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Proceedings Paper

Evaluation of COPD's diaphragm motion extracted from 4D-MRI
Author(s): Windra Swastika; Yoshitada Masuda; Naoko Kawata; Koji Matsumoto; Toshio Suzuki; Ken Iesato; Yuji Tada M.D.; Toshihiko Sugiura M.D.; Nobuhiro Tanabe; Koichiro Tatsumi M.D.; Takashi Ohnishi; Hideaki Haneishi
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Paper Abstract

We have developed a method called intersection profile method to construct a 4D-MRI (3D+time) from time-series of 2D-MRI. The basic idea is to find the best matching of the intersection profile from the time series of 2D-MRI in sagittal plane (navigator slice) and time series of 2D-MRI in coronal plane (data slice). In this study, we use 4D-MRI to semiautomatically extract the right diaphragm motion of 16 subjects (8 healthy subjects and 8 COPD patients). The diaphragm motion is then evaluated quantitatively by calculating the displacement of each subjects and normalized it. We also generate phase-length map to view and locate paradoxical motion of the COPD patients. The quantitative results of the normalized displacement shows that COPD patients tend to have smaller displacement compared to healthy subjects. The average normalized displacement of total 8 COPD patients is 9.4mm and the average of normalized displacement of 8 healthy volunteers is 15.3mm. The generated phase-length maps show that not all of the COPD patients have paradoxical motion, however if it has paradoxical motion, the phase-length map is able to locate where does it occur.

Paper Details

Date Published: 20 March 2015
PDF: 10 pages
Proc. SPIE 9413, Medical Imaging 2015: Image Processing, 94132R (20 March 2015); doi: 10.1117/12.2081090
Show Author Affiliations
Windra Swastika, Chiba Univ. (Japan)
Yoshitada Masuda, Chiba Univ. Hospital (Japan)
Naoko Kawata, Chiba Univ. Hospital (Japan)
Koji Matsumoto, Chiba Univ. Hospital (Japan)
Toshio Suzuki, Chiba Univ. Hospital (Japan)
Ken Iesato, Chiba Univ. Hospital (Japan)
Yuji Tada M.D., Chiba Univ. Hospital (Japan)
Toshihiko Sugiura M.D., Chiba Univ. Hospital (Japan)
Nobuhiro Tanabe, Chiba Univ. Hospital (Japan)
Koichiro Tatsumi M.D., Chiba Univ. Hospital (Japan)
Takashi Ohnishi, Chiba Univ. (Japan)
Hideaki Haneishi, Chiba Univ. (Japan)

Published in SPIE Proceedings Vol. 9413:
Medical Imaging 2015: Image Processing
Sébastien Ourselin; Martin A. Styner, Editor(s)

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