A technical note on variable inter-frame interval as a cause of non-physiological experimental artefacts in ultrasound.
A technical note on variable inter-frame interval as a cause of non-physiological experimental artefacts in ultrasound.
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DOI：
10.1098/rsos.170245
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发表时间：
2017-05
影响因子：
3.5
通讯作者：
Harding PJ
中科院分区：
文献类型：
--
作者：
Miguez D;Hodson-Tole EF;Loram I;Harding PJ
超声（US）成像是一种公认的静态组织研究技术，但其适用于研究组织动力学取决于准确的帧时间信息，这可能并不总是提供给用户。在这里，我们提出的方法来量化帧间间隔（IFI）的变化，并评估不同的程序从两个US成像设备收集时间信息。受试器械表现出可变的IF，只能通过直接测量定时信号来确认，通过电信号（触发器）和/或用于US数据收集的软件中包含的时间信息来获得。使用单独的IFI值对图像序列内的动态变化进行逐帧插值测量，改善了骨骼肌运动和激活测量之间的同步;当正确实施时，验证US作为肌肉骨骼组织动力学研究的有价值技术。
Ultrasound (US) imaging is a well-recognized technique for the study of static tissues but its suitability for studying tissue dynamics depends upon accurate frame time information, which may not always be available to users. Here we present methods to quantify the inter-frame interval (IFI) variability, and evaluate different procedures for collecting temporal information from two US-imaging devices. The devices tested exhibited variable IFIs that could only be confirmed by direct measures of timing signals, available by means of electrical signals (triggers) and/or temporal information contained in the software used for the US data collection. Interpolating frame-by-frame measures of dynamic changes within image sequences using individual IFI values provided improved synchronization between measures of skeletal muscle movement and activation; validating US as a valuable technique for the study of musculoskeletal tissue dynamics, when correctly implemented.