Publications by authors named "Yoshiaki Yasumoto"
Validation of the SIMIND simulation code using the myocardial phantom HL.
Biomed Phys Eng Express
December 2024
Article Synopsis
- This study evaluates the effectiveness of SIMIND, a Monte Carlo simulation tool, as an alternative for modeling nuclear medicine experiments, specifically using a cardiac phantom to mimic human heart structures.
- Both simulated and experimental data were analyzed, focusing on various energy windows and regions of interest (ROIs), revealing that SIMIND produced favorable results with relative errors under 10% in most cases, although some areas showed larger discrepancies.
- The findings suggest that while SIMIND can effectively simulate nuclear medicine experiments, accuracy may be compromised in certain scenarios, particularly in low and high-energy subwindows.
[Validation of Quantitative Accuracy and Variability in Lu Imaging Using Monte Carlo Simulation].
Nihon Hoshasen Gijutsu Gakkai Zasshi
June 2024
Purpose: To predict side effects and optimize injection doses in the dosimetry of Lu imaging, highly accurate quantitative SPECT images are required. Monte Carlo simulations were performed to verify the accuracy and variability of quantitative values for Lu imaging under various imaging conditions.
Methods: SPECT data of NEMA body phantom were assumed to simulate intrahepatic tumors 6 h after administration of 7.
[Three-dimensional Quantitative Evaluation Method in I-MIBG Myocardial SPECT-CT].
Nihon Hoshasen Gijutsu Gakkai Zasshi
January 2023
Article Synopsis
- - The study aims to differentiate neurodegenerative diseases by using I-metaiodobenzylguanidine (MIBG) and evaluating the myocardial standardized uptake value (SUV) for accuracy.
- - A 17-segment polar map of the heart was created from SPECT-CT images, optimizing the reconstruction conditions to achieve reliable quantitative values, with comparisons made to the heart-to-mediastinum (H/M) ratio.
- - Results indicated that the myocardial SUV gave slightly more accurate quantitative values than the H/M ratio, and using optimal reconstruction parameters allows for consistent assessment of myocardial uptake.
During examinations and/or treatment, a dentist in the examination room needs to view images with a proper display system. However, they cannot operate the image display system by hands, because dentists always wear gloves to be kept their hands away from unsanitized materials. Therefore, we developed a new image operating system that uses a motion sensor.
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