A5044757880- MRI in cancer diagnosis
- Medical Imaging Techniques and Applications
- Radiomics and Machine Learning in Medical Imaging
- Bone and Joint Diseases
- Advanced MRI Techniques and Applications
- Glioma Diagnosis and Treatment
- Cardiovascular Disease and Adiposity
- Liver Disease Diagnosis and Treatment
- Sarcoma Diagnosis and Treatment
- Musculoskeletal synovial abnormalities and treatments
- Intracranial Aneurysms: Treatment and Complications
- Cerebrospinal fluid and hydrocephalus
- Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
- Lung Cancer Diagnosis and Treatment
- Amyloidosis: Diagnosis, Treatment, Outcomes
- Advanced X-ray and CT Imaging
- Cerebrovascular and Carotid Artery Diseases
- Pancreatic and Hepatic Oncology Research
- Renal and Vascular Pathologies
- Orthopedic Surgery and Rehabilitation
- Gastrointestinal disorders and treatments
- Hepatitis C virus research
- Alzheimer's disease research and treatments
- IgG4-Related and Inflammatory Diseases
- Spinal Dysraphism and Malformations
University of Occupational and Environmental Health Japan
2016-2025
Nagasaki University Hospital
2013
Kumamoto University
2003-2008
DNA Diagnostic (Denmark)
2008
Kumamoto University Hospital
2007
Nagasaki University
1969-1999
Kurume University
1988-1990
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,...
Although the prognostic value of perfusion MR imaging in various gliomas has been investigated, that high-grade astrocytomas alone not fully evaluated. The purpose this study was to evaluate retrospectively whether tumor maximum relative cerebral blood volume (rCBV) on pretreatment is patients with astrocytoma.Between January 1999 and December 2002, 49 (30 men, 19 women; age range, 23-76 years) supratentorial astrocytoma underwent before inception treatment. patient age, sex, symptom...
To determine the reproducibility of quantitative chemical shift-based water-fat separation method with a multiecho gradient echo sequence [iteraterative decomposition water and fat asymmetry least-squares estimation quantitation (IDEAL-IQ)] for assessing bone marrow fraction (FF); to evaluate variation FF at different sites; investigate its association age menopause.31 consecutive females who underwent pelvic iterative 3-T MRI were included in this study. Quantitative using IDEAL-IQ four...
Basal interventricular septum (IVS) hypertrophy (BSH) is characterized by a reduced aortoseptal angle and thickened basal IVS. The BSH shape suggests compression the longitudinally elongated ascending aorta (pseudohypertrophy), further suggesting possibility of surgical aortic wall shortening to improve BSH. We report case 77-year-old woman with an asymptomatic dissecting thoracic aneurysm clear Surgical root replacement longitudinal clearly improved BSH, demonstrating beneficial effects on...
Abstract Purpose To evaluate the potential of diffusion‐weighted imaging (DWI) in distinguishing chronic expanding hematomas (CEHs) from malignant soft tissue tumors. Materials and Methods We performed conventional MRI DWI six CEHs 31 tumors 37 patients seen between May 2000 November 2006. was obtained with a single‐shot echo‐planar (EPI) sequence using 1.5T MR imager. The mean apparent diffusion coefficient (ADC) value also calculated. evaluated findings compared ADC Results On MRI, two...
Abstract Purpose To determine whether quantitative diffusion‐weighted imaging (DWI) is useful for characterizing poorly contrast‐enhanced and T2‐prolonged bone masses. Materials Methods We studied 20 masses that showed high signal intensity on T2‐weighted images poor enhancement T1‐weighted images. These included eight solitary cysts, five fibrous dysplasias, seven chondrosarcomas. analyze diffusion changes we calculated the apparent coefficient (ADC) each lesion. Results The ADC values of...
The purpose of this article is to compare tomosynthesis with radiography and MRI the wrist hand for evaluating bone erosion in patients rheumatoid arthritis (RA).Twenty consecutive an established diagnosis RA five control were included study. They underwent radiography, tomosynthesis, bilateral within a week. mean total dose was 0.13 0.25 mGy, respectively. evaluation performed according Outcome Measures Rheumatology Clinical Trials recommendations. Bone on images from three modalities...
Endometrial Carcinoma in Adenomyosis: Assessment of Myometrial Invasion on T2-Weighted Spin-Echo and Gadolinium-Enhanced T1-Weighted ImagesDaisuke Utsunomiya1, Shiho Notsute1, Yoshiko Hayashida1, Flora Lwakatare1, Hidetaka Katabuchi2, Hitoshi Okamura2, Kazuo Awai3 Yasuyuki Yamashita1Audio Available | Share
Abstract Purpose To develop a support vector machine (SVM) classifier using CT texture-based analysis in differentiating focal-type autoimmune pancreatitis (AIP) and pancreatic duct carcinoma (PD), to assess the radiologists’ diagnostic performance with or without SVM. Materials methods This retrospective study included 50 patients (20 AIP 30 PD) who underwent dynamic contrast-enhanced CT. Sixty-two features were extracted from 2D images of arterial portal phase CTs. We conducted data...
Purpose To assess the effects of a new computed tomographic (CT) temporal subtraction (TS) method on radiologist performance in lung nodule detection thin-section CT images. Materials and Methods The institutional review board approved this study, informed consent requirement was waived. Fifty pairs (current previous images) standard-dose 2-mm images corresponding TS were used for an observer study. Two thoracic radiologists identified 30 nodules ranging size from 5 to 19 mm, these served as...
To compare fat-suppressed magnetic resonance imaging (MRI) quality using iterative decomposition of water and fat with echo asymmetry least-squares estimation (IDEAL) that chemical shift selective T1-weighted spin-echo (CHESS) images for evaluating rheumatoid arthritis (RA) lesions the hand finger at 3T.MRI was performed in eight healthy volunteers RA patients a 3.0T MR system (Signa HDxt GE healthcare) an eight-channel knee coil. FS-CHESS-T1-SE IDEAL were acquired coronal planes covering...
3D-susceptibility-weighted angiography (SWAN) can produce high-resolution images that yield excellent susceptibility-weighted contrast at a relatively short acquisition time.To compare SWAN- and 2D-T2*-weighted gradient-echo (T2*-WI) for their sensitivity in the depiction of cerebral hemorrhagic lesions.We subjected 75 patients with suspected lesions to SWAN T2*-WI 3T. We first measured contrast-to-noise ratio (CNR) using an agar phantom contained different concentrations superparamagnetic...
Purpose To compare the MR findings including diffusion‐weighted imaging (DWI) between symptomatic and asymptomatic patients with autoimmune pancreatitis (AIP) to determine whether DWI can be used as an objective biomarker for AIP, which is considered indication steroid therapy. Materials Methods This retrospective study was approved by our institutional review board. MRI scans from 37 AIP (symptomatic, n = 19; asymptomatic, 18) were retrospectively evaluated. The studies performed on a 1.5...
Purpose To determine trabecular bone analysis values by using tomosynthesis images in determining femoral neck strength patients with diabetes mellitus and compare its parameters between vertebral compression fracture nonfracture groups. Materials Methods The institutional review board approved this study, written informed consent was obtained from all patients. Forty-nine were included. Within 1 week, underwent dual x-ray absorptiometry (DXA), tomosynthesis, computed tomography (CT)...
Purpose: Adipocytes around aggressive breast cancer (BC) are less lipid different from naive adipocytes (cancer-associated adipocytes, CAAs), and peritumoral edema caused by the release of cytokines CAAs can conduce to decrease fat proportion. The purpose this study was correlate content identified using iterative decomposition water with echo asymmetry least-squares estimation (IDEAL) lymph node metastasis (LNM) recurrence-free survival (RFS) in BC patients compare T2-weighted (T2WI)...