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  1. No Access

    Article

    Impact Exploration of Spatiotemporal Feature Derivation and Selection on Machine Learning-Based Predictive Models for Post-Embolization Cerebral Aneurysm Recanalization

    To enhance the performance of machine learning (ML) models for the post-embolization recanalization of cerebral aneurysms, we evaluated the impact of hemodynamic feature derivation and selection method on six ...

    **g Liao, Kouichi Misaki, Jiro Sakamoto in Cardiovascular Engineering and Technology (2024)

  2. Article

    Open Access

    Hemodynamic factor evaluation using computational fluid dynamics analysis for de novo bleb formation in unruptured intracranial aneurysms

    Although bleb formation increases the risk of rupture of intracranial aneurysms, previous computational fluid dynamic (CFD) studies have been unable to identify robust causative hemodynamic factors, due to the...

    Takehiro Uno, Kouichi Misaki, Kazuya Futami, Iku Nambu in Neurological Sciences (2022)

  3. No Access

    Article

    Follow-up study of a patient with early onset cerebral amyloid angiopathy following childhood cadaveric dural graft

    We retrospectively studied the T2 star (T2*)-weighted magnetic resonance imaging (MRI) of a 40-year-old patient diagnosed with symptomatic early-onset cerebral amyloid angiopathy (CAA), occurring 34 years foll...

    Kenji Yoshiki, Genjiro Hirose, Kazuhiko Kumahashi, Yukihiko Kohda in Acta Neurochirurgica (2021)

  4. Article

    Open Access

    Prediction of internal carotid artery aneurysm recurrence by pressure difference at the coil mass surface

    A previous study on computational fluid dynamics reported that a high pressure difference (PD) at the surface of a coil mass is a strong predictor of aneurysm recurrence after coil embolization. PD was calcula...

    Takehiro Uno, Kouichi Misaki, Iku Nambu, Akifumi Yoshikawa, Tomoya Kamide in Neuroradiology (2021)

  5. No Access

    Article

    Radiological and endocrinological evaluations with grading of hypothalamic perifocal edema caused by craniopharyngiomas

    Hypophysial and hypothalamic dysfunction caused by craniopharyngioma is a serious problem despite the progress of surgical approaches and techniques. Perifocal edema induced by craniopharyngioma could be specu...

    Yasuhiko Hayashi, Yasuo Sasagawa, Masahiro Oishi, Kouichi Misaki in Pituitary (2019)

  6. No Access

    Article

    Inflow hemodynamics evaluated by using four-dimensional flow magnetic resonance imaging and the size ratio of unruptured cerebral aneurysms

    Prediction of the rupture risk is critical for the identification of unruptured cerebral aneurysms (UCAs) eligible for invasive treatments. The size ratio (SR) is a strong morphological predictor for rupture. ...

    Kazuya Futami, Iku Nambu, Tomohiro Kitabayashi, Hiroki Sano in Neuroradiology (2017)

  7. No Access

    Article

    Delayed asymptomatic coil migrations toward different arteries after aneurysmal embolization: case report

    Delayed coil migration after endovascular treatment with detachable coils, particularly several months after treatment, is extremely rare. In this report, the authors describe a 77-year-old female in whom dela...

    Tomoya Kamide, Kouichi Misaki, Iku Nambu, Masanao Mohri in Acta Neurochirurgica (2017)

  8. No Access

    Article

    Pseudoaneurysm formation caused by the withdrawal of a Trevo ProVue stent at a tortuous cerebral vessel: a case report

    This is the first report on the mechanism of pseudoaneurysm formation after withdrawal of a stent retriever. A 79-year-old woman developed cardiogenic embolization of the distal middle cerebral artery (M2). Th...

    Kouichi Misaki, Naoyuki Uchiyama, Masanao Mohri, Tomoya Kamide in Acta Neurochirurgica (2016)

  9. No Access

    Article

    Molecular analysis of a recurrent glioblastoma treated with bevacizumab

    We treated a case of recurrent glioblastoma (GBM) with bevacizumab and assessed its effect biologically. A 55-year-old man with a left frontal lobe GBM was experiencing recurrence 7 months postoperation. We ad...

    Takuya Furuta, Mitsutoshi Nakada, Kouichi Misaki, Yasunori Sato in Brain Tumor Pathology (2014)

  10. No Access

    Article

    Association between carotid plaque composition assessed by multidetector computed tomography and cerebral embolism after carotid stenting

    We aimed to assess the relationship between atherosclerotic carotid plaque composition analyzed using multidetector computed tomography (MDCT) and the appearance of new ischemic lesions detected by diffusion-w...

    Naoyuki Uchiyama, Kouichi Misaki, Masanao Mohri, Takuya Watanabe in Neuroradiology (2012)

  11. No Access

    Article

    MGMT promoter methylation and temozolomide response in choroid plexus carcinoma

    Choroid plexus carcinoma (CPC) is a malignant tumor with a strong tendency to spread along the cerebrospinal fluid pathway. There is no standardized chemotherapy protocol for this rare tumor. We report a 38-ye...

    Kouichi Misaki, Mitsutoshi Nakada, Masanao Mohri, Yutaka Hayashi in Brain Tumor Pathology (2011)