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RISS 인기검색어
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- 저자 : Sho Furuya (검색결과 2 건)
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Highly Accurate Analysis of the Cervical Neural Tract of the Elderly Using ZOOM DTI
Sho Furuya,Motoyuki Iwasaki,Takumi Yokohama,Daisuke Ohura,Tomoyuki Okuaki 대한척추신경외과학회 2018 Neurospine Vol.15 No.2
Objective: To investigate the fractional anisotropy (FA) values of the cervical spinal cord in elderly individuals using zonally magnified oblique multislice (ZOOM) diffusion tensor imaging (DTI). Methods: Fourteen healthy elderly volunteers (group E) and 10 young volunteers (group Y) were enrolled. We assessed the FA, apparent diffusion coefficient (ADC), and λ1–λ3 values using 3-T magnetic resonance imaging. The region of interest was contoured entirely inside the spinal cord, with no gray/white matter distinction, in order to avoid including the cerebrospinal fluid. Results: As lower cervical levels were approached, the FA values gradually decreased, while the ADC values increased. The mean FA values at each cervical level were as follows in groups E and Y: 0.71 and 0.70 at the C2/3 level, 0.66 and 0.66 at the C3/4 level, 0.63 and 0.62 at the C4/5 level, 0.57 and 0.57 at the C5/6 level, and 0.58 and 0.57 at the C6/7 level, respectively. The mean ADC values in groups E and Y were 1.06 and 0.99 at the C2/3 level, 1.05 and 1.06 at the C3/4 level, 1.14 and 1.06 at the C4/5 level, 1.18 and 1.21 at the C5/6 level, and 1.39 and 1.46 at the C6/7 level, respectively. There were no significant differences between the elderly and young participants. Conclusion: In both asymptomatic elderly and young individuals, the FA values gradually decreased and the ADC values increased moving towards lower cervical levels. Age did not affect the FA values, even though mild cord compression was evident due to spondylotic changes. ZOOM DTI has the potential to provide more information than conventional DTI.
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Inoue Takaki,Maki Satoshi,Furuya Takeo,Okimatsu Sho,Yunde Atsushi,Miura Masataka,Shiratani Yuki,Nagashima Yuki,Maruyama Juntaro,Shiga Yasuhiro,Inage Kazuhide,Orita Sumihisa,Eguchi Yawara,Ohtori Seiji 대한척추외과학회 2023 Asian Spine Journal Vol.17 No.4
Study Design: Retrospective study.Purpose: To compare the radiographic risk factors for decreased cervical lordosis (CL) after laminoplasty, focusing on the difference between cervical spondylotic myelopathy (CSM) and cervical ossification of the posterior longitudinal ligament (C-OPLL).Overview of Literature: A few reports compared the risk factors for decreased CL between CSM and C-OPLL although these two pathologies have their characteristics.Methods: This study included 50 patients with CSM and 39 with C-OPLL who underwent multi-segment laminoplasty. Decreased CL was defined as the difference between preoperative and 2-year postoperative neutral C2–7 Cobb angles. Radiographic parameters included preoperative neutral C2–7 Cobb angles, C2–7 sagittal vertical axis (SVA), T1 slope (T1S), dynamic extension reserve (DER), and range of motion. The radiographic risk factors were investigated for decreased CL in CSM and C-OPLL. Additionally, the Japanese Orthopedic Association (JOA) score was assessed preoperatively and 2 years postoperatively.Results: C2–7 SVA (<i>p</i> =0.018) and DER (<i>p</i> =0.002) were significantly correlated with decreased CL in CSM, while C2–7 Cobb angle (<i>p</i> =0.012) and C2–7 SVA (<i>p</i> =0.028) were correlated with decreased CL in C-OPLL. Multiple linear regression analysis revealed that greater C2–7 SVA (<i>B</i> =0.22, <i>p</i> =0.026) and small DER (<i>B</i> =−0.53, <i>p</i> =0.002) were significantly associated with decreased CL in CSM. By contrast, greater C2–7 SVA (<i>B</i> =0.36, <i>p</i> =0.031) was significantly associated with decreased CL in C-OPLL. The JOA score significantly improved in both CSM and C-OPLL (<i>p</i> <0.001).Conclusions: C2–7 SVA was associated with a postoperative decreased CL in both CSM and C-OPLL, but DER was only associated with decreased CL in CSM. Risk factors for decreased CL slightly differed depending on the etiology of the condition.
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