A5077675196- Advanced MRI Techniques and Applications
- MRI in cancer diagnosis
- Medical Imaging Techniques and Applications
- Gallbladder and Bile Duct Disorders
- Radiomics and Machine Learning in Medical Imaging
- Pancreatic and Hepatic Oncology Research
- Transplantation: Methods and Outcomes
- Atomic and Subatomic Physics Research
- Cerebral Venous Sinus Thrombosis
- Ultrasound and Hyperthermia Applications
- Cholangiocarcinoma and Gallbladder Cancer Studies
- Hepatocellular Carcinoma Treatment and Prognosis
- Traumatic Brain Injury and Neurovascular Disturbances
- Gastrointestinal disorders and treatments
- Gastrointestinal Tumor Research and Treatment
- Advanced Neuroimaging Techniques and Applications
- Viral Infections and Immunology Research
- Ultrasound Imaging and Elastography
- Metastasis and carcinoma case studies
- Ultrasound in Clinical Applications
- Manufacturing Process and Optimization
- Gastric Cancer Management and Outcomes
- Fetal and Pediatric Neurological Disorders
- Pneumonia and Respiratory Infections
- Ophthalmology and Eye Disorders
Teikyo University
2022-2023
Tokyo Women's Medical University Adachi Medical Center
2008-2020
Nagoya University
1998-2014
Tokyo Metropolitan University
2012
Tokyo Women's Medical University
2010
Hiroshima University
1998
DKFZ-ZMBH Alliance
1998
Kurashiki Central Hospital
1992
The purpose of this study was to clarify the usefulness contrast-enhanced endoscopic ultrasonography in pancreatic diseases.The subjects comprised 37 patients with diseases: 11 ductal cell carcinoma, 10 mucin-producing tumor, five pseudo-cyst, four islet chronic pancreatitis, and three serous cystadenoma. After ultrasonography, Albunex (0.22 ml/kg) injected intravenously at a rate 1 ml/s into right median vein, observation continued for min. presence or absence enhancement lesion determined...
Abstract Purpose To confirm the superiority of navigator‐triggered prospective acquisition correction (PACE) technique over conventional respiratory‐triggered (RESP) technique, something that has been perceived experimentally but without definite evidence, for free‐breathing three‐dimensional (3D) magnetic resonance cholangiopancreatography (MRCP) using healthy volunteers. Materials and Methods Free‐breathing 3D turbo spin‐echo MRCP both PACE RESP techniques were prospectively performed on...
Purpose: We compared the image quality of SPACE (sampling perfection with application optimized contrasts using different flip angle evolutions) and conventional 3D turbo spin echo (TSE) magnetic resonance cholangiopancreatography (MRCP) at 1.5 tesla regard to difference in spacing. Methods: Twenty healthy volunteers prospectively underwent navigator-triggered TSE MRCP 1.5T identical parameters, except for Quantitative analyses signal-to-noise ratio (SNR), contrast-to-noise (CNR), relative...
Abstract Purpose: To assess the ability of magnetic resonance imaging (MRI) to depict semicircular canals inner ear by comparing results from sampling perfection with application‐optimized contrasts using different flip angle evolutions (SPACE) sequence those true free induction steady precession (TrueFISP) sequence. Materials and Methods: A 1.5‐T MRI system was used perform an in vivo study 10 healthy volunteers 17 patients. three‐point visual score employed for assessing depiction facial...
Various three-dimensional ultrasonography systems have been developed. We estimated the accuracy of a system for measuring gallbladder volume and compared results to sum-of-cylinders method.In an in vitro study, 10 balloons various shapes, sized 5-68 mL were scanned by real-time ultrasonography. In vivo we evaluated emptying 14 healthy male volunteers after ingestion two raw egg yolks. both studies, measurement was performed method method.With method, mean difference between measured true...
To evaluate whether perfusion fraction (PF) calculated with diffusion-weighted magnetic resonance imaging (MRI) predicts the presence of blood supply in ovarian masses.PFs 92 lesions 53 patients administered gadolinium were retrospectively images at b-values 0, 500, and 1000 sec/mm(2). PFs compared between lesions, except for fat, (n = 21) or without contrast enhancement 57), using Student's t-test receiver operating characteristics (ROC) curve analysis. Lesion rates contrast-enhanced 30 180...
To elucidate the causes of aliasing artifacts with BLADE technique and clarify effective suppression methods.We separately observed from features inside then outside defined field-of-view (FOV) using phantom studies. The effectiveness suppressing them phase oversampling (POS) presaturation pulses (SAT) was evaluated. Finally, our observations were confirmed for a healthy volunteer.Characteristic both FOV. Those FOV sufficiently suppressed by POS 25%, considering acquisition time...
Abstract Purpose: To compare the image qualities of unenhanced electrocardiographically (ECG)‐gated fast spin‐echo magnetic resonance digital subtraction angiography (MRDSA) using a short echo‐spacing three‐dimensional (3D) sequence, known as sampling perfection with application‐optimized contrasts different flip angle evolutions (SPACE), and conventional half‐Fourier single‐shot turbo (HASTE) sequence. Materials Methods: Unenhanced ECG‐gated MRDSA SPACE HASTE femoral arteries were...
To reduce noise for low-field magnetic resonance imaging (MRI) using Noise2Void (N2V) and to demonstrate the N2V validity. is one of denoising convolutional neural network methods that allows training a model without noiseless clean image. In this study, kiwi fruit was scanned 0.35 Tesla MRI system, image qualities at pre- postdenoising were evaluated. Structural similarity (SSIM), signal-to-noise ratio (SNR), contrast (CR) measured, visual assessment sharpness observed. Both SSIM SNR...
It is well known that the critical upper field Bc2 improved by shortening of coherence length owing to scattering electrons in a superconductor. In order improve YBa2Cu3Oy (YBCO) films our study, we substituted 3d metals (M = Zn, Co, Ni, Fe) for Cu sites YBCO films. We used combinatorial pulsed-laser deposition fabricate different YBa2(Cu1-xMx)3Oy continuously changing amount substitution metal x, from 0 0.01 on single substrate using. As result, superconducting transition temperature Tc and...