基于平面标记磁共振图像的三维心肌应变无模型重建
Model-free reconstruction of three-dimensional myocardial strain from planar tagged MR images.
作者信息
Denney T S, McVeigh E R
机构信息
Electrical Engineering Department, Auburn University, AL 36849-5201, USA.
出版信息
J Magn Reson Imaging. 1997 Sep-Oct;7(5):799-810. doi: 10.1002/jmri.1880070506.
Abstract
A technique is presented for reconstructing a three-dimensional myocardial strain map from a set of parallel-tagged MR images. Radial strains were reconstructed from in vivo data from an anesthetized dog with values between .05 and .1 with a precision of +/- .003 for a tag detection accuracy of .1 mm and a tag spacing of 2.5 mm. The reconstruction spatial resolution was demonstrated by reconstructing a localized displacement abnormality. In the circumferential direction, the abnormality that resulted in 50% displacement attenuation had a full width at half maximum of 5.4 +/- .4 mm (mean +/- SD). Graphs are presented showing the relationship between the size of an abnormality and the ability of the method to reconstruct that abnormality. The combination of high resolution parallel-tagged MR images and the model-free, coordinate system-free strain reconstruction technique presented in this paper is capable of producing accurate, high resolution strain maps of the myocardium.
摘要
本文提出了一种从一组平行标记的磁共振（MR）图像重建三维心肌应变图的技术。从一只麻醉犬的体内数据重建了径向应变，其值在0.05至0.1之间，对于0.1毫米的标记检测精度和2.5毫米的标记间距，精度为±0.003。通过重建局部位移异常来证明重建空间分辨率。在圆周方向上，导致50%位移衰减的异常在半高宽处为5.4±0.4毫米（平均值±标准差）。文中给出了图表，显示了异常大小与该方法重建该异常能力之间的关系。本文提出的高分辨率平行标记MR图像与无模型、无坐标系的应变重建技术相结合，能够生成准确的高分辨率心肌应变图。
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