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Evaluating the Differences Between 1D, 2D, and 3D Occupying Ratios in Reflecting the JOA Score in Cervical Ossification of the Posterior Longitudinal Ligament

Authors
 Seong Bae An  ;  Jong Joo Lee  ;  Tae Woo Kim  ;  Nam Lee  ;  Dong Ah Shin  ;  Seong Yi  ;  Keung Nyun Kim  ;  Do Heum Yoon  ;  Yoon Ha 
Citation
 QUANTITATIVE IMAGING IN MEDICINE AND SURGERY, Vol.9(6) : 952-959, 2019-06 
Journal Title
 QUANTITATIVE IMAGING IN MEDICINE AND SURGERY 
ISSN
 2223-4292 
Issue Date
2019-06
Keywords
Japanese Orthopedic Association score ; Ossification of the posterior longitudinal ligament (OPLL) ; location type ; occupying ratio ; three-dimensional measurement
Abstract
Background: To compare the differences between the one-dimensional (1D) length, two-dimensional (2D) area, and three-dimensional (3D) volume occupying ratios, and to assess the difference between the central and peripheral types of ossification of the posterior longitudinal ligament (OPLL). Methods: In total, 60 patients were included in this study, and 1D and 2D occupying ratios were obtained using Centricity PACS (GE Healthcare), while a 3D model was created using MIMICS® (Materialise, Leuven, Belgium). Clinical symptoms were measured preoperatively by the modified Japanese Orthopedic Association (JOA) score, short-form health survey (SF-36), and neck disability index. The increased signal intensity (ISI) in T2-weighted MRI was divided into three groups: grade 0, none; grade1, limited to one disc level; or grade2, beyond one disc level. The axial view of spinal canal in CT was vertically divided into three equal parts. Then, the OPLL was categorized by central and peripheral type according to the location of most protruded tip. Results: The 1D, 2D, and 3D occupying ratios had a significantly negative relationship with JOA score (r=-0.503; -0.506; -0.516, respectively). There was little difference in the JOA score between the central and peripheral types (17.15 vs. 17.12, P=0.785). The relationship with MR ISI, according to the central and peripheral type, showed no significant difference. In each multiple regression analysis, the 1D, 2D, and 3D occupying ratios were determined to have more influence on the JOA score (Beta: -0.364, -0.411, -0.462, respectively) than age, sex, most severe level, OPLL type, location type, and MR ISI. Conclusions: There was no difference between 1D, 2D, and 3D occupying ratios in reflecting the JOA score in cervical OPLL. Also, it is sufficient to reflect the occupying ratio in the clinical outcome without distinguishing between central and peripheral type.
DOI
10.21037/qims.2019.05.26
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Keung Nyun(김긍년)
Shin, Dong Ah(신동아) ORCID logo https://orcid.org/0000-0002-5225-4083
An, Seong Bae(안성배)
Yoon, Do Heum(윤도흠) ORCID logo https://orcid.org/0000-0003-1452-5724
Yi, Seong(이성)
Ha, Yoon(하윤)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/175890
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