Publications by authors named "Soichiro Tatsuo"
Article Synopsis
- A study investigated the relationship between hemoglobin levels and brain volume in a large group of elderly participants using MRI scans.
- It involved 2153 participants, mainly aged around 69, and found that lower hemoglobin levels were linked to reduced total white matter volume, especially in younger individuals.
- The study concluded that low hemoglobin levels can negatively impact white matter volume as people age, but didn't find significant effects on gray matter or hippocampal volumes.
Rationale And Objectives: Although hyperintensity in the anterior portion of the callosal splenium on FLAIR (aCS-hyperintensity) is a common finding in elderly adults, no previous studies have examined the clinical significance. In this large elderly population study, we aimed to investigate the associations of aCS-hyperintensity with vascular risk factors, cognitive decline, and other MRI measurements.
Materials And Methods: This cross-sectional study included 2110 participants (median age, 69 years; 61.
Purpose: To evaluate the diagnostic value of T1-weighted 3D fast spin-echo sequence (CUBE) with deep learning-based reconstruction (DLR) for depiction of pituitary adenoma and parasellar regions on contrast-enhanced MRI.
Methods: We evaluated 24 patients with pituitary adenoma or residual tumor using CUBE with and without DLR, 1-mm slice thickness 2D T1WI (1-mm 2D T1WI) with DLR, and 3D spoiled gradient echo sequence (SPGR) as contrast-enhanced MRI. Depiction scores of pituitary adenoma and parasellar regions were assigned by two neuroradiologists, and contrast-to-noise ratio (CNR) was calculated.
Objectives: Previous studies have shown possible choroid plexus (CP) dysfunction in Alzheimer's disease (AD) and highlighted CP enlargement on magnetic resonance imaging (MRI) as a predictive factor of AD. However, few studies have assessed the relationship between CP volume (CPV) and mild cognitive impairment (MCI). In this large elderly population study, we investigated the changes in CPV in patients with MCI using MRI above 65 years.
View Article and Find Full Text PDFAlthough altered networks inside the hippocampus (hippocampal intra-networks) have been observed in dementia, the evaluation of hippocampal intra-networks using magnetic resonance imaging (MRI) is challenging. We employed conventional structural imaging and incident component analysis (ICA) to investigate the structural covariance of the hippocampal intra-networks. We aimed to assess altered hippocampal intra-networks in patients with mild cognitive impairment (MCI).
View Article and Find Full Text PDFArticle Synopsis
- The study explores the use of a new imaging technique called deep learning-based reconstruction (DLR) to enhance MRI scans for better identification of multiple sclerosis (MS) lesions.
- Researchers compared the effectiveness of a high-resolution 1 mm-slice MRI (with DLR) to conventional 5 mm-slice MRI in detecting MS lesions in 42 patients.
- Results showed that the 1 mm T2-weighted MRI with DLR detected significantly more lesions than the standard method, especially in the brain stem, suggesting that this technique could be valuable in clinical practice.
Article Synopsis
- The study investigates how brain volume is affected in elderly individuals with varying levels of dysglycemia, particularly focusing on the prediabetic stage and its potential impact on brain health.
- It involved 2,144 participants with an average age of 69, categorized into groups based on their HbA1c levels, identifying those with normal glucose metabolism, prediabetes, undiagnosed diabetes, and known diabetes.
- Results indicated that participants with prediabetes, undiagnosed diabetes, and known diabetes had significantly lower total gray matter volume compared to those with normal glucose metabolism, suggesting that high blood sugar levels can harm brain integrity even before diabetes is officially diagnosed.
Purpose: The human primary auditory cortex is located in the Heschl's gyrus (HG). To assess the intrinsic MR property in the gray matter of the HG (GM-HG) with T1 and T2 values using a commercially available MR fingerprinting (MRF) technique.
Methods: The subjects were 10 healthy volunteers (with 20 HGs; mean age, 31.
Background: Synthetic magnetic resonance imaging (SyMRI) enables to reformat various images by adjusting the MR parameters.
Purpose: To investigate whether customization of the repetition time (TR), echo time (TE), and inversion time (TI) in SyMRI could improve the visualization of subthalamic nucleus (STN).
Material And Methods: We examined five healthy volunteers using both coronal SyMRI and quantitative susceptibility mapping (QSM), seven patients with Parkinson's disease (PD) using coronal SyMRI, and 15 patients with PD using coronal QSM.
Background: Cerebral ventriculomegaly is an abnormal feature characteristic of myotonic dystrophy type 1 (DM1). This retrospective study investigated the morphologic changes accompanied by ventriculomegaly in DM1 on brain MRI.
Methods: One hundred and twelve adult patients with DM1 and 50 sex- and age-matched controls were assessed.
Rationale And Objectives: We evaluated the availability of cytological diagnosis with outer cannula washing solution (C-OCWS) as a clinical diagnostic tool for computed tomography (CT)-guided needle biopsy.
Materials And Methods: We retrospectively assessed 109 consecutive patients (71 males, 38 females; median age 68 years), who underwent CT-guided needle biopsy. In all patients, the specimens sampled by the inner needle were used for histological diagnosis, and those taken from the outer cannula were rinsed with 0.
Article Synopsis
- The study aimed to find out if arterial spin labeling (ASL) can help distinguish between high signals in MR angiography (MRA) caused by reverse blood flow and those caused by arteriovenous shunting.
- Two radiologists analyzed data from 364 cases without arteriovenous shunting and 13 cases with dural arteriovenous fistula (DAVF) to compare signals on MRA and ASL.
- Results showed that ASL effectively differentiates reversal of venous flow from DAVF, although it may present false positives in some cases, particularly related to jugular vein flow.