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Kaburagi M, Maki F, Hino S, Nakano M, Yamaguchi T, Takasaki M, Iwamuro H, Iijima K, Sasanuma J, Watanabe K, Hasegawa Y, Yamano Y. Video Motion Analysis as a Quantitative Evaluation Tool for Essential Tremor during Magnetic Resonance-Guided Focused Ultrasound Thalamotomy. Neurol Int 2023; 15:1411-1422. [PMID: 38132970 PMCID: PMC10745303 DOI: 10.3390/neurolint15040091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
The Clinical Rating Scale for Tremor (CRST) is commonly used to evaluate essential tremor (ET) during focused ultrasound (FUS) thalamotomy. However, it faces challenges such as the ceiling effect and test-retest variability. This study explored the utility of videographic motion analysis as an evaluation index for ET. Forty-three patients with ET performed postural tremor and line-drawing tasks recorded on video, and the data were analyzed using motion analysis software. The test-retest and inter-rater reliability, correlations with the CRST and tremor scores, and pre/post-FUS treatment comparisons were analyzed. The video motion analysis showed excellent test-retest and inter-rater reliability. In the postural tremor tasks, video parameter amplitude significantly correlated with the CRST and tremor scores. Similarly, for the line-drawing task, video parameter amplitude showed significant correlations with CRST and tremor scores, effectively addressing the ceiling effect. Regarding post-FUS treatment improvements, changes in the CRST and tremor scores were significantly associated with changes in video parameter amplitude. In conclusion, quantitative analysis of the video motion of ET enables precise evaluation of kinematic characteristics and effectively resolves the ceiling effect and test-retest variability. The video motion analysis score accurately reflected the tremor severity and treatment effects, demonstrating its high clinical utility.
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Affiliation(s)
- Mayumi Kaburagi
- Department of Neurology, St. Marianna University School of Medicine, Kanagawa 216-8511, Japan; (M.K.); (F.M.); (Y.H.)
- Department of Neurology, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan
| | - Futaba Maki
- Department of Neurology, St. Marianna University School of Medicine, Kanagawa 216-8511, Japan; (M.K.); (F.M.); (Y.H.)
- Department of Neurology, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan
| | - Sakae Hino
- Department of Neurology, St. Marianna University School of Medicine, Kanagawa 216-8511, Japan; (M.K.); (F.M.); (Y.H.)
- Department of Neurology, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan
| | - Masayuki Nakano
- Department of Neurosurgery, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan; (M.N.)
| | - Toshio Yamaguchi
- Research Institute for Diagnostic Radiology, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan
- International Academia for Focused Ultrasound Therapy, Kanagawa 215-0023, Japan
| | - Masahito Takasaki
- Department of Anesthesiology, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan
| | - Hirokazu Iwamuro
- Department of Neurosurgery, Juntendo University, Tokyo 113-8421, Japan
| | - Ken Iijima
- Department of Diagnostic Radiology, Saitama Sekishinkai Hospital, Saitama 350-1305, Japan
| | - Jinichi Sasanuma
- Department of Neurosurgery, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan; (M.N.)
| | - Kazuo Watanabe
- Department of Neurosurgery, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan; (M.N.)
| | - Yasuhiro Hasegawa
- Department of Neurology, St. Marianna University School of Medicine, Kanagawa 216-8511, Japan; (M.K.); (F.M.); (Y.H.)
- Department of Neurology, Shin-Yurigaoka General Hospital, Kanagawa 215-0026, Japan
| | - Yoshihisa Yamano
- Department of Neurology, St. Marianna University School of Medicine, Kanagawa 216-8511, Japan; (M.K.); (F.M.); (Y.H.)
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