Keiji Matsunaga

ORCID: 0000-0003-3611-1143
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About
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Research Areas
  • Cardiac Imaging and Diagnostics
  • Advanced MRI Techniques and Applications
  • Lipoproteins and Cardiovascular Health
  • Liver Disease Diagnosis and Treatment
  • Gastroesophageal reflux and treatments
  • MRI in cancer diagnosis
  • Eosinophilic Esophagitis
  • Liver Disease and Transplantation
  • Hepatocellular Carcinoma Treatment and Prognosis
  • Cancer, Lipids, and Metabolism
  • Helicobacter pylori-related gastroenterology studies
  • Medical Imaging Techniques and Applications
  • Atrial Fibrillation Management and Outcomes
  • Radiomics and Machine Learning in Medical Imaging
  • Atomic and Subatomic Physics Research
  • Pancreatitis Pathology and Treatment
  • Muscle activation and electromyography studies
  • Gastric Cancer Management and Outcomes
  • Drug-Induced Adverse Reactions
  • Cardiovascular Function and Risk Factors
  • Abdominal vascular conditions and treatments
  • Lipid metabolism and disorders
  • Pulmonary Hypertension Research and Treatments
  • Cardiac Arrhythmias and Treatments
  • Advanced Neuroimaging Techniques and Applications

Kagawa University
2015-2025

Kitasato University
2007-2023

Toshiba (Japan)
2003-2020

Kitasato University Hospital
2017

The Japanese Society of Gastroenterological Surgery
2016

Kyoto University
2002-2003

Saga Medical School Hospital
2003

Zero to Three
2003

Kyoto Pharmaceutical University
2002

Saga-Ken Medical Centre Koseikan
1998

Purpose: The purpose of this study was to investigate the utility diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) value in differentiating benign malignant breast lesions evaluating detection accuracy cancer extension. Materials Methods: We used DWI obtain images 191 (24 benign, 167 malignant) before surgical excision. ADC values were compared, as noninvasive ductal carcinoma (NIDC) invasive (IDC). also evaluated map, which represents distribution values, compared...

10.2463/mrms.4.35 article EN Magnetic Resonance in Medical Sciences 2005-01-01

The authors used breast diffusion-weighted imaging (DWI) to diagnose cancer and identify extension. Isotropic DWI was performed with EPI. apparent diffusion coefficient (ADC) value calculated displayed on an ADC map. compared between the distribution of low values pathologic mean 1.12 +/- 0.24 x 10(-3) mm/s, which lower than that normal tissue. for invasive ductal carcinoma noninvasive carcinoma. sensitivity using a threshold less 1.6 mm/s 95%. Seventy-five percent all cases showed precise...

10.1097/01.rct.0000171913.74086.1b article EN Journal of Computer Assisted Tomography 2005-09-01

Screening for familial hypercholesterolemia (FH) is important reducing the incidence of cardiovascular diseases (CVDs). Cost-effectiveness was evaluated using Kagawa FH screening model, which a combination universal (US) in health examination children 9-10 years old conducted Prefecture, and reverse cascade (RCS) probands' relatives. A lifetime simulation mathematical models (decision tree Markov model) to determine cost-effectiveness introducing series screenings (US + RCS adult relatives)....

10.5551/jat.65181 article EN Journal of Atherosclerosis and Thrombosis 2025-01-01

BACKGROUND Heterozygous familial hypobetalipoproteinemia (FHBL) is a semi-autosomal disorder that caused mainly by an APOB variant. It usually asymptomatic and rarely leads to non-alcoholic steatohepatitis (NASH). CASE SUMMARY A 12-year-old boy was referred our hospital after prolonged elevation of liver enzymes observed during health checkups in Kagawa Prefecture. Abdominal ultrasound showed bright liver, laboratory investigations revealed low low-density lipoprotein cholesterol...

10.4254/wjh.v17.i2.103299 article EN World Journal of Hepatology 2025-02-20

Familial hypercholesterolemia (FH) is an underdiagnosed autosomal dominant genetic disorder characterized by high levels of plasma low-density lipoprotein cholesterol (LDL-C) from birth. This study aimed to assess the identification FH in children with LDL-C who are identified a universal pediatric screening Kagawa, Japan.In 2018 and 2019, 15,665 aged 9 or 10 years underwent lipid as part annual health checkups for prevention lifestyle-related diseases Kagawa prefecture. After excluding...

10.5551/jat.62780 article EN Journal of Atherosclerosis and Thrombosis 2021-06-25

To evaluate the feasibility and usefulness of imipenem/cilastatin sodium (IPM/CS) as an embolic agent for intestinal bleeding from neoplasms.Seven patients who underwent 11 transarterial embolisations (TAEs) using IPM/CS material duodenal or small/large tumour January 2004 to December 2011 were retrospectively evaluated. A mixture contrast medium was introduced through microcatheter positioned at feeding artery until extravasation disappeared stasis blood flow staining observed.Haemostasis...

10.1186/2193-1801-2-344 article EN SpringerPlus 2013-07-26

To assess the effect of motion artifact reduction on diffusion-weighted magnetic resonance imaging (DWI-MRI) liver, we compared velocity-compensated DWI (VC-DWI) and VC-DWI combined with tetrahedral gradients (t-VC-DWI) to conventional (c-DWI) in assessment apparent diffusion coefficients (ADCs) liver.In 12 healthy volunteers, liver was scanned c-DWI, VC-DWI, t-VC-DWI sequences. The signal-to-noise ratio (SNR) ADC parenchyma were measured among sequences.The image quality visually better for...

10.1002/jmri.23796 article EN Journal of Magnetic Resonance Imaging 2012-09-14

Diaphragmatic Hernia After Radiofrequency Ablation Therapy for Hepatocellular CarcinomaAkitaka Shibuya1, Takahide Nakazawa1, Katsunori Saigenji1, Kazunori Furuta2 and Keiji Matsunaga3Audio Available | Share

10.2214/ajr.04.0931 article EN American Journal of Roentgenology 2006-04-21

Objective This historical control study was performed to evaluate i) the rebleeding rate of bleeding colon diverticula treated with endoscopic band ligation (EBL) versus clipping (EC) and ii) risk factors for initially by hemostasis. Methods From January 2010 December 2012, 68 patients were EC, from 2013 August 2016, 67 EBL. All in each group followed up one year check rebleeding. Results The lower EBL (7 67, 10%) than EC (21 68, 31%; p<0.01). difference mainly due same hemorrhagic...

10.2169/internalmedicine.1473-18 article EN Internal Medicine 2018-10-16

Familial hypercholesterolemia (FH) is a genetic disorder characterized by elevated low-density lipoprotein cholesterol (LDL-C) levels, which increases the risk of premature coronary artery disease. Early detection and treatment are vital, especially in children. To improve FH diagnosis children, Japan Atherosclerosis Society (JAS) released new guidelines July 2022. This study assessed compared sensitivity specificity clinical diagnostic criteria from JAS pediatric 2017

10.5551/jat.64513 article EN Journal of Atherosclerosis and Thrombosis 2024-02-01

Transitional medicine refers to the seamless continuity of medical care for patients with childhood-onset diseases as they grow into adulthood. The transition must be in treatment and other aids such subsidies expenses health system. Inappropriate transitional care, either or social, directly causes poorer prognosis many early-onset diseases, including primary dyslipidemia caused by genetic abnormalities. Many dyslipidemias are designated intractable Japanese system specific aids, having no...

10.5551/jat.rv22016 article EN Journal of Atherosclerosis and Thrombosis 2024-03-25

Trypanocidal constituents of dried leaves Laurus nobilis L. (Lauraceae) were examined. Activity-guided fractionation the methanol extract resulted in isolation two guaianolides, dehydrocostus lactone (1) and zaluzanin D (2), a new p-menthane hydroperoxide, (1R,4S)-1-hydroperoxy-p-menth-2-en-8-ol acetate (3). The minimum lethal concentrations these compounds against epimastigotes Trypanosoma cruzi 6.3, 2.5, 1.4 μM, respectively.

10.1248/cpb.50.1514 article EN Chemical and Pharmaceutical Bulletin 2002-01-01

Stress corrosion cracking (SCC) has been reported at the aged components in many nuclear power plants. Toshiba developing underwater laser welding. This welding technique can be conducted without draining water reactor vessel. It is beneficial for workers not to exposure radiation. The speed attaining twice as fast that of Gas Tungsten Arc Welding (GTAW). susceptibility SCC also lower than Alloy 600 base metal.

10.1299/jpes.3.51 article EN Journal of Power and Energy Systems 2009-01-01

Septal penetration of high-energy photons affects quantitative results in imaging (123)I-labeled tracers. We investigated acquisition protocols (collimator choice and energy window setting) correction methods for estimating the heart-to-mediastinum (H/M) ratio cardiac (123)I-metaiodobenzylguanidine (MIBG) imaging.Four hours after (123)I-MIBG injection, 40 patients successively underwent planar anterior chest with medium-energy (ME) (ME method) low-energy high-resolution (LEHR) (LEHR...

10.2967/jnumed.112.111955 article EN Journal of Nuclear Medicine 2013-03-27

&lt;b&gt;&lt;i&gt;Background/Aims:&lt;/i&gt;&lt;/b&gt; This study aimed at (i) clarifying the factors associated with high scores on modified frequency scale for symptoms of gastroesophageal reflux disease (FSSG) among 3,505 relatively healthy subjects undergoing routine medical health checkups gastrointestinal endoscopy and (ii) comparing risk FSSG between without esophagitis. &lt;b&gt;&lt;i&gt;Methods:&lt;/i&gt;&lt;/b&gt; In total, (male/female: 1,922/1,583) who underwent upper during 5...

10.1159/000445713 article EN Digestion 2016-01-01
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