Masashi Matsuzaka

ORCID: 0000-0002-8199-3037
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About
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Research Areas
  • Exercise and Physiological Responses
  • Helicobacter pylori-related gastroenterology studies
  • Colorectal Cancer Screening and Detection
  • Gastric Cancer Management and Outcomes
  • Cardiovascular and exercise physiology
  • Radiomics and Machine Learning in Medical Imaging
  • High Altitude and Hypoxia
  • Pancreatic and Hepatic Oncology Research
  • Sports Performance and Training
  • Gastroesophageal reflux and treatments
  • Global Cancer Incidence and Screening
  • Glioma Diagnosis and Treatment
  • Cancer Diagnosis and Treatment
  • AI in cancer detection
  • Bone health and treatments
  • Thermoregulation and physiological responses
  • Eosinophilic Esophagitis
  • Cardiovascular Health and Disease Prevention
  • Bone health and osteoporosis research
  • CNS Lymphoma Diagnosis and Treatment
  • Diet and metabolism studies
  • Liver Disease Diagnosis and Treatment
  • Suicide and Self-Harm Studies
  • Obesity, Physical Activity, Diet
  • Pelvic floor disorders treatments

Hirosaki University Hospital
2015-2024

Sendai Medical Center
2023

Hirosaki University
2008-2021

Institute for Medical Informatics and Biostatistics
2017

Society of Thoracic Surgeons
2015

Taipei Medical University
1999

Although we usually report 5‐year cancer survival using population‐based registry data, nowadays many patients survive longer and need to be followed‐up for more than 5 years. Long‐term figures are scarce in Japan. Here 10‐year conditional an established statistical approach. We received data on 1 387 489 cases from six prefectural registries Japan, diagnosed between 1993 2009 at least estimated the relative of who were 2002 2006 period analysis. Using this survival, also calculated...

10.1111/cas.12525 article EN cc-by-nc Cancer Science 2014-09-02

To examine an association between self-reported sleep quality determined by Pittsburgh index (PSQI) and metabolic syndrome. This study was designed as cross-sectional study. Participants were 1481 adults aged 20 years above from general population (549 males 932 females). We assessed the global PSQI. PSQI consists of 7 elements, i.e. subjective quality, latency (prolonged onset time), duration, habitual efficiency (proportion hours slept to spent in bed), disturbance (interruption sleep),...

10.1186/1471-2458-14-562 article EN cc-by BMC Public Health 2014-06-05

Radiographic findings may provide clues to the underlying cause of neck symptoms. However, these associations remain controversial. This study investigates association between roentgenographic cervical spine and symptoms in a Japanese community population.A total 762 volunteers participated this study. Sagittal radiographs were taken questionnaire about presence visual analog scale (VAS) for pain or stiff shoulder was completed. The sagittal alignment (C2-C7) degenerative index measured from...

10.1007/s00776-014-0549-8 article EN cc-by Journal of Orthopaedic Science 2014-02-25

Preoperatively accurate evaluation of risk for early postoperative recurrence contributes to maximizing the therapeutic success intrahepatic cholangiocarcinoma (iCCA) patients. This study aimed investigate potential deep learning (DL) algorithms predicting through use preoperative images. We collected dataset, including plain computed tomography (CT) images, from 41 patients undergoing curative surgery iCCA at multiple institutions. built a CT patch-based predictive model using residual...

10.1038/s41598-022-12604-8 article EN cc-by Scientific Reports 2022-05-19

Abstract To clarify the physical and mental fatigue caused by intense exercise relationship between two types of fatigue, we examined changes in anthropometric biochemical variables, neutrophil function, Profile Mood States (POMS) questionnaire 13 female university judoists attending a one-week training camp. Blood glucose, total cholesterol, haemoglobin, leukocyte count, IgG, phagocytic activity all decreased after camp compared with baseline (P ≤ 0.046). Aspartate aminotransferase, lactate...

10.1080/02640410801885917 article EN Journal of Sports Sciences 2008-05-12

The purpose of this study was to assess middle-aged Japanese workers for possible gender differences in the risk factors associated with depressive symptoms and suicidal ideation. 5,878 (40–60 yr age) (3,631 males 2,247 females) were recruited from randomly selected companies northern Japan. Demographic lifestyle factors, ideation rate, data Brief Job Stress Questionnaire (BJSQ) Center Epidemiologic Studies Depression scale (CES-D) obtained self-report questionnaires. After adjusting...

10.2486/indhealth.ms1354 article EN Industrial Health 2012-12-25

Capsule endoscopy has been widely used as a non-invasive diagnostic tool for small or large intestinal lesions. In recent years, automated lesion detection systems using machine learning have devised. This study aimed to develop an system capsule endoscopic severity in patients with ulcerative colitis along the entire length of colon ResNet50. videos from were collected prospectively. Each single examination video file was partitioned into four segments: cecum and ascending colon, transverse...

10.1371/journal.pone.0269728 article EN cc-by PLoS ONE 2022-06-10

Objective: Athletes undergoing weight reduction are recognised as being more prone to infection. Few studies exist for athletes on the reduction-mediated changes in neutrophil function and related activities such reactive oxygen species (ROS) production capability, phagocytic activity (PA) serum opsonic (SOA). Methods: 16 Japanese female university judoists were examined early morning of first day (pre-values) last (post-values) a 20-day pre-competition training period. Of subjects, 8 needed...

10.1136/bjsm.2006.032029 article EN British Journal of Sports Medicine 2007-01-15

Abstract The present study examined the effects of judo training on neutrophil and related functions. We measured studied changes in its functions 22 male university judoists immediately before (Pre values) after (Post a 2 h session: reactive oxygen species (ROS) production capability, phagocytic activities (PA) serum opsonic activity (SOA). Neutrophil count whole blood, myogenic enzymes (creatine kinase, lactate dehydrogenase, aspartate aminotransferase alanine aminotransferase),...

10.1002/bio.1016 article EN Luminescence 2008-01-01

Serum antibody to Helicobacter pylori is tested in mass screening for gastric cancer along with the level of serum pepsinogens (PG) I and II. Recently, stool antigen tests have been developed as a new non-invasive test. We examined H. infection by both serology test survey compared results estimate applicability survey.A total 994 healthy adults who received April 2005 were tested. There 379 men 615 women, mean age was 57.7 years old. Stool samples used measure pylori-specific enzyme...

10.1111/j.1523-5378.2009.00672.x article EN Helicobacter 2009-03-11

Vascular factors have been implicated in the development of cognitive decline and dementia. The purpose this study is to determine association Ankle Brachial pressure Index (ABI) brachial-ankle Pulse Wave Velocity (ba-PWV) impairment a community-dwelling population. ABI ba-PWV were measured using volume-plethymographic apparatus 388 subjects aged 60 years old over. Mini-Mental State Examination was also employed measure global status. effectiveness as putative markers determined by multiple...

10.1186/1471-244x-10-46 article EN cc-by BMC Psychiatry 2010-06-10

ABSTRACT We assessed the association of neutrophil function with glycated hemoglobin (HbA1c) levels in a Japanese general population. Participants were 809 males and females who over 20 years old living Iwaki region Aomori Prefecture located northern Japan. Lifestyle parameters (smoking, alcohol consumption, exercise habits), HbA1c such as reactive oxygen species (ROS) production capability phagocytic activity (PA) measured. ROS was measured before after stimulus to obtain basal stimulated...

10.1002/bio.2495 article EN Luminescence 2013-03-19

Recently, a relationship between obesity and schizophrenia has been reported. Although fat- mass fat free have shown to be more predictive of health risk than body index, there are limited findings about composition among patients suffering from schizophrenia. The aim this study is compare the with that healthy subjects in Japan.We recruited (n = 204), aged 41.3 ± 13.8 (mean SD) years old DSM-IV diagnosis who were admitted psychiatric hospital using cross-sectional design. Subjects'...

10.1186/1744-859x-11-11 article EN cc-by Annals of General Psychiatry 2012-01-01

Abstract Background The differential diagnosis between gallbladder cancer (GBC) and xanthogranulomatous cholecystitis (XGC) remains quite challenging, can possibly lead to improper surgery. This study aimed distinguish XGC GBC by combining computed tomography (CT) images deep learning (DL) maximize the therapeutic success of Methods We collected a dataset, including preoperative CT images, from 28 cases 21 patients undergoing surgery at our facility. It was subdivided into training...

10.1002/ags3.12589 article EN cc-by-nc-nd Annals of Gastroenterological Surgery 2022-06-11

Objectives: To clarify the effects of high-intensity and high-frequency long-term/chronic training on neutrophil function serum levels myogenic enzymes in male university judoists. Methods: The subjects were 24 judoists who had stopped judo for 6 months then restarted their training. following parameters examined before after a 2 h unified exercise loading (UEL) at beginning quotidian (pre-training) months, 4 thereafter: enzymes, leucocyte counts, phagocytic activity (PA) oxidative burst as...

10.1136/bjsm.2007.032011 article EN British Journal of Sports Medicine 2008-04-01
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