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List of works by Hiroyuki Okamoto

A dosimetric analysis of intensity-modulated radiation therapy with bone marrow sparing for cervical cancer

scientific article published on 01 September 2014

A dosimetric and centeredness comparison of the conventional and novel endobronchial applicators: A preliminary study

scientific article published on 19 December 2020

A management method for the statistical results of patient-specific quality assurance for intensity-modulated radiation therapy.

scientific article published on 10 November 2016

A multi-institutional observational study on the effects of three-dimensional radiotherapy and weekly 40-mg/m2 cisplatin on postoperative uterine cervical cancer patients with high-risk prognostic factors.

scientific article

A surveillance study of intensity-modulated radiation therapy for postoperative cervical cancer in Japan

scientific article published on 9 April 2015

A total EQD2 greater than 85 Gy for trachea and main bronchus D2cc being associated with severe late complications after definitive endobronchial brachytherapy

scientific article published on 13 October 2015

Advantages and challenges for noninvasive atrial fibrillation ablation

scientific article published on 26 October 2020

After low and high dose-rate interstitial brachytherapy followed by IMRT radiotherapy for intermediate and high risk prostate cancer

scientific article

An overview of the medical-physics-related verification system for radiotherapy multicenter clinical trials by the Medical Physics Working Group in the Japan Clinical Oncology Group-Radiation Therapy Study Group

scientific article published on 29 September 2020

Characterization of the relationship between neutron production and thermal load on a target material in an accelerator-based boron neutron capture therapy system employing a solid-state Li target

scientific article published on 22 November 2019

Circulating exosomal microRNAs as biomarkers of colon cancer.

scientific article

Commissioning of 6 MV medical linac for dynamic MLC-based IMRT on Monte Carlo code GEANT4.

scientific article published on 8 February 2014

Comparison of 18FBPA uptake with 18FDG uptake in cancer patients

scientific article published on 07 December 2019

Configuration analysis of the injection position and shape of the gel spacer in gynecologic brachytherapy

scientific article published on 30 September 2020

Dependence of neutrons generated by 7Li(p,n) reaction on Li thickness under free-air condition in accelerator-based boron neutron capture therapy system employing solid-state Li target

scientific article published on 16 February 2019

Development of quality assurance/quality control web system in radiotherapy

scientific article published in December 2013

Dose calculation accuracies in whole breast radiotherapy treatment planning: a multi-institutional study

scientific article published on 3 February 2015

Dose coverage comparison between "interstitial catheter-only" and "hybrid intracavitary-interstitial brachytherapy" for early stage squamous cell carcinoma of the buccal mucosa.

scientific article published on 31 October 2018

Dose error from deviation of dwell time and source position for high dose-rate 192Ir in remote afterloading system

scientific article

Dose escalation of external beam radiotherapy for high-risk prostate cancer-Impact of multiple high-risk factor.

scientific article published on 19 October 2017

Dose reconstruction technique using non-rigid registration to evaluate spatial correspondence between high-dose region and late radiation toxicity: a case of tracheobronchial stenosis after external beam radiotherapy combined with endotracheal brach

scientific article published on 29 April 2016

Dosimetric effect of the intestinal gas of on-line adaptive stereotactic body radiotherapy on target and critical organs without on-line electron density correction for pancreatic cancer

scientific article published on 22 December 2020

Dosimetric impact of an air passage on intraluminal brachytherapy for bronchus cancer

scientific article published on 07 September 2016

Dosimetric variations due to interfraction organ deformation in cervical cancer brachytherapy.

scientific article

Dummy-run for standardizing plan quality of intensity-modulated radiotherapy for postoperative uterine cervical cancer: Japan Clinical Oncology Group study (JCOG1402)

scientific article published on 29 July 2019

Early-onset dropped head syndrome after radiotherapy for head and neck cancer: dose constraints for neck extensor muscles

scientific article published on 18 December 2015

Erratum: A total EQD2 greater than 85 Gy for trachea and main bronchus D2cc being associated with severe late complications after definitive endobronchial brachytherapy.

scientific article published on 29 April 2016

Establishment of postal audit system in intensity-modulated radiotherapy by radiophotoluminescent glass dosimeters and a radiochromic film.

scientific article

Evaluation of radioactivity in the bodies of mice induced by neutron exposure from an epi-thermal neutron source of an accelerator-based boron neutron capture therapy system

scientific article published in January 2017

How Much Was the Elective Lymph Node Region Covered in Involved-Field Radiation Therapy for Locally Advanced Pancreatic Cancer? Evaluation of Overlap Between Gross Target Volume and Celiac Artery-Superior Mesenteric Artery Lymph Node Regions

scientific article published on 13 September 2019

Image-guided interstitial high-dose-rate brachytherapy for locally recurrent uterine cervical cancer: A single-institution study

scientific article published on 21 December 2017

Importance of the site of positive surgical margin in salvage external beam radiation therapy for biochemical recurrence of prostate cancer after radical prostatectomy.

scientific article

In vivo spatial correlation between (18)F-BPA and (18)F-FDG uptakes in head and neck cancer.

scientific article published on 28 May 2016

Independent assessment of source position for gynecological applicator in high-dose-rate brachytherapy

scientific article published on 19 October 2017

Inter-fractional variations in the dosimetric parameters of accelerated partial breast irradiation using a strut-adjusted volume implant

scientific article published on 01 January 2020

Log-file analysis of accuracy of beam localization for brain tumor treatment by CyberKnife.

scientific article

Long-term Results of External Beam Radiotherapy for Prostate Cancer with Prostate-specific Antigen of More Than 50 ng/ml and Without Evidence of Lymph Node or Distant Metastasis

scientific article published on 01 April 2018

Long-term observations of radiation-induced creatinine clearance reduction and renal parenchymal volume atrophy.

scientific article published on 29 June 2016

Microdosimetric measurements and estimation of human cell survival for heavy-ion beams

scientific article published on October 2006

Microdosimetric study on influence of low energy photons on relative biological effectiveness under therapeutic conditions using 6 MV linac

scientific article published on 01 August 2011

Modeling the detection efficiency of an HP-Ge detector for use in boron neutron capture therapy

scientific article published on 02 April 2017

Monte Carlo modeling of a 60Co MRI-guided radiotherapy system on Geant4 and experimental verification of dose calculation under a magnetic field of 0.35 T

scientific article published on 01 January 2019

Multi-institutional comparison of secondary check of treatment planning using computer-based independent dose calculation for non-C-arm linear accelerators

scientific article published on 23 November 2018

Multi-institutional retrospective analysis of the inhomogeneity correction for radiation therapy of lung cancer.

scientific article published on 24 December 2010

Positional uncertainty of vaginal cuff and feasibility of implementing portable bladder scanner in postoperative cervical cancer patients.

scientific article published in December 2017

Postoperative pelvic intensity-modulated radiation therapy reduced the incidence of late gastrointestinal complications for uterine cervical cancer patients

scientific article published on 01 October 2019

Preparation for the COVID-19 pandemic in the department of radiation oncology in the National Cancer Center Hospital in Tokyo

scientific article published on 14 May 2020

Prognostic impact of immunohistopathologic features in definitive radiation therapy for nasopharyngeal cancer patients

scientific article published on 01 January 2020

Proposed definition of the vaginal cuff and paracolpium clinical target volume in postoperative uterine cervical cancer.

scientific article

Prospective study of postoperative whole breast radiotherapy for Japanese large-breasted women: a clinical and dosimetric comparisons between supine and prone positions and a dose measurement using a breast phantom

scientific article

Questionnaire Survey of Japanese Medical Physicists for Working Conditions in 2014.

scientific article

Radiation protection in radiological imaging: a survey of imaging modalities used in Japanese institutions for verifying applicator placements in high-dose-rate brachytherapy

scientific article published on 19 October 2020

Radiotherapy for gastric lymphoma: a planning study of 3D conformal radiotherapy, the half-beam method, and intensity-modulated radiotherapy

scientific article

Relation between lineal energy distribution and relative biological effectiveness for photon beams according to the microdosimetric kinetic model

scientific article published on 13 December 2010

Salvage High-dose-rate Interstitial Brachytherapy for Pelvic Recurrent Cervical Carcinoma After Hysterectomy.

scientific article published in May 2016

Single-arm confirmatory trial of postoperative concurrent chemoradiotherapy using intensity modulated radiation therapy for patients with high-risk uterine cervical cancer: Japan Clinical Oncology Group study (JCOG1402)

scientific article published on 01 September 2019

Stereotactic body radiation therapy for early-stage non-small-cell lung cancer in octogenarians and older: an alternative treatment

scientific article published on 08 May 2020

The role of interstitial brachytherapy in the management of primary radiation therapy for uterine cervical cancer.

scientific article published on 10 October 2016

The use of hyperbaric oxygen to treat actinic rectal fistula after SpaceOAR use and radiotherapy for prostate cancer: a case report

scientific article published on 14 December 2020

Transvaginal artificial ascites infusion as a spacer in gynecological brachytherapy: a novel technique

scientific article published on 30 October 2020

[Correlation between required quality assurance equipment and radiation therapy institutional level]

[Efforts toward Patient Safety: Development of System and Education of Non-Technical Skill]

scientific article published on 01 January 2018

[Field Survey Results on Output for X-ray Therapeutic Accelerators in Radiotherapy Institutions of Saitama and Tochigi Prefectures.].

scientific article published on 01 January 2007

[Introduction of Quality Indicators into Radiotherapy Departments in Japan]

scientific article published on 01 January 2020

[On-line Adaptive Radiotherapy Using MRI-Guided Technique]

scientific article published on 01 January 2019

[Summary of the Report of Task Group 100 of the AAPM: Application of Risk Analysis Methods to Radiation Therapy Quality Management]

scientific article published on 01 January 2020

¹⁰⁶Ruthenium plaque therapy (RPT) for retinoblastoma.

scientific article published on 9 May 2012

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