Acquisition and reconstruction of undersampled radial data for myocardial perfusion magnetic resonance imaging.
Acquisition and reconstruction of undersampled radial data for myocardial perfusion magnetic resonance imaging.
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DOI：
10.1002/jmri.21585
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发表时间：
2009-02
影响因子：
4.4
通讯作者：
DiBella, Edward V. R.
中科院分区：
文献类型：
--
作者：
Adluru, Ganesh;McGann, Chris;Speier, Peter;Kholmovski, Eugene G.;Shaaban, Akrarn;DiBella, Edward V. R.
采用时空约束重建方法（STCR）重建欠采样径向数据，以改善心肌灌注MRI。STCR方法联合重建每个切片的所有时间帧。在7名受试者在休息的3 T扫描仪上，该方法进行了比较，以传统的（GRAPPA）笛卡尔的方法。与笛卡尔采集相比，获得了增加的切片覆盖。平均而言，对于径向采集，每次心跳获得10个切片（其中8个适合于视觉分析，剩余的2个切片理论上可用于定量目的），而对于常规笛卡尔采集获得4个切片。与使用笛卡尔欠采样和STCR不同，新方法对帧间运动具有鲁棒性。STCR生成的图像质量评级（1表示最佳，5表示最差）为1.7±0.5;笛卡尔图像评级为2.6±0.4（p=0.0006）。观察到STCR的SNR平均改善44%（±17%），CNR平均改善46%（±22%）。新的径向数据采集和重建方案的动态心肌灌注成像是一种有前途的方法，以获得显着更高的覆盖率和改善的信噪比。有必要在冠状动脉疾病患者的血管舒张期间进行进一步的测试。
To improve myocardial perfusion MRI by reconstructing undersampled radial data with a spatiotemporal constrained reconstruction method (STCR). The STCR method jointly reconstructs all of the time frames for each slice. In seven subjects at rest on a 3T scanner, the method was compared to a conventional(GRAPPA) Cartesian approach. Increased slice coverage was obtained as compared to the Cartesian acquisitions. On average, 10 slices were obtained per heartbeat for radial acquisitions (8 of which are suitable for visual analysis and the remaining 2 slices may in theory be used for quantitative purposes), while 4 slices were obtained for the conventional Cartesian acquisitions. The new method was robust to interframe motion, unlike using Cartesian undersampling and STCR. STCR produced images with an image quality rating (1 for best and 5 for worst) of 1.7±0.5; the Cartesian images were rated 2.6±0.4, (p=0.0006). A mean improvement of 44% (±17%) in SNR and 46% (±22%) in CNR was observed for STCR. The new radial data acquisition and reconstruction scheme for dynamic myocardial perfusion imaging is a promising approach to obtain significantly higher coverage and improved signal to noise ratios. Further testing during vasodilation in patients with coronary artery disease is warranted.
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影响因子：
3.3
作者：
Tsao, J;Boesiger, P;Pruessmann, KP
通讯作者：
Pruessmann, KP
影响因子：
3.3
作者：
Adluru, Ganesh;Awate, Suyash P.;DiBella, Edward V. R.
通讯作者：
DiBella, Edward V. R.
影响因子：
4
作者：
RUDIN, LI;OSHER, S;FATEMI, E
通讯作者：
FATEMI, E
影响因子：
3.3
作者：
Di Bella, EVR;Parker, DL;Sinusas, AJ
通讯作者：
Sinusas, AJ
影响因子：
2.5
作者：
Candès, EJ;Romberg, J;Tao, T
通讯作者：
Tao, T