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  1. Article

    Open Access

    Prediction of Occurrence of Cerebral Infarction After Successful Mechanical Thrombectomy for Ischemic Stroke in the Anterior Circulation by Arterial Spin Labeling

    The overall goal of our study is to create modified Alberta Stroke Program Early Computed Tomography Score (ASPECTS) determined by the findings on arterial spin labeling imaging (ASL) to predict the prognosis ...

    Masamune Kidoguchi, Ayumi Akazawa, Osamu Komori, Makoto Isozaki in Clinical Neuroradiology (2023)

  2. No Access

    Article

    Extracellular volume fraction obtained by dual-energy CT depicting the etiological differences of liver fibrosis

    To assess etiological differences in extracellular volume fraction (ECV) and evaluate its influence on staging performance.

    Kumi Ozaki, Takashi Ohtani, Shota Ishida, Shohei Higuchi in Abdominal Radiology (2023)

  3. No Access

    Article

    Regional cortical hypoperfusion and atrophy correlate with striatal dopaminergic loss in Parkinson’s disease: a study using arterial spin labeling MR perfusion

    To investigate the relationship of the striatal dopamine transporter density to changes in the gray matter (GM) volume and cerebral perfusion in patients with Parkinson’s disease (PD).

    Yuki Kitazaki, Masamichi Ikawa, Tomohisa Yamaguchi, Soichi Enomoto in Neuroradiology (2023)

  4. No Access

    Article

    Arterial spin labeling imaging for the detection of cerebral blood flow asymmetry in patients with corticobasal syndrome

    Corticobasal syndrome (CBS) and Parkinson’s disease (PD) both present with asymmetrical extrapyramidal symptoms, often leading to a diagnostic dilemma. Patients with CBS frequently show cerebral blood flow (CB...

    Tomohisa Yamaguchi, Masamichi Ikawa, Souichi Enomoto, Norimichi Shirafuji in Neuroradiology (2022)

  5. No Access

    Article

    Acquisition count dependence of the specific binding ratio in 123I-FP-CIT SPECT

    In the [123I]FP-CIT single-photon emission computed tomography (SPECT) examination, the specific binding ratio (SBR), calculated from the ratio of the striatal specific to extra-striatal background non-specific b...

    Akinobu Kita, Hidehiko Okazawa, Katsuya Sugimoto, Ryoto Kaido in Annals of Nuclear Medicine (2021)

  6. Article

    Open Access

    Changes in magnetic resonance imaging relaxation time on postmortem magnetic resonance imaging of formalin-fixed human normal heart tissue

    Postmortem magnetic resonance imaging (MRI) has been used to investigate the cause of death, but due to time constraints, it is not widely applied to the heart. Therefore, MRI analysis of the heart after forma...

    Kiyokadzu Ebata, Sakon Noriki, Kunihiro Inai, Hirohiko Kimura in BMC Medical Imaging (2021)

  7. No Access

    Article

    Pearls and pitfalls of imaging features of pancreatic cystic lesions: a case-based approach with imaging–pathologic correlation

    A variety of neoplastic and non-neoplastic lesions of the pancreas can present with a predominantly cystic architecture. These lesions are increasingly being detected as incidental findings on routine cross-se...

    Kumi Ozaki, Hiroshi Ikeno, Yasuharu Kaizaki, Kazuya Maeda in Japanese Journal of Radiology (2021)

  8. No Access

    Article

    Primary hepatic diffuse large B-cell lymphoma presenting unusual imaging features

    Primary hepatic lymphomas are frequently misdiagnosed, due to their rarity and non-specific clinical manifestations. As these tumors can be successfully treated with chemotherapy and/or radiotherapy, early rec...

    Kumi Ozaki, Hiroshi Ikeno, Kenji Koneri in Clinical Journal of Gastroenterology (2020)

  9. No Access

    Article

    Comparison of diagnostic accuracy between [18F]FDG PET/MRI and contrast-enhanced MRI in T staging for oral tongue cancer

    Integrated PET/MRI with [18F]FDG is advantageous in that it enables simultaneous PET and MR imaging with higher soft-tissue contrast, multiplanar image acquisition, and functional imaging capability without using...

    Masafumi Kanno, Tetsuya Tsujikawa, Norihiko Narita, Yumi Ito in Annals of Nuclear Medicine (2020)

  10. No Access

    Article

    Morphometric changes and imaging findings of diffuse liver disease in relation to intrahepatic hemodynamics

    Diffuse hepatic diseases have a variety of etiologies, with each showing characteristic morphometric changes. These changes are closely related to micro- and macro-level intrahepatic hemodynamics, in addition ...

    Kumi Ozaki, Kazuto Kozaka, Yasuo Kosaka, Hirohiko Kimura in Japanese Journal of Radiology (2020)

  11. Article

    Open Access

    Integrated [18F]FDG PET/MRI demonstrates the iron-related bone-marrow physiology

    We identified predictors for bone-marrow [18F]FDG uptake and MR signals among complete blood count, C-reactive protein (CRP), and anthropometric factors, and demonstrated the bone-marrow physiology using integrat...

    Tetsuya Tsujikawa, Hiroshi Oikawa, Toshiki Tasaki, Naoko Hosono in Scientific Reports (2020)

  12. Article

    FDG-PET/CT imaging findings of hepatic tumors and tumor-like lesions based on molecular background

    The usefulness of whole-body 18-fluoro-2-deoxyglucose (FDG)-fluorodeoxyglucose positron emission (PET)/computed tomography (CT) is established for assessment of disease staging, detection of early disease recu...

    Kumi Ozaki, Kenichi Harada, Noboru Terayama in Japanese Journal of Radiology (2020)

  13. No Access

    Article

    A case of focal confluent hepatic fibrosis in the patient with hepatitis C virus-related liver cirrhosis: a mimic of cholangiolocellular carcinoma

    During routine ultrasound examination, a hyperechoic mass was detected in the anterior segment of the liver in an 80-year-old woman with hepatitis C virus-related cirrhosis. Computed tomography and magnetic re...

    Kumi Ozaki, Masaki Takeshita, Katsuhiko Saito, Hirohiko Kimura in Abdominal Radiology (2020)

  14. No Access

    Article

    Intravascular signal suppression and microvascular signal map** using delays alternating with nutation for tailored excitation (DANTE) pulse for arterial spin labeling perfusion imaging

    To optimize the delays alternating with nutation for tailored excitation (DANTE) pulse as a vascular crushing gradient to eliminate macro-and micro-vascular signals and to generate a macrovascular space-relate...

    Yasuhiro Fujiwara, Hirohiko Kimura in Magnetic Resonance Materials in Physics, B… (2020)

  15. Article

    Open Access

    Evaluation of intraocular gas using magnetic resonance imaging after pars plana vitrectomy with gas tamponade for rhegmatogenous retinal detachment

    We used magnetic resonance imaging (MRI) to assess how a patient’s posture affects intraocular gas changes and whether the postoperative prone position is required after pars plana vitrectomy (PPV) with gas ta...

    Makoto Gozawa, Masayuki Kanamoto, Shota Ishida, Yoshihiro Takamura in Scientific Reports (2020)

  16. No Access

    Article

    The use of combined T2-weighted and FLAIR synthetic magnetic resonance images to improve white matter region contrast: a feasibility study

    Synthetic magnetic resonance imaging (MRI) allows the production of images with any contrast from a single scan after quantification. The combined T2-weighted image (T2WI) and fluid-attenuated inversion recovery ...

    Yasuhiro Fujiwara, Yumi Inoue, Masayuki Kanamoto in Radiological Physics and Technology (2019)

  17. No Access

    Article

    Evaluation of retained products of conception using pulsed continuous arterial spin-labeling MRI: clinical feasibility and initial results

    We evaluated the vascularity of retained products of conception (RPOC) using arterial spin-labeling magnetic resonance imaging (ASL-MRI) to clarify the clinical feasibility of this approach.

    Nobuyuki Kosaka, Yasuhiro Fujiwara in Magnetic Resonance Materials in Physics, B… (2018)

  18. No Access

    Article

    Pseudo-continuous arterial spin labeling MR images in Warthin tumors and pleomorphic adenomas of the parotid gland: qualitative and quantitative analyses and their correlation with histopathologic and DWI and dynamic contrast enhanced MRI findings

    We investigated the correlation between tumor blood flow (TBF) and histopathologic features of Warthin tumors (WTs) and pleomorphic adenomas (PAs) to determine the TBF in the differential diagnosis of these tu...

    Tatsuya Yamamoto, Hirohiko Kimura, Kuniyoshi Hayashi, Yoshiaki Imamura in Neuroradiology (2018)

  19. No Access

    Article

    Assessment of intratumor heterogeneity in mesenchymal uterine tumor by an 18F-FDG PET/CT texture analysis

    The aim of this study was to retrospectively evaluate the clinical significance of 18F-FDG PET/CT textural features for discriminating uterine sarcoma from leiomyoma.

    Tetsuya Tsujikawa, Makoto Yamamoto, Kunihiro Shono in Annals of Nuclear Medicine (2017)

  20. No Access

    Article

    18F-FDG PET radiomics approaches: comparing and clustering features in cervical cancer

    The aims of our study were to find the textural features on 18F-FDG PET/CT which reflect the different histological architectures between cervical cancer subtypes and to make a visual assessment of the associatio...

    Tetsuya Tsujikawa, Tasmiah Rahman, Makoto Yamamoto in Annals of Nuclear Medicine (2017)

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