A5047651226- Advanced X-ray and CT Imaging
- Radiation Dose and Imaging
- Advanced MRI Techniques and Applications
- MRI in cancer diagnosis
- Cardiac Imaging and Diagnostics
- Medical Imaging Techniques and Applications
- Hepatocellular Carcinoma Treatment and Prognosis
- Liver Disease Diagnosis and Treatment
- Radiomics and Machine Learning in Medical Imaging
- Cerebrovascular and Carotid Artery Diseases
- Intracranial Aneurysms: Treatment and Complications
- Liver Disease and Transplantation
- Advanced Neuroimaging Techniques and Applications
- Lung Cancer Diagnosis and Treatment
- Head and Neck Cancer Studies
- Advanced Radiotherapy Techniques
- Pancreatic and Hepatic Oncology Research
- Glioma Diagnosis and Treatment
- Gallbladder and Bile Duct Disorders
- Lanthanide and Transition Metal Complexes
- Amyloidosis: Diagnosis, Treatment, Outcomes
- Renal cell carcinoma treatment
- Atomic and Subatomic Physics Research
- Vascular Malformations Diagnosis and Treatment
- Organ Transplantation Techniques and Outcomes
Kumamoto University
2013-2022
Kumamoto University Hospital
2005-2019
Weatherford College
2019
Kumamoto City Hospital
2009-2018
Hiroshima University
2013-2017
Kumamoto Medical Center
1994-2017
Creative Commons
2016
Kumamoto Health Science University
2008-2016
University of Miyazaki
2015
Saiseikai Kumamoto Hospital
2008-2014
PURPOSE: To prospectively investigate the effect of low tube voltage on radiation dose, contrast enhancement, image quality, and noise at abdominal dynamic computed tomography (CT). MATERIALS AND METHODS: The institutional review board approved this study. Prior informed consent was obtained from all patients. Forty patients (24 women, 16 men; mean age, 62 years) underwent initial CT 120 kV with 100 mL material (protocol A). Then were randomly assigned to one two protocols B, 90 material;...
Purpose: To test whether our proposed denoising approach with deep learning-based reconstruction (dDLR) can effectively denoise brain MR images.
To evaluate retrospectively if there is additional diagnostic value of fused single photon emission computed tomographic (SPECT) and (CT) images in assessing possible bone metastases.Institutional review board approval was obtained, each patient provided written informed consent. Bone scintigraphy--including planar SPECT imaging-and CT were performed with a combined SPECT/CT system 45 oncologic patients (24 men, 21 women; mean age, 64.7 years +/- 8.7), total 42 metastatic foci 40 benign...
To determine the optimal dose of intravenous contrast material for helical computed tomography (CT) abdomen on basis patient weight.A prospective randomized study CT was performed by using different doses in 221 patients (mean body weight, 57.3 kg) who were assigned randomly to three groups receiving 1.5, 2.0, or 2.5 mL/kg a fixed 100 mL iopamidol 300. The degree enhancement scored visually. numbers (HU) aorta, portal vein, liver, and pancreas obtained at levels abdomen.In arterial...
Treatment of hepatocellular carcinoma: value percutaneous microwave coagulation.R Murakami, S Yoshimatsu, Y Yamashita, T Matsukawa, M Takahashi and K SagaraAudio Available | Share
To reduce radiation dose from abdominal computed tomography (CT) without degradation of low-contrast detectability by using a technique with low tube voltage (90 kV).The institutional review board approved the participation radiologists in observer performance test, and informed consent was obtained all participating radiologists. A phantom for measurement containing objects were scanned 16-detector row CT scanner at 120 kV 90 kV. For determination both kV, current-time product settings...
The purpose of this study was to determine the relationship between apparent diffusion coefficient (ADC) and diffuse renal disease by diffusion-weighted echolanar magnetic resonance (MR) imaging (EPI). Thirty-four patients were examined with EPI. average ADC values 2.55 x 10(-3) mm2/sec for cortex 2.84 medulla in normal kidneys. both chronic failure (CRF) kidneys acute (ARF) significantly lower than those In artery stenosis kidneys, contralateral cortex, above 1.8 all 32 ranging from 1.6 2.0...
Purpose: To retrospectively evaluate whether the thin-section computed tomographic (CT) appearance has prognostic value for prediction of mortality, number ventilator-free days (ie, without mechanical ventilation), and 28-day risk barotrauma in patients with a clinically early stage acute respiratory distress syndrome (ARDS) from diverse causes. Materials Methods: Institutional review board approval informed consent were obtained. Two independent observers who blinded to patient outcomes...
To prospectively compare in vivo hepatic automated volumetry with manual and measured liver volume.The study was conducted accordance the guidelines of Institutional Review Board Kumamoto University (Japan). Patient informed consent obtained. Preoperative multisection computed tomography (CT) performed 35 consecutive patients (21 men, 14 women; mean age, 42.8 years; range, 28-72 years) disease awaiting living related transplantation. The CT scans covered entire at a section thickness 2.5 mm....
To assess the utility of both minimum apparent diffusion coefficients (ADCs) and ADC difference values for grading astrocytic tumors at magnetic resonance imaging.The hospital's institutional review board approved this retrospective study waived informed consent. Fifty patients (23 male patients, 27 female patients; median age, 53 years) with newly diagnosed were evaluated. Two observers blinded to clinical information independently measured ADCs by manually placing three five regions...
To retrospectively evaluate whether the minimum apparent diffusion coefficient (ADC) of tumor seen on pretreatment magnetic resonance (MR) images is prognostic value in patients with malignant supratentorial astrocytoma.The study was approved by institutional review board; requirement for informed patient consent waived. Between June 1996 and November 2003, 79 (44 male, 35 female; age range, 16-76 years) astrocytoma underwent MR imaging. Patient age, symptom duration, neurologic function,...
<h3>BACKGROUND AND PURPOSE:</h3> The usefulness of contrast-enhanced 3D T2-FLAIR MR imaging for the evaluation leptomeningeal diseases has not been systematically investigated. purpose this study was to assess value added by and MPRAGE sequences conventional postcontrast T1-weighted images in diseases. We also undertook vitro studies attempts understand consequences our patient study. <h3>MATERIALS METHODS:</h3> Twelve patients with confirmed underwent T1-weighted, MPRAGE, at 3T. Two...
We compare the performance of low tube voltage with hybrid iterative reconstruction (iDose) standard and filtered backprojection (FBP) using phantoms at computed tomographic coronary angiography. In angiography, application combined iDose resulted in significant image quality improvements compared to FBP. Image was same or better despite a reduction radiation dose by 76%
Purpose To evaluate the effect on image quality of a low contrast agent dose and radiation protocol at abdominal dynamic computed tomography (CT) with tube voltage, hybrid iterative reconstruction algorithm, 256– detector row scanner. Materials Methods This prospective study received institutional review board approval, prior informed written consent was obtained from all patients. Seventy-four patients undergoing hepatic CT were randomly assigned to one two protocols: Thirty-nine underwent...