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KMID : 1035420170050010075
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Journal of The Korean Society of Integrative Medicine
2017 Volume.5 No. 1 p.75 ~ p.83
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Development of an Automatic Measuring Program for the Pennation Angle Using Ultrasonography Image
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Kim Jong-Soon
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Abstract
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Purpose : The parameters used in architectural analysis are muscle thickness, fascicle length, pennation angle, etc. Pennation angle is an important muscle characteristic that plays a significant role in determining a fascicle’s force contribution to movement. Ultrasonography has been widely used to obtain the image for measurement of a pennation angle since it is non-invasive and real-time. However, manual assessment in ultrasonographic images is time-consuming and subjective, making it difficult for using in muscle function analysis. Thus, in this study, I proposed an automatic method to extract the pennation angle from the ultrasonographic images of gastrocnemius muscle.
Method : The ultrasonographic image obtained from 10 healthy participants’s gastrocnemius muscle using for developed automatic measuring program. Automatic measuring program algorithm consists with preprocessing, line detection, line classification, and angle calculation. The resulting image was then used to detect the fascicles and aponeuroses for calculating the pennation angle with the consideration of their distribution in ultrasonographic image.
Result : The proposed automatic measurement program showed the stable repeatability of pennation angle calculation.
Conclusion : This study demonstrated that the proposed method was able to automatically measure the pennation angle of gastrocnemius, which made it possible to easily and reliably investigate pennation angle more.
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KEYWORD
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automatic measuring program, pennation angle, ultrasonography
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