Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089-2564, USA.
Magn Reson Med. 2011 May;65(5):1365-71. doi: 10.1002/mrm.22714. Epub 2010 Dec 16.
In speech production research using real-time magnetic resonance imaging (MRI), the analysis of articulatory dynamics is performed retrospectively. A flexible selection of temporal resolution is highly desirable because of natural variations in speech rate and variations in the speed of different articulators. The purpose of the study is to demonstrate a first application of golden-ratio spiral temporal view order to real-time speech MRI and investigate its performance by comparison with conventional bit-reversed temporal view order. Golden-ratio view order proved to be more effective at capturing the dynamics of rapid tongue tip motion. A method for automated blockwise selection of temporal resolution is presented that enables the synthesis of a single video from multiple temporal resolution videos and potentially facilitates subsequent vocal tract shape analysis.
在使用实时磁共振成像（MRI）的言语产生研究中，对发音动态的分析是回顾性进行的。由于言语速率的自然变化和不同发音器官的运动速度的变化，灵活选择时间分辨率是非常理想的。本研究的目的是展示黄金分割螺旋时间视图顺序在实时言语 MRI 中的首次应用，并通过与传统的位反向时间视图顺序进行比较来研究其性能。黄金分割视图顺序在捕捉舌尖快速运动的动态方面更有效。本文提出了一种自动分块选择时间分辨率的方法，该方法可以从多个时间分辨率视频中合成单个视频，并且可能有助于后续声道形状分析。
