Markl Michael, Reeder Scott B, Chan Frandics P, Alley Marcus T, Herfkens Robert J, Pelc Norbert J
Department of Radiology, Stanford University, Lucas MRI/S Center, 1201 Welch Rd, Rm P 284, Palo Alto, CA 94304, USA.
Radiology. 2004 Mar;230(3):852-61. doi: 10.1148/radiol.2303030181.
Tagging with balanced steady-state free-precession (SSFP) magnetic resonance (MR) imaging by using a steady-state storage scheme for myocardial motion analysis was evaluated. Signal-to-noise ratio (SNR), blood-tissue contrast, and tag persistence in volunteers and phantoms showed improved performance of SSFP imaging with tagging compared with that of radiofrequency spoiled gradient-echo (SPGR) MR imaging with tagging. Choice of flip angle with SSFP imaging involved a trade-off among SNR, blood-tissue contrast, and tag persistence. Increased SNR and tag persistence can be achieved simultaneously with SSFP imaging compared with SPGR tagging methods. As a result, the proposed technique may be useful for analysis of diastolic ventricular function.
评估了通过使用用于心肌运动分析的稳态存储方案，利用平衡稳态自由进动（SSFP）磁共振（MR）成像进行标记的情况。与带有标记的射频扰相梯度回波（SPGR）MR成像相比，志愿者和体模中的信噪比（SNR）、血液-组织对比度和标记持久性显示出带有标记的SSFP成像具有更好的性能。SSFP成像中翻转角的选择涉及SNR、血液-组织对比度和标记持久性之间的权衡。与SPGR标记方法相比，SSFP成像可同时实现更高的SNR和标记持久性。因此，所提出的技术可能有助于舒张期心室功能的分析。
