial and temporal resolution and high signal‐to‐noise ratio (SNR) in applications with spatiotemporal correlations. However, these conventional HYPR algorithms are limited to the generation of magnitude images and, therefore, have limitations in their potential applications. In this work, the HYPR LR algorithm has been modified to extend the use of algorithms in the HYPR family to applications that require processing of complex data, such as MR chemical shift imaging (CSI) or spectroscopic imaging. The proposed method processes the magnitude information the same way as in original HYPR LR processing. In addition, it improves the phase images by subtracting the phase map of a synthesized composite image. The feasibility and efficiency of this algorithm has been demonstrated on CSI of cortical bone, Achilles tendon, and a healthy volunteer on a clinical 3T scanner. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.
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