-
Article
New image-restoration method using a simultaneous algebraic reconstruction technique: comparison with the Richardson–Lucy algorithm
We developed a new image-restoration method that incorporates the point spread function (PSF) into the simultaneous algebraic reconstruction technique (SART-PSF). Additionally, through simulation studies, we i...
-
Article
Open AccessLongitudinal observations of progressive cardiac dysfunction in a cardiomyopathic animal model by self-gated cine imaging based on 11.7-T magnetic resonance imaging
The purpose of this study was to longitudinally assess left ventricular function and wall thickness in a hamster model of cardiomyopathy using 11.7-T magnetic resonance imaging (MRI). MRI were performed for si...
-
Article
Differentiation of myocardial ischemia and infarction assessed by dynamic computed tomography perfusion imaging and comparison with cardiac magnetic resonance and single-photon emission computed tomography
To evaluate the feasibility of myocardial blood flow (MBF) by computed tomography from dynamic CT perfusion (CTP) for detecting myocardial ischemia and infarction assessed by cardiac magnetic resonance (CMR) o...
-
Article
Factors affecting the chemical exchange saturation transfer of Creatine as assessed by 11.7 T MRI
Chemical exchange saturation transfer (CEST) is a new contrast enhancement approach for imaging exogenous or endogenous substances such as creatine (Cr), amide protons, and glutamate in the human body. An incr...
-
Article
Open AccessRadiotherapy treatment planning with contrast-enhanced computed tomography: feasibility of dual-energy virtual unenhanced imaging for improved dose calculations
In radiotherapy treatment planning, intravenous administration of an iodine-based contrast agent during computed tomography (CT) improves the accuracy of delineating target volumes. However, increased tissue a...
-
Article
Experimental and simulation studies on the behavior of signal harmonics in magnetic particle imaging
Our purpose in this study was to investigate the behavior of signal harmonics in magnetic particle imaging (MPI) by experimental and simulation studies. In the experimental studies, we made an apparatus for MP...
-
Article
Three-dimensional topographical variation of femoral cartilage T2 in healthy volunteer knees
Quantitative knee cartilage T2 assessment on limited two-dimensional midsagittal or midcoronal planes may be insufficient to assess variations in normal cartilage composition. The purpose of this work was to r...
-
Article
An empirical mathematical model applied to quantitative evaluation of thioacetamide-induced acute liver injury in rats by use of dynamic contrast-enhanced computed tomography
Our purpose in this study was to apply an empirical mathematical model (EMM) to the quantitative evaluation of thioacetamide (TAA)-induced acute liver injury in rats by use of dynamic contrast-enhanced compute...
-
Article
Visualization of mouse spinal cord microscopic structures by use of ex vivo quantitative micro-CT images
Histologic methods are destructive and provide only two-dimensional images, whereas three-dimensional information is difficult to obtain. Simple and noninvasive techniques to make up for the shortcomings of hi...
-
Article
Usefulness of extent analysis for statistical parametric map** with asymmetry index using inter-ictal FGD-PET in mesial temporal lobe epilepsy
Inter-ictal 18F-2-fluoro-deoxy-d-glucose-positron emission tomography (FDG-PET) is widely used for preoperative evaluation to identify epileptogenic zones in patients with temporal lobe epilepsy. In this study, w...
-
Article
Usefulness of a dual-input single-compartment model for quantitative evaluation of thioacetamide-induced acute liver injury in rats using dynamic contrast-enhanced computed tomography
We undertook this study to investigate the usefulness of a dual-input single-compartment model for evaluating thioacetamide (TAA)-induced acute liver injury in rats by use of dynamic contrast-enhanced computed...
-
Article
Investigation of protective effect of hydrogen-rich water against cisplatininduced nephrotoxicity in rats using blood oxygenation level-dependent magnetic resonance imaging
The aim of this study was to assess the mechanism of the protective effect of hydrogen-rich water (HW) against cisplatin (CP)-induced nephrotoxicity in rats using blood oxygenation level-dependent (BOLD) magne...
-
Article
Simulation and experimental studies on magnetic hyperthermia with use of superparamagnetic iron oxide nanoparticles
Our purpose of this study was to present simulation and experimental studies on magnetic hyperthermia (MH) with use of an alternating magnetic field (AMF) and superparamagnetic iron oxide nanoparticles (Resovist®
-
Article
Variation in supratentorial cerebrospinal fluid production rate in one day: measurement by nontriggered phase-contrast magnetic resonance imaging
Measuring the cerebrospinal fluid (CSF) production rate is important for understanding the physiology related to normal conditions and neurological disorders. Triggered phase-contrast magnetic resonance imagin...
-
Article
Investigation of optimal viewing size for detecting nodular ground-glass opacity on high-resolution computed tomography with cine-mode display
We evaluated the effect of the displayed image sizes on observers’ ability to detect nodular ground-glass opacity (n-GGO) on CT and investigated the optimal viewing size for soft-copy reading at CT screening f...
-
Article
Improvement of image resolution of brain SPECT by use of the wide-angle offset acquisition method
Cerebral SPECT images require high spatial and contrast resolution for precise evaluation of the abnormal tracer distribution in the brain. A shorter data acquisition time is preferable so that artifacts due t...
-
Article
Measurement of manganese content in various organs in rats with or without glucose stimulation
Our purpose in this study was to assess the manganese (Mn) content in various organs in rats with or without glucose stimulation in vivo and in vitro by using magnetic resonance imaging (MRI) and polarized Zee...
-
Article
Peri-infarct dysfunction in post-myocardial infarction: assessment of 3-T tagged and late enhancement MRI
To determine LV function at different distances from myocardial infarction (MI) by using 3-T tagged MRI and late gadolinium enhancement (LGE).
-
Article
Experimental verification of age-dependent cisplatin-induced nephrotoxicity in rats using dynamic contrast-enhanced computed tomography
The aim of this study was to investigate age-dependent cisplatin-induced nephrotoxicity in rats using dynamic contrast-enhanced computed tomography (DCE-CT).
-
Article
Patient setup verification procedure for a portal image in a computed radiography system with a high-resolution liquid-crystal display monitor
In our conventional visual inspection for setup verification, we have routinely used a console monitor of a CR system and a monitor of a treatment-planning system (i.e., the separate-monitor method) in order t...
