Discrete and Computational Geometry and Graphs
18th Japan Conference, JCDCGG 2015, Kyoto, Japan, September 14-16, 2015, Revised Selected Papers
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Article
Role of growth plate (apophyseal ring fracture) in causing modic type changes in pediatric low back pain patients
We investigated the prevalence of Modic changes (MCs) and associated pathologies in pediatric patients.
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Chapter
Standard Procedure of the Transforaminal Approach and How to Perform Local Anesthesia (Inside-Out Method)
The standard procedure of the transforaminal approach (inside-out method) and how to perform local anesthesia are presented in this chapter. Currently, several additional techniques such as “foraminoplasty” ha...
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Article
Open AccessEffect of using different approximation models to the exact Mohr–Coulomb material model in the FE simulation of Anchor Foundations in sand
Singularities in the Mohr–Coulomb (MC) yield criterion create numerical difficulties when implemented in the finite element model (FEM). In this research, a two-dimensional (2D) and a three-dimensional (3D) el...
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Article
Twenty Years of Progress of \(\hbox {JCDCG}^3\)
The conferences in the series of the Japan Conference on Discrete and Computational Geometry, Graphs and Games (\(\hbox {JCDCG}^3\)JCDCG3) have been held annually since 1997, except for 2008. Since 1997, almost o...
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Chapter
Spondylolysis and Spondylolisthesis in Athletes
Lumbar spondylolysis is the most common pathology identified in adolescents with chronic back pain. A key component to the diagnosis and treatment of lumbar spondylolysis in our practice relies on CT stage cla...
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Article
On Almost Empty Monochromatic Triangles and Convex Quadrilaterals in Colored Point Sets
Let S be a set of N points on the plane in general position, colored arbitrarily with c colors (\(c\in {\mathbb {N}}\)c∈N). A subset of points is said to be monochromatic if all its points have the same color. In...
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Article
Transforaminal full-endoscopic lumbar discectomy under local anesthesia in awake and aware conditions: the inside-out and outside-in techniques
Transforaminal full-endoscopic lumbar discectomy (TELD) under local anesthesia was first introduced in Japan in 2003. Initially referred to as percutaneous endoscopic discectomy, in 2018, a consensus was reach...
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Article
Identification of abnormalities in the lumbar nerve tract using diffusion-weighted magnetic resonance neurography
Abnormalities of the lumbar nerve tract caused by congenital variations or high nerve root take-off angles are difficult to visualize. Diffusion-weighted magnetic resonance neurography (DW-MRN) has recently be...
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Article
Study of lesions of the lumbar endplate based on the stage of maturation of the lumbar vertebral body: the relationship between skeletal maturity and chronological age
The lesion of the lumbar endplate is sometimes identified in the vertebrae of children and adolescents. The purpose of this study is to compare between skeletal maturity and chronological age. The second purpo...
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Article
Answer to the Letter to the Editor of C. Birkenmaier concerning “Rehydration of a degenerated disc on MRI synchronized with transition of Modic changes following stand-alone XLIF” by K. Kita, T. Sakai, M. Abe, Y. Takata and K. Sairyo (Eur Spine J; 2017). doi:10.1007/s00586-017-4945-6
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Article
Diffusion tensor imaging and tractography of the sciatic nerve: assessment of fractional anisotropy and apparent diffusion coefficient values relative to the piriformis muscle, a preliminary study
Piriformis muscle syndrome (PMS) is underdiagnosed. To evaluate the potential of diffusion tensor imaging and diffusion tensor tractography as innovative tools for the diagnosis of PMS by functional assessment...
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Article
Rehydration of a degenerated disc on MRI synchronized with transition of Modic changes following stand-alone XLIF
Lumbar intervertebral disc degeneration (LDD) is known to be associated with low back pain (LBP) and leads to degenerative lumbar disease. LDD is consi...
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Chapter and Conference Paper
Searching for a Non-adversarial, Uncooperative Agent on a Cycle
Assume k robots are placed on a cycle–the perimeter of a unit (radius) disk–at a position of our choosing and can move on the cycle with maximum speed 1. A non-adversarial, uncooperative agent, called bus, is mov...
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Article
Variations in arterial supply to the lower lumbar spine
Several papers examined the vascular anatomy of the lumbosacral region using cadavers with angiography. However, few reports used CT angiography, and discussion on variations of fourth lumbar, fifth lumbar, an...
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Article
Clinical features of patients with pars defects identified in adulthood
Lumbar spondylolysis is considered a stress fracture of the pars interarticularis that occurs during growth. However, it is sometimes insidious and identified in adults as pseudoarthrosis, the terminal-stage of s...
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Article
Characteristics of lumbar spondylolysis in elementary school age children
Lumbar spondylolysis, a stress fracture of the pars interarticularis in the lumbar spine, is often precipitated by trauma, but there may be a congenital predisposition to this condition. There have been few st...
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Book and Conference Proceedings
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Chapter and Conference Paper
Erratum to: Discrete and Computational Geometry and Graphs
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Article
Blocking the \(k\) -Holes of Point Sets in the Plane
Let \(P\) P be ...
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Article
Open AccessConsecutive assessment of FA and ADC values of normal lumbar nerve roots from the junction of the dura mater
Diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) are widely used in the evaluation of the central nervous system and recently have been reported as a potential tool for diagnosis of the peri...
