MOTION OPPONENCY IN HUMAN VISUAL CORTEX

在过去的一年里，工作的重点是一些快速成像 身体成像的应用。一直以来，人们强烈强调 所谓全面心脏检查的改进。磁性 磁共振成像有可能提供关于 这是其他任何考试都无法比拟的。心脏的最新检查 疾病通常需要多项测试，其中一些是侵入性的。 这些检查包括超声心动图、冠状动脉造影术和 放射性核素成像，有无应力。为了让核磁共振成像 提供全面的心脏检查，它必须能够 表征心肌功能和心肌灌注，并确定 冠状动脉疾病。在过去，磁共振技术是可用的。 对于这些任务中的每一个，但通常不是以他们可以 所有的表演都要一次按顺序进行。FAST的最新进展 成像以及这些功能与新技术的结合 血管内造影剂允许所有的元素 全面的心脏检查，以满足这一要求。心肌 血流灌注是在首次通过的多层螺旋研究中获得的， 通过心肌的对比度可以显示减少的区域 心肌灌注。在平衡状态下，这些血管内对比 代理允许使用快速3D电影图像来评估整个心脏 应重视心肌功能和运动的评估 大约3-5分钟。因为这是血管内的性质 造影剂中，相对对比度在 允许冠状动脉成像的合理时间段 以高对比度进行表演。我们的工作将继续进行下去 扫描仪性能改进的优势，以及 造影剂提供独特的无创数据 心血管系统。

Work has focused during the past year on a number of fast imaging applications for body imaging. There has been a strong emphasis on the improvement of the so-called comprehensive cardiac exam. Magnetic resonance imaging has the potential of providing information about the heart unparalleled by any other exam. Current workups for cardiac disease usually require multiple tests, some of which are invasive. These tests include echocardiography, coronary angiography and radionuclide imaging, with and without stress. In order for MRI to provide the comprehensive cardiac exam, it must be able to characterize myocardial function and myocardial perfusion and identify coronary artery diseases. In the past, MR techniques were available for each of these tasks, but usually not in a fashion that they could all be performed in sequence at one sitting. Recent advances in fast imaging and the coupling of these capabilities with new novel intravascular contrast agents has allowed all of the elements for the comprehensive cardiac exam to meet this requirement. Myocardial perfusion is obtained in a first pass multi-slice study where transit of contrast through the myocardium can visualize areas of decreased myocardial perfusion. At equilibrium, these intravascular contrast agents allow fast 3D cine images to evaluate the entire heart with attention to myocardial function and motion to be evaluated in approximately 3-5 min. Because of the intravascular nature of this contrast agent, the relative contrast remains constant over a reasonable period of time allowing coronary artery imaging to be performed with high contrast. Our work will continue to take advantage of the improvements in scanner performance coupled with contrast agents to provide unique non-invasive data about the cardiovascular system.