Brain Research Imaging Center and Department of Radiology, The University of Chicago, Chicago, Illinois 60637, USA.
J Magn Reson Imaging. 2012 Nov;36(5):1241-7. doi: 10.1002/jmri.23720. Epub 2012 Jun 11.
To develop a technique that is able to reduce acquisition time and remove uneven blurring in reconstructed image for PROPELLER MRI. By using under-sampling and iterative reconstruction, this proposed technique will be less sensitive to subject motion.
Numerical simulations, as well as experiments on a phantom and healthy human subjects were performed to demonstrate advantages of a combination of under-sampled acquisition and iterative reconstruction. Method of motion correction was modified to increase accuracy of motion correction for the under-sampled PROPELLER acquisition.
It was demonstrated that the proposed approach achieved substantial acceleration of PROPELLER acquisition while maintaining its motion correction advantage.
An effective method for reducing imaging time in PROPELLER was introduced in this study, which minimizes typical under-sampling artifacts without uneven spatial resolution and maintains the ability of motion correction.
开发一种能够减少采集时间并消除重建图像中不均匀模糊的技术，用于 PROPELLER MRI。通过使用欠采样和迭代重建，该技术对受试者运动的敏感性将降低。
进行了数值模拟以及在体模和健康人体受试者上的实验，以证明欠采样采集和迭代重建相结合的优势。修改了运动校正方法，以提高欠采样 PROPELLER 采集的运动校正准确性。
结果表明，所提出的方法在保持运动校正优势的同时，实现了 PROPELLER 采集的大幅加速。
本研究介绍了一种在 PROPELLER 中减少成像时间的有效方法，该方法最大限度地减少了典型的欠采样伪影，同时保持了空间分辨率的均匀性，并保持了运动校正的能力。
