Ramalho Miguel, Altun Ersan, Herédia Vasco, Zapparoli Mauricio, Semelka Richard
Department of Radiology, University of North Carolina at Chapel Hill, CB#7510, 101 Manning Drive, Chapel Hill, NC 27599-7510, USA.
Magn Reson Imaging Clin N Am. 2007 Aug;15(3):321-47, vi. doi: 10.1016/j.mric.2007.06.003.
This article focuses on technical challenges in transferring 1.5T liver protocols to 3T systems and the overall comparison of MR sequences, highlighting the advantages and disadvantages of imaging at the higher field strength. An important benefit is the capacity of acquiring high-quality, thin-section postgadolinium T1-weighted three-dimensional gradientecho sequences, most clinically relevant for the detection and characterization of small hypervascular malignant diseases. Further research and development is necessary to overcome disadvantages, such as with in- and out-of phase T1-weighted gradient-echo sequences, and to minimize artifacts that appear at 3T.
本文重点关注将1.5T肝脏检查方案转换至3T系统时的技术挑战以及磁共振序列的总体比较，突出了在更高场强下成像的优缺点。一个重要的优势是能够获取高质量的、薄层的钆增强后T1加权三维梯度回波序列，这对于检测和鉴别小的富血供恶性病变最为相关。有必要进行进一步的研发以克服缺点，比如同相位和反相位T1加权梯度回波序列的缺点，并尽量减少在3T时出现的伪影。
