Yasutaka Ichikawa
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View article: The Petrosquamosal Sinus: A Venous Anomaly of Surgical Importance in Mastoidectomy
The Petrosquamosal Sinus: A Venous Anomaly of Surgical Importance in Mastoidectomy Open
View article: Postnatal Morphometric Development and Variability of the Posterior Canaliculus: An Analysis in a Japanese Population Using Photon-Counting Detector Computed Tomography
Postnatal Morphometric Development and Variability of the Posterior Canaliculus: An Analysis in a Japanese Population Using Photon-Counting Detector Computed Tomography Open
Objective The posterior canaliculus (PC) is a critical landmark in otologic surgery, but a quantitative in vivo characterization of its postnatal development is lacking. This study aimed to utilize the ultra-high spatial resolution of phot…
View article: Radiological Prevalence of Superior Semicircular Canal Dehiscence with Ultra-High-Resolution Photon-Counting Detector CT: A Close Correlation with Anatomic Findings
Radiological Prevalence of Superior Semicircular Canal Dehiscence with Ultra-High-Resolution Photon-Counting Detector CT: A Close Correlation with Anatomic Findings Open
Purpose To determine the radiological prevalence of superior semicircular canal (SSC) dehiscence in a Japanese cohort using ultra-high-resolution (0.2 mm slice thickness) photon-counting detector CT (PCD-CT) and compare it with historical …
View article: Low-tube-potential ultra-high-resolution coronary CTA with photon-counting detector CT for stent evaluation: a comparative feasibility study
Low-tube-potential ultra-high-resolution coronary CTA with photon-counting detector CT for stent evaluation: a comparative feasibility study Open
Objectives This study aimed to evaluate the feasibility of low-tube-potential ultra-high-resolution (UHR) coronary CT angiography (CCTA) using photon-counting detector CT (PCD-CT) in comparison to low-tube-potential CCTA using energy-integ…
View article: Assessing Cardiomyocyte DNA Damage Using Cardiovascular Magnetic Resonance T1 Mapping
Assessing Cardiomyocyte DNA Damage Using Cardiovascular Magnetic Resonance T1 Mapping Open
Native T1 mapping effectively detects DNA damage and fibrosis, revealing different pathophysiological mechanisms behind the increased native T1 and ECV. A disproportionate increase in native T1 relative to …
View article: Impact of tailored feedback on optimization and radiation dose reduction in coronary CT angiography: a comparative survey between 2021 and 2023 in Mie prefecture
Impact of tailored feedback on optimization and radiation dose reduction in coronary CT angiography: a comparative survey between 2021 and 2023 in Mie prefecture Open
View article: Computerized Attenuation Correction of Liver SPECT Images Using Extended 3D-pix2pix Model with Bidirectional Learning
Computerized Attenuation Correction of Liver SPECT Images Using Extended 3D-pix2pix Model with Bidirectional Learning Open
View article: Validation of quantitative perfusion CMR employing deconvolution techniques with tofts, modified Tofts and Fermi function models against 15O-water PET
Validation of quantitative perfusion CMR employing deconvolution techniques with tofts, modified Tofts and Fermi function models against 15O-water PET Open
View article: Development of a deep learning algorithm for detecting significant coronary artery stenosis in whole-heart coronary magnetic resonance angiography
Development of a deep learning algorithm for detecting significant coronary artery stenosis in whole-heart coronary magnetic resonance angiography Open
We developed a DL algorithm offering high diagnostic accuracy for detecting significant coronary artery stenosis on CMRA. Our proposed DL algorithm appears to be an effective tool for assisting inexperienced observers to accurately detect …
View article: The Usefulness of the Air Hole Phantom for Evaluating Z-resolution and Geometric Distortion in Digital Breast Tomosynthesis
The Usefulness of the Air Hole Phantom for Evaluating Z-resolution and Geometric Distortion in Digital Breast Tomosynthesis Open
Currently, the quality control of digital breast tomosynthesis (DBT) functionality in breast X-ray equipment is not adequately implemented. In particular, DBT involves reconstruction, so depth resolution and distortion need to be evaluated…
View article: A case of sclerosing angiomatoid nodular transformation with central calcification
A case of sclerosing angiomatoid nodular transformation with central calcification Open
View article: Utility of quantitative assessment of Tc-99m-diethylenetriamine-penta-acetic acid-galactosyl human serum albumin SPECT/CT in the identification of severe liver fibrosis: its complementary diagnostic value with other liver function indices
Utility of quantitative assessment of Tc-99m-diethylenetriamine-penta-acetic acid-galactosyl human serum albumin SPECT/CT in the identification of severe liver fibrosis: its complementary diagnostic value with other liver function indices Open
Purpose To evaluate the value of Tc-99m-diethylenetriamine-penta-acetic acid-galactosyl human serum albumin (99mTc-GSA) single photon emission computed tomography (SPECT) for assessing liver fibrosis, and to assess its complemen…
View article: Ultra-low-dose coronary computed tomography angiography using photon-counting detector computed tomography
Ultra-low-dose coronary computed tomography angiography using photon-counting detector computed tomography Open
Aims Photon-counting detector computed tomography (PCD-CT), which allows the exclusion of electronic noise, shows promise for significant dose reduction in coronary CT angiography (CCTA). This study aimed to assess the radiation dose and i…
View article: Effects of Irradiation During Computed Tomography Scanning on the Function of Implantable Cardioverter-defibrillators
Effects of Irradiation During Computed Tomography Scanning on the Function of Implantable Cardioverter-defibrillators Open
The effect of irradiation during computed tomography (CT) imaging on implantable cardioverter-defibrillators (ICDs) has not been fully evaluated in various settings. The purposes of this study were to evaluate the occurrence of electromagn…
View article: Rheumatoid arthritis disease activity significantly impacts on the severity of interstitial lung disease
Rheumatoid arthritis disease activity significantly impacts on the severity of interstitial lung disease Open
View article: Ultra-High Spatial Resolution Images of the Temporal Bone Obtained With a Newly Released Photon-Counting Detector Computed Tomography
Ultra-High Spatial Resolution Images of the Temporal Bone Obtained With a Newly Released Photon-Counting Detector Computed Tomography Open
View article: Epipericardial fat necrosis diagnosed by cardiac CT in a patient with apical hypertrophic cardiomyopathy
Epipericardial fat necrosis diagnosed by cardiac CT in a patient with apical hypertrophic cardiomyopathy Open
View article: Rheumatoid arthritis disease activity significantly impacts on the severity of interstitial lung disease.
Rheumatoid arthritis disease activity significantly impacts on the severity of interstitial lung disease. Open
Objectives: Rheumatoid arthritis (RA) related interstitial lung disease (ILD) impacts on the treatment strategy and its prognosis in patients with RA. However, the relationship between RA disease activity and the severity of comorbid ILD h…
View article: Erratum for: Clinical Validation of the Accuracy of Absolute Myocardial Blood Flow Quantification with Dual-Source CT Using <sup>15</sup>O-Water PET
Erratum for: Clinical Validation of the Accuracy of Absolute Myocardial Blood Flow Quantification with Dual-Source CT Using <sup>15</sup>O-Water PET Open
View article: Utility of quantitative analysis of 99mTc-GSA SPECT/CT in the evaluation of liver fibrosis: comparison with conventional assessment on planar images and its complementary diagnostic value with other liver function indices
Utility of quantitative analysis of 99mTc-GSA SPECT/CT in the evaluation of liver fibrosis: comparison with conventional assessment on planar images and its complementary diagnostic value with other liver function indices Open
Objective To evaluate the potential value of quantitative Tc-99m-diethylenetriamine-penta-acetic acid-galactosyl human serum albumin ( 99m Tc-GSA) SPECT in the assessment of liver fibrosis compared to a conventional index based on planar i…
View article: Development of Computer-aided Detection of Significant Coronary Artery Stenosis in Whole-heart Coronary MRA Using Deep Convolutional Neural Network
Development of Computer-aided Detection of Significant Coronary Artery Stenosis in Whole-heart Coronary MRA Using Deep Convolutional Neural Network Open
View article: Prognostic Role of Interim F-18 Fluorodeoxyglucose Positron Emission Tomography-Computed Tomography During Chemoradiation Therapy in Patients with Hypopharyngeal Squamous Cell Carcinoma
Prognostic Role of Interim F-18 Fluorodeoxyglucose Positron Emission Tomography-Computed Tomography During Chemoradiation Therapy in Patients with Hypopharyngeal Squamous Cell Carcinoma Open
View article: Evaluation of Thoracic Endovascular Repair for the Treatment of Type B Aortic Dissection Complicated by Malperfusion
Evaluation of Thoracic Endovascular Repair for the Treatment of Type B Aortic Dissection Complicated by Malperfusion Open
Objectives: This study aims to investigate the efficacy of thoracic endovascular aortic repair (TEVAR) for type B aortic dissection (TBAD) complicated by malperfusion. Methods: This retrospective study included patients who u…
View article: Mixed epithelial and stromal tumor of the kidney with long-term imaging follow-up
Mixed epithelial and stromal tumor of the kidney with long-term imaging follow-up Open
Mixed epithelial and stromal tumor (MEST) of the kidney is a rare benign tumor with malignant potential, and is characterized by epithelial and stromal proliferation with a variety of cellularity and growth pattern. MEST of the kidney is o…
View article: Effect of Gaussian Smoothing Filter Size for CT-Based Attenuation Correction on Quantitative Assessment of Bone SPECT/CT: A Phantom Study
Effect of Gaussian Smoothing Filter Size for CT-Based Attenuation Correction on Quantitative Assessment of Bone SPECT/CT: A Phantom Study Open
View article: Application of Deep Learning-Based Denoising Technique for Radiation Dose Reduction in Dynamic Abdominal CT: Comparison with Standard-Dose CT Using Hybrid Iterative Reconstruction Method
Application of Deep Learning-Based Denoising Technique for Radiation Dose Reduction in Dynamic Abdominal CT: Comparison with Standard-Dose CT Using Hybrid Iterative Reconstruction Method Open
View article: Associating the Severity of Emphysema with Coronary Flow Reserve and Left Atrial Conduit Function for the Emphysema Patients with Known or Suspected Coronary Artery Disease
Associating the Severity of Emphysema with Coronary Flow Reserve and Left Atrial Conduit Function for the Emphysema Patients with Known or Suspected Coronary Artery Disease Open
LA conduit function independently associates with emphysema severity in the emphysema patients with known or suspected CAD after adjusting age, sex, smoking, and the CMR indexes including CFR. These findings suggest that impairment of LA f…
View article: Chronic recurrent multifocal osteomyelitis mimicking migraine
Chronic recurrent multifocal osteomyelitis mimicking migraine Open
► Chronic recurrent multifocal osteomyelitis (CRMO) is a rare autoimmune skeletal disorder, primarily affecting children and adolescents, with a female predominance.► Patients with CRMO may also be misdiagnosed with migraine if they have t…
View article: Clinical Validation of the Accuracy of Absolute Myocardial Blood Flow Quantification with Dual-Source CT Using <sup>15</sup>O-Water PET
Clinical Validation of the Accuracy of Absolute Myocardial Blood Flow Quantification with Dual-Source CT Using <sup>15</sup>O-Water PET Open
Underestimation of MBF by CT was successfully corrected with a correction method that was based on contrast kinetics in the myocardium.Keywords: CT, CT-Perfusion, PET, Cardiac, Heart Supplemental material is available for this ar…
View article: Long-term prognostic value of whole-heart coronary magnetic resonance angiography
Long-term prognostic value of whole-heart coronary magnetic resonance angiography Open