Publications by authors named "Satoshi Maki"

Introduction: Surgical site infection (SSI) is one of the most serious postoperative complications following instrumented spinal surgery. We previously reported the potential of continuous local antibiotic perfusion (CLAP) to retain implants for patients with SSI following instrumented spinal surgery. We conducted a retrospective multicenter study to elucidate the efficacy and limitations of CLAP for patients with SSI following instrumented spinal surgery.

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【PURPOSE】: Diffusion Tensor Imaging (DTI) with tractography is useful for the functional diagnosis of degenerative lumbar disorders. However, it is not widely used in clinical settings due to time and health care provider costs, as it is performed manually on hospital workstations. The purpose of this study is to construct a system that extracts the lumbar nerve and generates tractography automatically using deep learning semantic segmentation.

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Article Synopsis
  • Hallux valgus (HV), or bunion deformity, is a common condition that affects the forefoot, and early diagnosis is crucial for improving quality of life.
  • A study developed a deep learning model that predicts radiographic measurements of HV using digital foot photographs and evaluates the severity of the deformity.
  • Results showed that the model could effectively estimate important radiographic angles, demonstrating substantial agreement with actual measurements, highlighting its potential for screening HV.
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Objective: This study aims to comprehend the natural history of adolescent idiopathic scoliosis (AIS) patients and determine risk factors for facet joint bridging in adolescent-onset adult idiopathic scoliosis with thoracolumbar/lumbar (TL/L) curves.

Methods: We included 50 patients with residual AIS with TL/L curves (3 males, 47 females; age 41.5 ± 17.

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  • The study is a retrospective cohort analysis that compares outcomes of intradiscal condoliase injection in patients with primary lumbar disc herniation (LDH) versus recurrent LDH.
  • A total of 249 patients were evaluated, with significant improvements in low back and leg pain for those with initial LDH, while improvements for recurrent cases were minimal and not statistically significant.
  • The findings suggest that while intradiscal condoliase is more effective for initial cases of LDH, it still offers benefits in leg pain relief and is considered a safe, minimally invasive treatment option.
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Study Design: A retrospective analysis.

Objective: This research sought to develop a predictive model for surgical outcomes in patients with cervical ossification of the posterior longitudinal ligament (OPLL) using deep learning and machine learning (ML) techniques.

Summary Of Background Data: Determining surgical outcomes assists surgeons in communicating prognosis to patients and setting their expectations.

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  • This study evaluates how integrating Retrieval Augmented Generation (RAG) with large language models (LLMs), like OpenAI's GPT-3.5, can improve the triage process in emergency medical care.
  • Researchers created 100 simulated emergency scenarios to test the triage accuracy of RAG-enhanced LLMs against emergency medical technicians (EMTs) and physicians, finding the LLMs achieved a 70% correct triage rate compared to 35% and 50%, respectively.
  • The results suggest that using RAG with LLMs can significantly reduce under-triage rates and improve the consistency of emergency medical assessments, indicating the need for further testing in real-life settings.
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Introduction: The short T1 inversion recovery (STIR) sequence is advantageous for visualizing ligamentous injuries, but the STIR sequence may be missing in some cases. The purpose of this study was to generate synthetic STIR images from MRI T2-weighted images (T2WI) of patients with cervical spine trauma using a generative adversarial network (GAN).  Methods: A total of 969 pairs of T2WI and STIR images were extracted from 79 patients with cervical spine trauma.

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  • The study evaluates a new imaging technique called MIXTURE, developed by Philips, which produces high-resolution T2 maps for diagnosing cervical radiculopathy.
  • It compares T2 relaxation times and their variability using MIXTURE with another method, SHINKEI-Quant (S-Q), in both healthy participants and a patient with cervical disc herniation.
  • Results show that MIXTURE provides significantly shorter T2 relaxation times and lower variability in measurements, indicating its potential for more accurate preoperative functional diagnosis of cervical nerve issues.
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Objective: Vertebral artery (VA) injury poses a significant risk in cervical spine surgery, necessitating accurate preoperative assessment. This study aims to introduce and validate a novel approach that combines the Fast field echo that resembles a computed tomography using restricted echo spacing (FRACTURE) sequence with Time of Flight (TOF) Magnetic Resonance Angiography (MRA) for comprehensive evaluation of VA courses in the cervical spine.

Materials And Methods: A total of eight healthy volunteers and two patients participated in this study.

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Spinal fixation surgery has been increasingly performed in patients with osteoporosis. Romosozumab, a drug that was introduced in Japan recently, is known to possibly promote bone healing. However, few studies have reported the therapeutic effects of romosozumab in clinical practice in Japan.

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  • The study aimed to compare patient outcomes using expandable versus static interbody spacers during oblique lateral interbody fusion (OLIF) surgery, utilizing CT and MRI imaging for evaluations.
  • A total of 35 patients with degenerative disc disease were analyzed, measuring factors like cage height, lordosis, pain levels, and radiologic changes both preoperatively and 6 months post-op.
  • Results indicated that expandable spacers provided better clinical outcomes, including less cage subsidence, improved dural sac area, better correction of vertebral slippage, and reduced leg numbness compared to static spacers.
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Study Design: Retrospective cohort study.

Objective: To develop a machine learning (ML) model that predicts the progression of AIS using minimal radiographs and simple questionnaires during the first visit.

Summary Of Background Data: Several factors are associated with angle progression in patients with AIS.

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Unlabelled: We developed a new model for predicting bone mineral density on chest radiographs and externally validated it using images captured at facilities other than the development environment. The model performed well and showed potential for clinical use.

Purpose: In this study, we performed external validation (EV) of a developed deep learning model for predicting bone mineral density (BMD) of femoral neck on chest radiographs to verify the usefulness of this model in clinical practice.

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Spinal injuries, including cervical and thoracolumbar fractures, continue to be a major public health concern. Recent advancements in machine learning and deep learning technologies offer exciting prospects for improving both diagnostic and prognostic approaches in spinal injury care. This narrative review systematically explores the practical utility of these computational methods, with a focus on their application in imaging techniques such as computed tomography (CT) and magnetic resonance imaging (MRI), as well as in structured clinical data.

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Background: The diagnosis of rotator cuff tears (RCTs) using radiographs alone is clinically challenging; thus, the utility of deep learning algorithms based on convolutional neural networks has been remarkable in the field of medical imaging recognition. We aimed to evaluate the diagnostic performance of artificial intelligence (a deep learning algorithm; a convolutional neural network) to detect and classify RCTs using shoulder radiographs, and compare its diagnostic performance with that of orthopedic surgeons.

Methods: A total of 1169 plain shoulder anteroposterior radiographs (1 image per shoulder) were included in the total dataset and divided into four groups: intact, small, medium, and large to massive tear groups.

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Introduction: Cervical spondylodiscitis due to osteoradionecrosis (ORN) after head-and-neck cancer radiotherapy is a severe complication. However, there are few reports on the surgical treatment of this condition.

Case Report: We report two cases of cervical spondylodiscitis due to ORN, which were successfully treated with posterior decompression and fusion.

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Study Design: Cross-sectional study.

Purpose: This cross-sectional study aimed to investigate the risk factors for osteoporosis in men by assessing bone mineral density (BMD), skeletal muscle mass, body fat mass, grip strength, and advanced glycation end products (AGEs).

Overview Of Literature: Fewer studies have reported the correlation between BMD and skeletal muscle mass in women.

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Accurately predicting functional outcomes in patients with spinal cord injury (SCI) helps clinicians set realistic functional recovery goals and improve the home environment after discharge. The present study aimed to develop and validate machine learning (ML) models to predict functional outcomes in patients with SCI and deploy the models within a web application. The study included data from the Japan Association of Rehabilitation Database from January 1, 1991, to December 31, 2015.

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Intradural extramedullary tuberculomas are a rare manifestation of tuberculosis that can lead to neurological deficits. We present a case of a 26-year-old male from Myanmar with lower limb weakness and gait disturbance, who was diagnosed with tuberculosis and found to have an intradural extramedullary lesion in the thoracic spine. Prompt surgical intervention was performed to address the lesion located at the T2-4 level.

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Article Synopsis
  • This study investigates how different combinations of materials affect bone union in rats, particularly focusing on platelet-rich plasma (PRP) and demineralized bone matrix (DBM).
  • Four groups of rats were tested: a control group, one with DBM only, another with DBM plus PRP, and a final group with DBM, PRP, and bone marrow fluid.
  • Results showed that the combination of DBM, PRP, and bone marrow fluid led to the highest rates of bone union and strength over time compared to the other groups, indicating these materials work well together for promoting bone healing.
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Ossification of the posterior longitudinal ligament of the thoracic spine (T-OPLL) causes symptoms including leg and back pain, and motor and sensory deficits. This study retrospectively reviewed 32 patients who initially underwent posterior decompression with instrumented fusion (PDF) for T-OPLL between 2001 and 2012, with 20 qualifying for the final analysis after applying exclusion criteria. Exclusions included unknown preoperative neurological findings, follow-up less than 10 years, or prior spinal surgeries at other levels.

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  • Advances in cancer treatment have improved life expectancy, but it is crucial for patients to maintain their daily activities for better quality of life, especially those with motor function issues.
  • A study compared muscle mass between 61 malignant tumor patients and 315 healthy individuals, analyzing factors like body mass index and skeletal muscle mass through bioimpedance analysis.
  • Results showed that while overall skeletal muscle mass index was similar in both groups, female malignant tumor patients had significantly lower trunk muscle mass compared to healthy females, indicating possible motor function impairment despite their maintained performance status.
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Introduction: This study aims to investigate risk factors for cage subsidence following minimally invasive lateral corpectomy for osteoporotic vertebral fractures.

Methods: Eight males and 13 females (77.2±6.

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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.

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