Publications by authors named "Ryuya Yoshida"
Purpose: To investigate whether virtual-monoenergetic images (VMI) from dual-layer spectral-detector computed tomography (DLCT) improve right adrenal vein (RAV) assessment before adrenal venous sampling (AVS), and portal-venous-phase (PVP) images alone can replace conventional multiphase CT combining late-arterial phase (LAP) and PVP.
Methods: Sixty-three patients with primary aldosteronism who underwent LAP and PVP DLCT before AVS were retrospectively analyzed. Conventional polyenergetic-images (PEI) and VMI at 40-70 keV (VMI) were reconstructed.
Objectives: To investigate whether multiphase hepatic CT can predict liver function measured with indocyanine-green-retention test (ICG-R15) and identify patients with severe liver dysfunction contraindicating major hepatectomy, defined as ICG-R15 ≥ 20%, compared to technetium--galactosyl serum albumin (Tc-GSA) scintigraphy.
Materials And Methods: This retrospective study included 118 patients (84 men, mean age, 69.4 ± 11.
Objectives: To compare the diagnostic performance of conventional non-contrast CT, dual-energy spectral CT, and chemical-shift MRI (CS-MRI) in discriminating lipid-poor adenomas (> 10-HU on non-contrast CT) from non-adenomas.
Methods: A total of 110 patients (69 men; 41 women; mean age 66.5 ± 13.
Article Synopsis
- This study investigated how different radiation doses and focal spot sizes affect the image quality of various cardiac CT reconstruction algorithms, particularly focusing on super-resolution deep-learning reconstruction (SR-DLR).
- It used a specialized phantom and evaluated images for noise properties, spatial resolution, and overall quality across multiple reconstruction methods including iterative reconstruction and normal-resolution DLR.
- Results showed that SR-DLR provided the best image quality with the lowest noise and highest spatial resolution at a radiation dose of 4.3 mGy, suggesting it enables better diagnostic capabilities while reducing radiation exposure.
Article Synopsis
- The study aimed to compare the effectiveness of multiphase hepatic CT parameters and chemical-shift MRI in distinguishing between lipid-poor adrenal adenomas and metastases in patients with hepatocellular carcinoma.
- Researchers analyzed data from 104 HCC patients, measuring various CT and MRI parameters, finding that lipid-poor adenomas had significantly different values compared to metastases for multiple parameters.
- Results showed that multiphase hepatic CT, particularly when using a combination of the relative enhancement ratio (RER) and absolute washout ratio (APW), provided better discrimination between adenomas and metastases than CS-MRI.
Chondroitin sulfate-glycyl-prednisolone conjugate (CS-GP) was previously demonstrated to exhibit superior anti-arthritic effects compared to prednisolone (PD) alone. In this study, CS-GP was examined for its pharmacokinetic features and tropism for inflammatory joints using rats with adjuvant-induced arthritis in order to identify the mechanism of the potential enhancement. After intravenous injection (2.
View Article and Find Full Text PDF