Publications by authors named "K Ishizaka"
Ultrafast electron diffraction/microscopy technique enables us to investigate the nonequilibrium dynamics of crystal structures in the femtosecond-nanosecond time domain. However, the electron diffraction intensities are in general extremely sensitive to the excitation errors (i.e.
View Article and Find Full Text PDFAssessment of accuracy and repeatability of quantitative parameter mapping in MRI.
Radiol Phys Technol
December 2024
Article Synopsis
- The study assessed the accuracy and consistency of T1, T2*, and proton density values from quantitative parameter mapping (QPM) using the ISMRM/NIST MRI system phantom and compared findings with computer simulations.
- Researchers compared QPM-derived relaxation times and proton density against reference values from the phantom and traditional methods to validate their results.
- The results indicated a strong correlation between QPM values and reference measurements, with simulations aligning closely with actual scan variations, suggesting minimal influence from factors other than noise.
Treatment Selection and Characteristics of Patients With Preiser Disease.
J Hand Surg Glob Online
July 2024
Purpose: Preiser disease is difficult to diagnose and treat because of its unclear pathophysiology. Although both nonsurgical treatment and surgical treatment for Preiser disease have been reported, there is no consensus on the optimal treatment because of its rarity. The purpose of this study was to investigate the relationship between treatment selection and characteristics of patients with Preiser disease.
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- This study aimed to evaluate how well lenticulostriate arteries (LSAs) can be seen using advanced imaging techniques, specifically comparing deep learning-based reconstruction with traditional methods.
- It involved five healthy volunteers and analyzed high-resolution images with varying levels of data reduction to assess the visibility and quality of LSAs as recognized by radiologists.
- Results showed that deep learning reconstruction improved the visibility and quality of LSAs compared to conventional methods, particularly at higher data reduction levels, making it a potentially better option for medical imaging.
Purpose: Prolonged scanning of time-resolved 3D phase-contrast MRI (4D flow MRI) limits its routine use in clinical practice. An echo-planar imaging (EPI)-based sequence and compressed sensing can reduce the scan duration. We aimed to determine the impact of EPI for 4D flow MRI on the scan duration, image quality, and quantitative flow metrics.
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