Evaluation of COPD's diaphragm motion extracted from 4D-MRI

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

doi:10.1117/12.2081090

20 March 2015 Evaluation of COPD's diaphragm motion extracted from 4D-MRI

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

Author Affiliations +

Proceedings Volume 9413, Medical Imaging 2015: Image Processing; 94132R (2015) https://doi.org/10.1117/12.2081090
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

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.

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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, and Hideaki Haneishi "Evaluation of COPD's diaphragm motion extracted from 4D-MRI", Proc. SPIE 9413, Medical Imaging 2015: Image Processing, 94132R (20 March 2015); https://doi.org/10.1117/12.2081090

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