Evaluating the differences between 1D, 2D, and 3D occupying ratios in reflecting the JOA score in cervical ossification of the posterior longitudinal ligament

Seong Bae An, Jong Joo Lee, Tae Woo Kim, Nam Lee, DongAh Shin, Seong Yi, Keung Nyun Kim, Do Heum Yoon, Yoon Ha

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)952-959
Number of pages8
JournalQuantitative Imaging in Medicine and Surgery
Volume9
Issue number6
DOIs
Publication statusPublished - 2019 Jan 1

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Ossification of Posterior Longitudinal Ligament
Orthopedics
Spinal Canal
Belgium
Health Surveys
Neck
Regression Analysis
Delivery of Health Care

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

Cite this

@article{1d946ea9f3564a048f4aa2b0dcc166f9,
title = "Evaluating the differences between 1D, 2D, and 3D occupying ratios in reflecting the JOA score in cervical ossification of the posterior longitudinal ligament",
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{\circledR} (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.",
author = "An, {Seong Bae} and Lee, {Jong Joo} and Kim, {Tae Woo} and Nam Lee and DongAh Shin and Seong Yi and Kim, {Keung Nyun} and Yoon, {Do Heum} and Yoon Ha",
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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. / An, Seong Bae; Lee, Jong Joo; Kim, Tae Woo; Lee, Nam; Shin, DongAh; Yi, Seong; Kim, Keung Nyun; Yoon, Do Heum; Ha, Yoon.

In: Quantitative Imaging in Medicine and Surgery, Vol. 9, No. 6, 01.01.2019, p. 952-959.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Evaluating the differences between 1D, 2D, and 3D occupying ratios in reflecting the JOA score in cervical ossification of the posterior longitudinal ligament

AU - An, Seong Bae

AU - Lee, Jong Joo

AU - Kim, Tae Woo

AU - Lee, Nam

AU - Shin, DongAh

AU - Yi, Seong

AU - Kim, Keung Nyun

AU - Yoon, Do Heum

AU - Ha, Yoon

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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.

AB - 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.

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