Flexible reduced field of view magnetic resonance imaging based on single-shot spatiotemporally encoded technique

• 作者: 屈小波 李敬 蔡淑惠 蔡聪波 陈林 陈颖
• 来源期刊: 中国物理B（英文版）
• 关键词: magnetic resonance imaging spatiotemporal encoding single shot reduced field-of-view
• 年，卷（期）: 2015,（10）
• 页码范围: 108703-1-108703-9
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/10/108703

摘要

In many ultrafast imaging applications, the reduced field-of-view (rFOV) technique is often used to enhance the spatial resolution and field inhomogeneity immunity of the images. The stationary-phase characteristic of the spatiotemporally-encoded (SPEN) method offers an inherent applicability to rFOV imaging. In this study, a flexible rFOV imaging method is presented and the superiority of the SPEN approach in rFOV imaging is demonstrated. The proposed method is validated with phantom and in vivo rat experiments, including cardiac imaging and contrast-enhanced perfusion imaging. For com-parison, the echo planar imaging (EPI) experiments with orthogonal RF excitation are also performed. The results show that the signal-to-noise ratios of the images acquired by the proposed method can be higher than those obtained with the rFOV EPI. Moreover, the proposed method shows better performance in the cardiac imaging and perfusion imaging of rat kidney, and it can scan one or more regions of interest (ROIs) with high spatial resolution in a single shot. It might be a favorable solution to ultrafast imaging applications in cases with severe susceptibility heterogeneities, such as cardiac imaging and perfusion imaging. Furthermore, it might be promising in applications with separate ROIs, such as mammary and limb imaging.