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K. Ohnishi · SciRah

Researcher profile · Semantic Scholar

K. Ohnishi

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K. Ohnishi — researcher profile on SciRah

h-index: 21
Works: 109
Citations: 1,313

Most-cited papers

Pretreatment apparent diffusion coefficient of the primary lesion correlates with local failure in head-and-neck cancer treated with chemoradiotherapy or radiotherapy.
M. Hatakenaka, Katsumasa Nakamura, H. Yabuuchi, Y. Shioyama +9 more
2011International Journal of Radiation Oncology, Biology, Physics113 citations
Semantic Scholar
Radiation-induced rib fractures after hypofractionated stereotactic body radiation therapy: risk factors and dose-volume relationship.
Kaori Asai, Y. Shioyama, Katsumasa Nakamura, Tomonari Sasaki +8 more
2010International Journal of Radiation Oncology, Biology, Physics85 citations
Semantic Scholar
Long‐term outcomes of proton beam therapy in patients with previously untreated hepatocellular carcinoma
Kuniaki Fukuda, T. Okumura, M. Abei, N. Fukumitsu +9 more
2017Cancer Science71 citations Open access
Semantic Scholar
Proton beam therapy combined with concurrent chemotherapy for esophageal cancer.
H. Ishikawa, Takayuki Hashimoto, T. Moriwaki, I. Hyodo +9 more
2014Anticancer Research65 citations
Semantic Scholar
Concurrent chemoradiotherapy using proton beams for unresectable locally advanced pancreatic cancer.
Y. Hiroshima, N. Fukumitsu, T. Saito, H. Numajiri +6 more
2019Radiotherapy and Oncology50 citations Open access
Semantic Scholar
Prediction of local failures with a combination of pretreatment tumor volume and apparent diffusion coefficient in patients treated with definitive radiotherapy for hypopharyngeal or oropharyngeal squamous cell carcinoma.
K. Ohnishi, Y. Shioyama, M. Hatakenaka, Katsumasa Nakamura +7 more
2011Journal of Radiation Research36 citations Open access
Semantic Scholar
Proton beam therapy for metastatic liver tumors.
N. Fukumitsu, T. Okumura, D. Takizawa, H. Makishima +8 more
2015Radiotherapy and Oncology32 citations
Semantic Scholar
Dose distribution resulting from changes in aeration of nasal cavity or paranasal sinus cancer in the proton therapy.
N. Fukumitsu, H. Ishikawa, K. Ohnishi, T. Terunuma +7 more
2014Radiotherapy and Oncology31 citations Open access
Semantic Scholar
Postoperative radiotherapy in patients with salivary duct carcinoma: clinical outcomes and prognostic factors
M. Shinoto, Y. Shioyama, Katsumasa Nakamura, Torahiko Nakashima +9 more
2013Journal of Radiation Research31 citations Open access
Semantic Scholar
Clinical outcomes of previously untreated patients with unresectable intrahepatic cholangiocarcinoma following proton beam therapy
S. Shimizu, T. Okumura, Y. Oshiro, N. Fukumitsu +10 more
2019Radiation Oncology30 citations Open access
Semantic Scholar
Are Intraoral Stents Effective for Reducing the Severity of Oral Mucositis During Radiotherapy for Maxillary and Nasal Cavity Cancer?
Yutaka Inoue, K. Yamagata, Masatoshi Nakamura, K. Ohnishi +2 more
2020Journal of oral and maxillofacial surgery27 citations
Semantic Scholar
Registration error of the liver CT using deformable image registration of MIM Maestro and Velocity AI
N. Fukumitsu, K. Nitta, T. Terunuma, T. Okumura +8 more
2017BMC Medical Imaging27 citations Open access
Semantic Scholar
Proton Beam Therapy for Hepatocellular Carcinoma: A Review of the University of Tsukuba Experience.
M. Mizumoto, Y. Oshiro, T. Okumura, N. Fukumitsu +6 more
2016International Journal of Particle Therapy26 citations Open access
Semantic Scholar
Esophageal stenosis associated with tumor regression in radiotherapy for esophageal cancer: frequency and prediction.
K. Atsumi, Y. Shioyama, H. Arimura, K. Terashima +10 more
2012International Journal of Radiation Oncology, Biology, Physics23 citations
Semantic Scholar
Fatal carotid blowout syndrome after BNCT for head and neck cancers.
T. Aihara, J. Hiratsuka, H. Ishikawa, H. Kumada +5 more
2015Applied Radiation and Isotopes22 citations
Semantic Scholar
Clinical Results of Definitive Chemoradiotherapy for Patients With Synchronous Head and Neck Squamous Cell Carcinoma and Esophageal Cancer
M. Shinoto, Y. Shioyama, Tomonari Sasaki, Katsumasa Nakamura +8 more
2011American Journal of Clinical Oncology22 citations Open access
Semantic Scholar
Concurrent chemoradiotherapy with S-1 for T2N0 glottic squamous cell carcinoma.
Takeshi Nonoshita, Y. Shioyama, Katsumasa Nakamura, Torahiko Nakashima +6 more
2010Journal of Radiation Research22 citations Open access
Semantic Scholar
Proton beam therapy for hepatocellular carcinoma with inferior vena cava tumor thrombus: report of three cases.
M. Mizumoto, K. Tokuuye, S. Sugahara, M. Hata +8 more
2007Japanese Journal of Clinical Oncology21 citations Open access
Semantic Scholar
Association between pretreatment retention rate of indocyanine green 15 min after administration and life prognosis in patients with HCC treated by proton beam therapy.
M. Mizumoto, Y. Oshiro, T. Okumura, Kuniaki Fukuda +7 more
2014Radiotherapy and Oncology20 citations
Semantic Scholar
Proton Beam Therapy for Histologically or Clinically Diagnosed Stage I Non-small Cell Lung Cancer (NSCLC): The First Nationwide Retrospective Study in Japan.
K. Ohnishi, N. Nakamura, H. Harada, S. Tokumaru +14 more
2019International Journal of Radiation Oncology, Biology, Physics19 citations Open access
Semantic Scholar
Periostin is a negative regulator of mineralization in the dental pulp tissue
Meng Zhou, N. Kawashima, Noriyuki Suzuk, Mioko Yamamoto +6 more
2015Odontology : official journal of The Society of the Nippon Dental University18 citations
Semantic Scholar
Proton Irradiation in a Single Fraction for Hepatocellular Carcinoma Patients with Uncontrollable Ascites
M. Hata, K. Tokuuye, S. Sugahara, E. Tohno +7 more
2007Strahlentherapie und Onkologie (Print)18 citations
Semantic Scholar
Proton beam therapy for liver metastases from gastric cancer
N. Fukumitsu, T. Okumura, D. Takizawa, H. Numajiri +6 more
2016Journal of Radiation Research17 citations Open access
Semantic Scholar
Concurrent chemoradiotherapy with S-1 as first-line treatment for patients with oropharyngeal cancer.
K. Ohnishi, Y. Shioyama, Katsumasa Nakamura, Torahiko Nakashima +6 more
2011Journal of Radiation Research17 citations Open access
Semantic Scholar
A clinical evaluation of visual feedback-guided breath-hold reproducibility of tumor location
T. Yoshitake, Y. Shioyama, Katsumasa Nakamura, S. Ohga +6 more
2009Physics in Medicine and Biology17 citations Open access
Semantic Scholar
Follow-up study of liver metastasis from breast cancer treated by proton beam therapy.
N. Fukumitsu, T. Okumura, H. Numajiri, D. Takizawa +6 more
2017Molecular and clinical oncology14 citations Open access
Semantic Scholar
Evaluation of Fluoride-18-Labeled Boronophenylalanine-Positron Emission Tomography Imaging for the Assessment of Boron Neutron Capture Therapy in Patients with Recurrent Head and Neck Squamous Cell Carcinoma
T. Aihara, J. Hiratsuka, N. Fukumitsu, H. Ishikawa +7 more
201614 citations Open access
Semantic Scholar
Hypofractionated Proton Beam Therapy for cT1-2N0M0 Non-small Cell Lung Cancer Patients With Interstitial Lung Disease
T. Saito, K. Ohnishi, H. Ishikawa, Masatoshi Nakamura +6 more
2021Anticancer Research13 citations Open access
Semantic Scholar
Spontaneous pneumothorax after stereotactic radiotherapy for non-small-cell lung cancer
K. Ohnishi, Y. Shioyama, S. Nomoto, Tomonari Sasaki +7 more
2009Japanese Journal of Radiology13 citations
Semantic Scholar
A validated proton beam therapy patch-field protocol for effective treatment of large hepatocellular carcinoma
Masatoshi Nakamura, N. Fukumitsu, S. Kamizawa, H. Numajiri +7 more
2018Journal of Radiation Research12 citations Open access
Semantic Scholar
A retrospective study of late adverse events in proton beam therapy for prostate cancer
H. Makishima, H. Ishikawa, Keiichi Tanaka, Yutaro Mori +6 more
2017Molecular and clinical oncology12 citations Open access
Semantic Scholar
Effects of lymphopenia on survival in proton therapy with chemotherapy for non-small cell lung cancer
Masatoshi Nakamura, H. Ishikawa, K. Ohnishi, Yutaro Mori +7 more
2023Journal of Radiation Research10 citations Open access
Semantic Scholar
Risk factors for venous thromboembolism induced by prolonged bed rest during interstitial brachytherapy for gynecological cancer: a retrospective study
K. Murofushi, T. Tomita, K. Ohnishi, K. Nakai +6 more
2021Radiation Oncology9 citations Open access
Semantic Scholar
Efficacy of the pretreatment geriatric nutritional risk index for predicting severe adverse events in patients with head and neck cancer treated with chemoradiotherapy: Efficacy of the pretreatment Geriatric Nutritional Risk Index for predicting severe adverse events.
M. Nakayama, K. Ohnishi, M. Adachi, R. Ii +8 more
2021Auris, nasus, larynx8 citations Open access
Semantic Scholar
Proton beam therapy for locally advanced and unresectable (T4bN0M0) squamous cell carcinoma of the ethmoid sinus: A report of seven cases and a literature review.
T. Saito, H. Ishikawa, K. Ohnishi, T. Aihara +5 more
2015Oncology Letters8 citations Open access
Semantic Scholar
Proton Beam Therapy for a Patient with a Giant Thymic Carcinoid Tumor and Severe Superior Vena Cava Syndrome
Kaori Sugawara, M. Mizumoto, H. Numajiri, T. Ohno +4 more
2014Rare Tumors8 citations Open access
Semantic Scholar
Effective palliative radiotherapy in primary malignant melanoma of the esophagus: a case report
Takeshi Nonoshita, Y. Shioyama, S. Nomoto, S. Ohga +7 more
2009The CASE Journal8 citations Open access
Semantic Scholar
Proton beam therapy in multimodal treatment for locally advanced squamous cell carcinoma of the nasal cavity and paranasal sinus
T. Saito, M. Nakayama, K. Ohnishi, Shuho Tanaka +8 more
2023Radiation Oncology7 citations Open access
Semantic Scholar
Long‐term outcomes of high‐dose (74 GyE) proton beam therapy with concurrent chemotherapy for stage III nonsmall‐cell lung cancer
K. Ohnishi, H. Ishikawa, K. Nakazawa, T. Shiozawa +6 more
2021Thoracic Cancer7 citations Open access
Semantic Scholar
Long‐term follow‐up of unresectable adenoid cystic carcinoma of the trachea and bronchus treated with high‐dose proton beam therapy: A report of two cases
Masatoshi Nakamura, K. Ohnishi, K. Nakazawa, Kei Shimizu +5 more
2023Thoracic Cancer6 citations Open access
Semantic Scholar
Salvage Photon or Proton Radiotherapy for Oligo-recurrence in Regional Lymph Nodes After Surgery for Non-small Cell Lung Cancer
Masatoshi Nakamura, K. Ohnishi, H. Ishikawa, K. Nakazawa +6 more
2020In Vivo6 citations Open access
Semantic Scholar
Proton beam therapy for renal pelvis and ureter cancer: A report of 5 cases and a literature review
T. Iizumi, H. Ishikawa, Y. Sekino, K. Ohnishi +3 more
2019Molecular and clinical oncology6 citations Open access
Semantic Scholar
Simulation study of dosimetric effect in proton beam therapy using concomitant boost technique for unresectable pancreatic cancers
N. Fukumitsu, T. Okumura, Y. Hiroshima, T. Ishida +7 more
2018Japanese Journal of Radiology5 citations
Semantic Scholar
Classical tandem-source dwelling covering the entire uterus: essential in modern intracavitary radiotherapy for cervical cancer?
K. Ohara, K. Nemoto, K. Ohnishi, Takayuki Hashimoto +5 more
2007Radiation Medicine5 citations
Semantic Scholar
Preliminary Study on Establishing a Heart Rate Variability-based Method for Objectively Evaluating Bone Metastasis Pain
K. Murofushi, Makoto Komazawa, Wataru Murofushi, S. Hayakawa +4 more
2023In Vivo4 citations Open access
Semantic Scholar
Normal liver tissue change after proton beam therapy
N. Fukumitsu, S. Takahashi, T. Okumura, T. Ishida +6 more
2018Japanese Journal of Radiology4 citations
Semantic Scholar
Primary adenocarcinoma of the lacrimal sac with 5-year recurrence-free survival after radiation therapy alone: a case report
D. Takizawa, K. Ohnishi, K. Hiratsuka, Ryota Matsuoka +6 more
2025International Cancer Conference Journal3 citations Open access
Semantic Scholar
Proton Beam Therapy in Elderly Patients With cT1-3N0M0 Non-small Cell Lung Cancer
Masatoshi Nakamura, H. Ishikawa, K. Ohnishi, K. Baba +8 more
2022Anticancer Research3 citations Open access
Semantic Scholar
Three cases of hepatocellular carcinoma treated 4 times with proton beams
M. Murakami, N. Fukumitsu, T. Okumura, H. Numajiri +6 more
2019Molecular and clinical oncology3 citations Open access
Semantic Scholar
[P266] Patient-optimized deep learning for robust tumor tracking
T. Terunuma, Koichi Tomoda, T. Sakae, K. Ohnishi +2 more
2018Physica medica (Testo stampato)3 citations Open access
Semantic Scholar

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H. Sakurai×30
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H. Sakurai — researcher profile on SciRah
H. Ishikawa×27
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T. Okumura×26
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T. Okumura — researcher profile on SciRah
N. Fukumitsu×20
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M. Mizumoto — researcher profile on SciRah

H. Numajiri×15

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Y. Shioyama×11

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Masatoshi Nakamura — researcher profile on SciRah

Katsumasa Nakamura×10

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Katsumasa Nakamura — researcher profile on SciRah