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The accuracy of the swallowing kinematic analysis at various movement velocities of the hyoid and epiglottis.

Lee SH, Oh BM, Chun SM, Lee JC, Min Y, Bang SH, Kim HC, Han TR - Ann Rehabil Med (2013)

Bottom Line: The Pearson correlation coefficients between the measured and instrumental reference values were over 0.99 (p<0.001) for all of the analyses.Bland-Altman plots showed narrow ranges of the 95% confidence interval of agreement between the measured and reference values as follows: 0.14 to 0.94 mm for distances in a still image, -0.14 to 1.09 mm/s for linear velocities, and -1.02 to 3.81 degree/s for angular velocities.Our findings demonstrate that the distance and velocity measurements obtained by swallowing kinematic analysis are highly valid in a wide range of movement velocity.

View Article: PubMed Central - PubMed

Affiliation: Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.

ABSTRACT

Objective: To evaluate the accuracy of the swallowing kinematic analysis.

Methods: To evaluate the accuracy at various velocities of movement, we developed an instrumental model of linear and rotational movement, representing the physiologic movement of the hyoid and epiglottis, respectively. A still image of 8 objects was also used for measuring the length of the objects as a basic screening, and 18 movie files of the instrumental model, taken from videofluoroscopy with different velocities. The images and movie files were digitized and analyzed by an experienced examiner, who was blinded to the study.

Results: The Pearson correlation coefficients between the measured and instrumental reference values were over 0.99 (p<0.001) for all of the analyses. Bland-Altman plots showed narrow ranges of the 95% confidence interval of agreement between the measured and reference values as follows: 0.14 to 0.94 mm for distances in a still image, -0.14 to 1.09 mm/s for linear velocities, and -1.02 to 3.81 degree/s for angular velocities.

Conclusion: Our findings demonstrate that the distance and velocity measurements obtained by swallowing kinematic analysis are highly valid in a wide range of movement velocity.

No MeSH data available.


The whole process of the swallowing kinematic analysis.
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Figure 1: The whole process of the swallowing kinematic analysis.

Mentions: Images and movies were acquired from a mobile fluoroscopy system BV Pulsera (Philips, Amsterdam, Netherlands) and made into digital files using a digital computer frame grabber board Pegasus HD/SD Board (Grass Valley Inc., Honorine, France) and image processing software EDIUS 4.5 (Grass Valley Inc.). All files were recorded in a high resolution (1980×1080 pixels) format. As the actual vertical length of the covered area was about 80 mm, a minimum detectable displacement was around 0.07 mm/pixel (80 mm/1080 pixels). Because image acquisition rate was 30 frames per second, the minimum detectable velocity of a moving object was 2.1 mm/s with a frame by frame analysis. A rater with 2-year research experience of swallowing motion analysis, who was blinded to the study design and purpose, analyzed the movie clips. The points of interest in every frame of the movie clips were analyzed, using motion analysis software Ariel Performance Analysis System (Ariel Dynamics Inc., Trabuco Canyon, CA, USA). All the digitized data were then filtered with a quintic spline algorithm. The whole process is shown in Fig. 1.


The accuracy of the swallowing kinematic analysis at various movement velocities of the hyoid and epiglottis.

Lee SH, Oh BM, Chun SM, Lee JC, Min Y, Bang SH, Kim HC, Han TR - Ann Rehabil Med (2013)

The whole process of the swallowing kinematic analysis.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3713288&req=5

Figure 1: The whole process of the swallowing kinematic analysis.
Mentions: Images and movies were acquired from a mobile fluoroscopy system BV Pulsera (Philips, Amsterdam, Netherlands) and made into digital files using a digital computer frame grabber board Pegasus HD/SD Board (Grass Valley Inc., Honorine, France) and image processing software EDIUS 4.5 (Grass Valley Inc.). All files were recorded in a high resolution (1980×1080 pixels) format. As the actual vertical length of the covered area was about 80 mm, a minimum detectable displacement was around 0.07 mm/pixel (80 mm/1080 pixels). Because image acquisition rate was 30 frames per second, the minimum detectable velocity of a moving object was 2.1 mm/s with a frame by frame analysis. A rater with 2-year research experience of swallowing motion analysis, who was blinded to the study design and purpose, analyzed the movie clips. The points of interest in every frame of the movie clips were analyzed, using motion analysis software Ariel Performance Analysis System (Ariel Dynamics Inc., Trabuco Canyon, CA, USA). All the digitized data were then filtered with a quintic spline algorithm. The whole process is shown in Fig. 1.

Bottom Line: The Pearson correlation coefficients between the measured and instrumental reference values were over 0.99 (p<0.001) for all of the analyses.Bland-Altman plots showed narrow ranges of the 95% confidence interval of agreement between the measured and reference values as follows: 0.14 to 0.94 mm for distances in a still image, -0.14 to 1.09 mm/s for linear velocities, and -1.02 to 3.81 degree/s for angular velocities.Our findings demonstrate that the distance and velocity measurements obtained by swallowing kinematic analysis are highly valid in a wide range of movement velocity.

View Article: PubMed Central - PubMed

Affiliation: Department of Rehabilitation Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.

ABSTRACT

Objective: To evaluate the accuracy of the swallowing kinematic analysis.

Methods: To evaluate the accuracy at various velocities of movement, we developed an instrumental model of linear and rotational movement, representing the physiologic movement of the hyoid and epiglottis, respectively. A still image of 8 objects was also used for measuring the length of the objects as a basic screening, and 18 movie files of the instrumental model, taken from videofluoroscopy with different velocities. The images and movie files were digitized and analyzed by an experienced examiner, who was blinded to the study.

Results: The Pearson correlation coefficients between the measured and instrumental reference values were over 0.99 (p<0.001) for all of the analyses. Bland-Altman plots showed narrow ranges of the 95% confidence interval of agreement between the measured and reference values as follows: 0.14 to 0.94 mm for distances in a still image, -0.14 to 1.09 mm/s for linear velocities, and -1.02 to 3.81 degree/s for angular velocities.

Conclusion: Our findings demonstrate that the distance and velocity measurements obtained by swallowing kinematic analysis are highly valid in a wide range of movement velocity.

No MeSH data available.