A5060847080- MRI in cancer diagnosis
- Advanced MRI Techniques and Applications
- Medical Imaging Techniques and Applications
- Radiomics and Machine Learning in Medical Imaging
- Ovarian cancer diagnosis and treatment
- Advanced Neuroimaging Techniques and Applications
- Endometriosis Research and Treatment
- Endometrial and Cervical Cancer Treatments
- Uterine Myomas and Treatments
- Cardiac Imaging and Diagnostics
- Gynecological conditions and treatments
- Lung Cancer Diagnosis and Treatment
- Advanced X-ray and CT Imaging
- Hepatocellular Carcinoma Treatment and Prognosis
- Medical Imaging and Pathology Studies
- Lanthanide and Transition Metal Complexes
- Cerebrovascular and Carotid Artery Diseases
- Neuroendocrine Tumor Research Advances
- Glioma Diagnosis and Treatment
- Pancreatic and Hepatic Oncology Research
- Atomic and Subatomic Physics Research
- Fetal and Pediatric Neurological Disorders
- Cancer, Hypoxia, and Metabolism
- Moyamoya disease diagnosis and treatment
- Radiopharmaceutical Chemistry and Applications
Kyoto University
2012-2021
Kyoto University Hospital
2009-2020
Society of Nuclear Medicine and Molecular Imaging
2007-2020
Japan Science and Technology Agency
2008-2019
National Institute of Informatics
2019
Kyushu University
2019
Graduate School USA
2019
Ehime University
2018
Canon (Japan)
2016-2017
Rakuwakai Otowa Hospital
2017
PURPOSE: To prospectively evaluate the elastographic appearance of thyroid gland tumors and explore potential sensitivity specificity ultrasonographic (US) elastography for differentiating benign malignant tumors, with histopathologic analysis as reference standard. MATERIALS AND METHODS: The study was institutional review board approved, each patient gave written informed consent. Fifty-two lesions (22 malignant, 30 benign) in 31 consecutive patients (six men, 25 women; mean age, 49.7 years...
The value of 1.5-T magnetic resonance (MR) imaging in diagnosing endometrial cysts and differentiating them from other gynecologic masses was prospectively evaluated 374 female patients with clinically suspected adnexal masses. A suggestive diagnosis cyst made when a that hyperintense on T1-weighted images exhibited homogeneous hyperintensity T2-weighted images. definitive hypointense signal (shading) or the lesion consisted multiple (multiplicity) regardless intensity Surgery performed 293...
Endometriosis is a common gynaecological condition of unknown aetiology that primarily affects women reproductive age. The accepted first-line imaging modality pelvic ultrasound. However, magnetic resonance (MRI) increasingly performed as an additional investigation in complex cases and for surgical planning. There currently no international consensus regarding patient preparation, MRI protocols or reporting criteria. Our aim was to develop clinical guidelines evaluation endometriosis based...
Abstract Noninvasive measurement of the distribution and oxygenation state hemoglobin (Hb) inside tissue is strongly required to analyze tumor-associated vasculatures. We developed a photoacoustic imaging (PAI) system with hemispherical-shaped detector array (HDA). Here, we show that PAI HDA revealed finer vasculature, more detailed blood-vessel branching structures, morphological vessel characteristics compared MRI by use breast shape deformation their fused image. Morphologically abnormal...
We present distinct patterns of neurite distribution in the human cerebral cortex using diffusion magnetic resonance imaging (MRI). analyzed both high-resolution structural (T1w and T2w images) MRI data 505 subjects from Human Connectome Project. Neurite distributions were evaluated orientation dispersion density (NODDI) model, optimized for gray matter, mapped onto cortical surface a method weighted towards mid-thickness to reduce partial volume effects. The estimated was high somatosensory...
Purpose: To prospectively estimate the accuracy of sonoelastography in differentiation benign and metastatic cervical lymph nodes (LNs) patients suspected having thyroid or hypopharyngeal cancer, with histologic nodal findings as reference standard. Materials Methods: The study protocol was approved by hospital review board; each patient gave written informed consent. One hundred forty-one peripheral neck LNs (60 metastatic, 81 metastasis free) 43 consecutive (22 men, 21 women; mean age, 58...
Magnetic resonance (MR) imaging was performed in ten patients with pituitary stalk transection who had idiopathic dwarfism. Contiguous sagittal T1-weighted images were obtained all cases, and, some, axial or coronal taken for further evaluation. On MR images, normal anterior and posterior lobes of the gland can be clearly differentiated because lobe has a characteristic high intensity on images. In patients, high-intensity not seen, but similar signal observed at proximal stump seven...
To determine the feasibility of diffusion-weighted (DW) MRI uterine endometrial cancer and to investigate whether apparent diffusion coefficient (ADC) values differ from those normal endometrium they according histologic grade tumor.Study population included 18 consecutive females with surgically proven 12 pathologically confirmed in cervical patients. Visual evaluation ADC measurement were performed endometrium.All appeared hyperintense on DW images. The mean value (10(-3) mm(2)/second) was...
The potential of magnetic resonance (MR) imaging in differentiation adenomyosis from leiomyoma was evaluated 93 patients who had a palpable enlarged uterus that suspect for or adenomyosis. In all cases, MR images were correlated with surgical/pathologic findings. Pathologic findings showed 71 uteri due to leiomyoma, including one leiomyosarcoma, and 16 other six shown have an attributable simultaneous involvement both lesions. On T2-weighted images, appeared as ill-defined, relatively...
To prospectively compare combined radiofrequency ablation and transcatheter arterial chemoembolization (TACE) with alone for the treatment of small (< or =3 cm) hepatocellular carcinomas (HCCs).The ethics committee study institution approved protocol. Written informed consent was obtained from all patients at enrollment. Eighty-nine 93 HCC nodules 0.8-3.0 cm (mean +/- standard deviation, 1.7 0.5) in diameter were randomly treated TACE (46 49 nodules) (43 44 nodules). The followed up 9-68...
Demonstration and staging of carcinoma the cervix with magnetic resonance (MR) imaging was evaluated prospectively in 67 patients histologically proven lesions. Findings were correlated surgical/pathologic results obtained within 2 weeks. MR had an accuracy 95% demonstrating invasive disease (stage IB or higher). It capable depicting location extent tumor invasion cervical stroma helped detect beneath relatively normal epithelium endocervical canal that not been detected by means colposcopic...
The purpose of this study was to explore the potential non-Gaussian diffusion and perfusion magnetic resonance imaging (MRI) using intravoxel incoherent motion (IVIM) MRI for diagnosis breast lesions.This included 26 women with lesions. Diffusion-weighted images were acquired 16 b values up 2500 s/mm analyzed a kurtosis model (apparent coefficient [ADC0] [K]) component IVIM (perfusion fraction [fIVIM] pseudodiffusion [D*]) component. Diagnostic performance parameters evaluated from receiver...
The posterior lobe of the pituitary gland was evaluated by 1.5 T magnetic resonance (MR) in five cases diabetes insipidus (DI), including one primary (idiopathic) and four secondary DI due to germinomas (two), teratoma (one), histiocytosis χ (one). normal displays high signal indistinguishable from fatty tissue on T1-weighted images (T1WI) (short T1 value). In all not detected fossa T1WI. Hence, because this characteristic finding, MR may greatly assist diagnosis DI. We speculate that short...
The purpose of this study was to evaluate the usefulness delayed enhanced MRI for detecting cardiac sarcoidosis and clarify relationship between findings those radionuclide imaging.Delayed is considered a useful method early identification sarcoidosis. Delayed hyperenhancement frequently associated with reduction regional wall motion thallium-201 perfusion defects.
We developed a computer-aided diagnosis (CADx) method for classification between benign nodule, primary lung cancer, and metastatic cancer evaluated the following: (i) usefulness of deep convolutional neural network (DCNN) CADx ternary classification, compared with conventional (hand-crafted imaging feature plus machine learning), (ii) effectiveness transfer learning, (iii) effect image size as DCNN input. Among 1240 patients previously-built database, computed tomography images clinical...
We aimed to evaluate a computer-aided diagnosis (CADx) system for lung nodule classification focussing on (i) usefulness of the conventional CADx (hand-crafted imaging feature + machine learning algorithm), (ii) comparison between support vector (SVM) and gradient tree boosting (XGBoost) as algorithms, (iii) effectiveness parameter optimization using Bayesian random search. Data 99 nodules (62 cancers 37 benign nodules) were included from public databases CT images. A variant local binary...