Pattynama P M, De Roos A, Van der Wall E E, Van Voorthuisen A E
Department of Radiology, University Hospital Leiden, The Netherlands.
Am Heart J. 1994 Sep;128(3):595-607. doi: 10.1016/0002-8703(94)90636-x.
A large body of evidence has accumulated to substantiate the accuracy of functional MR measurements of both ventricles. Because of good accuracy and superior reproducibility, MR imaging may be considered the gold standard for in vivo quantification of left and right ventricular ejection fraction, myocardial mass, and wall stress. New prospects for functional MR imaging include determination of the end-systolic volume-pressure relation as an index of myocardial contractility. The ability of MR imaging to detect wall motion disturbances may be enhanced further by combining myocardial tagging techniques with finite element analysis. Conventional MR imaging is limited by long examination times, but recent ultrafast modifications of echo-planar imaging allow completion of a functional heart study within seconds. Implementation of ultrafast MR imaging will greatly increase the usefulness of MR imaging for routine evaluation of cardiac function.
大量证据已积累起来，证实了对两个心室进行功能性磁共振测量的准确性。由于准确性高且重复性好，磁共振成像可被视为体内定量测量左、右心室射血分数、心肌质量和壁应力的金标准。功能性磁共振成像的新前景包括测定收缩末期容积-压力关系作为心肌收缩性的指标。通过将心肌标记技术与有限元分析相结合，磁共振成像检测壁运动障碍的能力可能会进一步提高。传统的磁共振成像受检查时间长的限制，但最近对回波平面成像的超快改进使得能够在数秒内完成一项心脏功能研究。超快磁共振成像的应用将大大提高磁共振成像在心脏功能常规评估中的实用性。
