全部文献期刊会议图书|学者科研项目
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作者:Kazuhiro Ohtakara , Hajime Monzen ...
来源:[J].Physica Medica(IF 1.167), 2017, Vol.44, pp.205-211Elsevier
摘要:Abstract(#br)Pretreatment intensity-modulated radiotherapy quality assurance is performed using simple rectangular or cylindrical phantoms; thus, the dosimetric errors caused by complex patient-specific anatomy are absent in the evaluation objects. In this study, we construc...
作者:Kazuhiro Ohtakara , Shinya Hayashi ...
来源:[J].Japanese Journal of Radiology(IF 0.73), 2011, Vol.29 (9)Springer
摘要:Abstract(#br) Purpose(#br)The objective of our study was to explore any significant dosimetric differences between different leaf width (3.0 mm vs. 2.5 mm) micro-multileaf collimator (mMLC)-based treatment systems for intracranial stereotactic radiosurgery using dynamic conformal...
作者:Kazuhiro Ohtakara , Hiroaki Hoshi
来源:[J].Medical Dosimetry(IF 1.009), 2015, Vol.40 (3), pp.248-255Elsevier
摘要:Abstract(#br)This study was conducted to ascertain whether homogeneous target dose planning is suitable for stereotactic body radiotherapy (SBRT) of peripheral lung cancer under appropriate breath-holding. For 20 peripheral lung tumors, paired dynamic conformal arc plans wer...
作者:Kazuhiro Ohtakara , Yoshiyuki Itoh
来源:[J].Medical Physics(IF 2.911), 2020, Vol.47 (3), pp.1391-1403Wiley
摘要:Purpose(#br)In the previous treatment planning system (TPS) for CyberKnife (CK), multileaf collimator (MLC)‐based treatment plans could be created only by using the finite‐size pencil beam (FSPB) algorithm. Recently, a new TPS, including the FSPB with lateral scaling option ...
作者:Kazuhiro Ohtakara , Hiroyasu Inada ...
来源:[J].Biochemical and Biophysical Research Communications(IF 2.406), 2000, Vol.272 (3), pp.712-716Elsevier
摘要:Abstract(#br)p21-activated kinase (PAK) and Rho-associated kinase (Rho-kinase) have been shown to induce Ca 2+ -independent contraction of smooth muscle. PAK-induced contraction of Triton-skinned smooth muscle correlates with increased phosphorylation of caldesmon and desmin...
作者:Kazuhiro Ohtakara , Shinya Hayashi ...
来源:[J].Radiotherapy and Oncology(IF 4.52), 2012, Vol.102 (2), pp.198-205Elsevier
摘要:Abstract(#br)Purpose(#br)To compare the positioning accuracy and stability of two distinct noninvasive immobilization devices, a dedicated (D-) and conventional (C-) mask, and to evaluate the applicability of a 6-degrees-of-freedom (6D) correction, especially to the C-mask, based...
作者:Kazuhiro Ohtakara , Takashi Deguchi
来源:[J].Radiotherapy and Oncology(IF 4.52), 2007, Vol.88 (1), pp.115-120Elsevier
摘要:Abstract(#br)Purpose(#br)To compare the dosimetric results between MRI-based and TRUS-based preplanning in permanent prostate brachytherapy, and to estimate the accuracy of MRI-based preplanning by comparing with CT/MRI fusion-based postimplant dosimetry.(#br)Methods and material...
作者:Kazuhiro Ohtakara , Toshiharu Miyoshi ...
来源:[J].International Journal of Radiation Oncology, Biology, Physics(IF 4.524), 2007, Vol.69 (2), pp.614-618Elsevier
摘要:Purpose(#br)To investigate the time course of prostatic edema and the effect on the dose–volume histograms of the prostate for patients treated with brachytherapy.(#br)Methods and Materials(#br)A total of 74 patients with prostate cancer were enrolled in this prospective stu...
作者:Kazuhiro Ohtakara , Shinya Hayashi ...
来源:[J].Journal of Neuro-Oncology(IF 3.115), 2012, Vol.108 (1), pp.201-209Springer
摘要:Abstract(#br)The objective of this study was to investigate the factors that potentially lead to brain radionecrosis (RN) after micromultileaf collimator-based stereotactic radiosurgery (SRS) for brain metastases. We retrospectively evaluated 131 lesions with a minimum follo...
作者:Kazuhiro Ohtakara , Shinya Hayashi ...
来源:[J].Journal of Cancer Research and Clinical Oncology(IF 2.914), 2012, Vol.138 (9), pp.1511-1522Springer
摘要:Abstract(#br) Purpose(#br)To assess the clinical outcomes of single or oligo-fractionated stereotactic radiotherapy (SRT) using dynamic conformal arcs (DCA) for head and neck tumors (HNTs).(#br) Methods(#br)Thirty-four consecutive patients with 35 lesions treated between 200...

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