Iichiro Osawa
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View article: Ovarian Sertoli-Leydig Tumour in a Postmenopausal Female With Virilisation: Magnetic Resonance Imaging Findings
Ovarian Sertoli-Leydig Tumour in a Postmenopausal Female With Virilisation: Magnetic Resonance Imaging Findings Open
Sertoli-Leydig cell tumours (SLCTs) of the ovary are uncommon sex cord-stromal tumours that may cause virilisation and menometrorrhagia. Herein, we describe the magnetic resonance imaging features of SLCT in a 75-year-old female who exhibi…
View article: Contrast Enhancement of the Olfactory Recess Using Heavily T2-Weighted 3D Fluid-Attenuated Inversion Recovery Imaging (FLAIR)
Contrast Enhancement of the Olfactory Recess Using Heavily T2-Weighted 3D Fluid-Attenuated Inversion Recovery Imaging (FLAIR) Open
Purpose This study aimed to assess the contrast enhancement of the olfactory recess using heavily T2-weighted 3D fluid-attenuated inversion recovery (FLAIR) imaging after intravenous gadolinium administration. Methods This retrospective st…
View article: Co-occurrence of Neuromyelitis Optica Spectrum Disorder and Idiopathic Multicentric Castleman Disease Successfully Treated with Tocilizumab
Co-occurrence of Neuromyelitis Optica Spectrum Disorder and Idiopathic Multicentric Castleman Disease Successfully Treated with Tocilizumab Open
We herein report a 52-year-old woman with anti-aquaporin 4 antibody-positive neuromyelitis optica spectrum disorder (NMOSD) and idiopathic multicentric Castleman disease (iMCD) who was successfully treated with tocilizumab, a humanized ant…
View article: Three-dimensional convolutional neural network-based classification of chronic kidney disease severity using kidney MRI
Three-dimensional convolutional neural network-based classification of chronic kidney disease severity using kidney MRI Open
A three-dimensional convolutional neural network model was developed to classify the severity of chronic kidney disease (CKD) using magnetic resonance imaging (MRI) Dixon-based T1-weighted in-phase (IP)/opposed-phase (OP)/water-only (WO) i…
View article: Comparing 2-dimensional versus 3-dimensional MR myelography for cerebrospinal fluid leak detection
Comparing 2-dimensional versus 3-dimensional MR myelography for cerebrospinal fluid leak detection Open
View article: Utility of a Three-dimensional Convolutional Neural Network-based Renal Function Prediction Using Kidney MRI in Chronic Kidney Disease
Utility of a Three-dimensional Convolutional Neural Network-based Renal Function Prediction Using Kidney MRI in Chronic Kidney Disease Open
A three-dimensional convolutional neural network model was developed to predict renal function in patients with chronic kidney disease (CKD) using magnetic resonance imaging (MRI) Dixon-based T1-weighted in-phase (IP)/opposed-phase (OP)/wa…
View article: The utility of automatic segmentation of kidney MRI in chronic kidney disease using a 3D convolutional neural network
The utility of automatic segmentation of kidney MRI in chronic kidney disease using a 3D convolutional neural network Open
We developed a 3D convolutional neural network (CNN)-based automatic kidney segmentation method for patients with chronic kidney disease (CKD) using MRI Dixon-based T1-weighted in-phase (IP)/opposed-phase (OP)/water-only (WO) images. The d…
View article: New-onset Immune-mediated Necrotizing Myopathy and Trigeminal Neuropathy after SARS-CoV-2 mRNA Vaccination in a Patient with Rheumatoid Arthritis and Sjögren's Syndrome
New-onset Immune-mediated Necrotizing Myopathy and Trigeminal Neuropathy after SARS-CoV-2 mRNA Vaccination in a Patient with Rheumatoid Arthritis and Sjögren's Syndrome Open
We present the case of a 42-year-old woman with rheumatoid arthritis and Sjögren's syndrome treated with adalimumab who developed immune-mediated necrotizing myopathy (IMNM) and trigeminal neuropathy after severe acute respiratory syndrome…
View article: Utility of contrast-enhanced 3D STIR FLAIR imaging for evaluating pituitary adenomas at 3 Tesla
Utility of contrast-enhanced 3D STIR FLAIR imaging for evaluating pituitary adenomas at 3 Tesla Open
View article: A Case of COVID-Related MERS (Clinically Mild Encephalitis/Encephalopathy with a Reversible Splenial Lesion) with a Typical Imaging Course and Hyponatremia in Adults—A Case Report and Literature Review
A Case of COVID-Related MERS (Clinically Mild Encephalitis/Encephalopathy with a Reversible Splenial Lesion) with a Typical Imaging Course and Hyponatremia in Adults—A Case Report and Literature Review Open
Clinically mild encephalitis/encephalopathy with reversible splenial lesions (MERS) is a mild form of encephalitis/encephalopathy that appears in association with various conditions, including infection. COVID-19 is also known to cause MER…
View article: Signal and morphological changes in the endolymph of patients with vestibular schwannoma on non-contrast 3D FLAIR at 3 Tesla
Signal and morphological changes in the endolymph of patients with vestibular schwannoma on non-contrast 3D FLAIR at 3 Tesla Open
Background Non-contrast FLAIR revealed increased signal within the inner ear in patients with vestibular schwannoma, which is generally assumed to occur in the perilymph; however, the majority of previous studies did not differentiate betw…
View article: Contrast Enhancement of the Normal Infundibular Recess Using Heavily T2-weighted 3D FLAIR
Contrast Enhancement of the Normal Infundibular Recess Using Heavily T2-weighted 3D FLAIR Open
The present results demonstrated that the infundibular recess was enhanced on HT2-FLAIR after an intravenous gadolinium injection. The infundibular recess may be a potential source of the leakage of intravenously administered gadolinium in…
View article: A case of inner ear malformations that was administered a detailed vestibular test battery
A case of inner ear malformations that was administered a detailed vestibular test battery Open
Inner ear malformations are rarely encountered, but are present in approximately 20% of the patients with congenital sensorineural hearing loss. At present, hearing aids and cochlear implantation are considered as effective treatments for …
View article: Intravenous enhanced 3D FLAIR imaging to identify CSF leaks in spontaneous intracranial hypotension: Comparison with MR myelography
Intravenous enhanced 3D FLAIR imaging to identify CSF leaks in spontaneous intracranial hypotension: Comparison with MR myelography Open
View article: High-speed scanning of planar images showing 123I-MIBG uptake using a whole-body CZT camera: a phantom and clinical study
High-speed scanning of planar images showing 123I-MIBG uptake using a whole-body CZT camera: a phantom and clinical study Open
View article: Focal concavity of posterior superior acetabulum and its relation with acetabular dysplasia and retroversion in adults without advanced hip osteoarthritis
Focal concavity of posterior superior acetabulum and its relation with acetabular dysplasia and retroversion in adults without advanced hip osteoarthritis Open
Focal concavity of posterior superior acetabulum could be a rare morphologic abnormality of acetabular formation independent of lateral or anterior dysplasia or retroversion.