Performance evaluation of OSEM reconstruction algorithm incorporating three-dimensional distance-dependent resolution compensation for brain SPECT: a …
T Yokei, H Shinohara, H Onishi - Annals of nuclear medicine, 2002 - Springer
Iterative reconstruction techniques such as an ordered subsets-expectation maximization (OSEM)
algorithm can easily incorporated various physical models of attenuation or scatter. …
algorithm can easily incorporated various physical models of attenuation or scatter. …
Quantitative performance of advanced resolution recovery strategies on SPECT images: evaluation with use of digital phantom models
H Onishi, N Motomura, K Fujino, T Natsume… - … physics and technology, 2013 - Springer
Several resolution recovery (RR) methods have been developed. This study was aimed to
validate the following performance of the advanced RR methods: Evolution™, Astonish™, …
validate the following performance of the advanced RR methods: Evolution™, Astonish™, …
[HTML][HTML] Validation of computed tomography-based attenuation correction of deviation between theoretical and actual values in four computed tomography scanners
N Yada, H Onishi - Asia Oceania Journal of Nuclear Medicine and …, 2016 - ncbi.nlm.nih.gov
Objective (s): In this study, we aimed to validate the accuracy of computed tomography-based
attenuation correction (CTAC), using the bilinear scaling method. Methods: The measured …
attenuation correction (CTAC), using the bilinear scaling method. Methods: The measured …
Evaluation of the impact of carotid artery bifurcation angle on hemodynamics by use of computational fluid dynamics: a simulation and volunteer study
T Saho, H Onishi - Radiological physics and technology, 2016 - Springer
In this study, we evaluated the hemodynamics of carotid artery bifurcation with various
geometries using simulated and volunteer models based on magnetic resonance imaging (MRI). …
geometries using simulated and volunteer models based on magnetic resonance imaging (MRI). …
Characteristics of Silver Ions Exchanged in ZSM-5-Type Zeolite, Aluminosilicate, and SiO2 Samples: In Comparison with the Properties of Copper Ions Exchanged …
Y Kuroda, H Onishi, T Mori, Y Yoshikawa… - The Journal of …, 2002 - ACS Publications
The IR technique in combination with adsorption microcalorimetry was used to picture the
bonding nature of silver ion exchanged or supported on solid materials, such as ZSM-5-type …
bonding nature of silver ion exchanged or supported on solid materials, such as ZSM-5-type …
Impact of thickened liquids on laryngeal movement velocity in patients with dysphagia
Y Nakao, H Onishi, T Haji, O Shiromoto, S Saito… - Dysphagia, 2022 - Springer
Considering that thickened liquids are frequently used for patients with dysphagia, elucidating
their impact on laryngeal dynamics is important. Although studies have investigated the …
their impact on laryngeal dynamics is important. Although studies have investigated the …
Quantitative comparison of hemodynamics in simulated and 3D angiography models of cerebral aneurysms by use of computational fluid dynamics
T Saho, H Onishi - Radiological physics and technology, 2015 - Springer
In this study, we evaluated hemodynamics using simulated models and determined how
cerebral aneurysms develop in simulated and patient-specific models based on medical images…
cerebral aneurysms develop in simulated and patient-specific models based on medical images…
Quantitative analysis of effects of hemodynamic stress on temporal variations of cardiac phases in models of human carotid bulbs
T Saho, H Onishi - Radiological physics and technology, 2017 - Springer
In this study, we evaluated the hemodynamics of carotid artery models with carotid bulbs of
various sizes using computational fluid dynamics (CFD) and the Fluent CFD software. The …
various sizes using computational fluid dynamics (CFD) and the Fluent CFD software. The …
Corneal dose reduction using a bismuth-coated latex shield over the eyes during brain SPECT/CT
N Matsutomo, M Fukunaga, H Onishi… - Journal of Nuclear …, 2017 - Soc Nuclear Med
This study aimed to determine whether a bismuth-coated latex shield (B-shield) could protect
the eyes during brain SPECT/CT. Methods: A shield containing the heavy metal bismuth (…
the eyes during brain SPECT/CT. Methods: A shield containing the heavy metal bismuth (…
Evaluation of a novel normal database with matched SPECT systems and optimal pre-filter parameters for 3D-SSP
H Onishi, N Matsutomo, Y Kai, Y Kangai… - Annals of nuclear …, 2012 - Springer
Purpose A normal perfusion database (NDB) is imperative for the statistical imaging of brain
function. This study validates a novel NDB created under the same injection dose and …
function. This study validates a novel NDB created under the same injection dose and …