Takayuki Hashimoto

Learn More
To evaluate the effectiveness of short-course radiotherapy (RT) with 30 Gy in 10 fractions for bleeding from advanced gastric cancer. We reviewed the data for all patients with gastric cancer requiring blood transfusions due to gastric bleeding who were treated with RT at the Shizuoka Cancer Center Hospital between September 2002 and March 2007. Patients(More)
BACKGROUND Although proton radiotherapy is a promising new approach for cancer patients, functional interference is a concern for patients with implantable cardioverter defibrillators (ICDs). The purpose of this study was to clarify the influence of secondary neutrons induced by proton radiotherapy on ICDs. METHODS The experimental set-up simulated proton(More)
PURPOSE To evaluate the feasibility of real-time monitoring of a fiducial marker in/near the digestive tract and to analyze the motion of organs at risk to determine a reasonable internal margin. METHODS AND MATERIALS We developed two methods to insert a fiducial marker into/near the digestive tract adjacent to the target volume. One method involves an(More)
The study was performed to evaluate radiotherapy for patients with intramedullary spinal cord metastasis (ISCM) and to identify the clinical features of ISCM. The subjects were 18 patients (8 men, 10 women) with ISCM who underwent radiotherapy between September 2002 and February 2008. The primary lesions were lung cancer in 8 patients (2 small cell, 6(More)
PURPOSE Our previous results for treatment of hepatocellular carcinoma with proton beam therapy (PBT) revealed excellent local control. In this study, we focused on the impact of PBT on normal liver function. METHODS AND MATERIALS The subjects were 259 patients treated with PBT at the University of Tsukuba between January 2001 and December 2007. We(More)
PURPOSE To evaluate clinical results of proton beam therapy for patients with skull base chordoma. METHODS AND MATERIALS Thirteen patients with skull base chordoma who were treated with proton beams with or without X-rays at the University of Tsukuba between 1989 and 2000 were retrospectively reviewed. A median total tumor dose of 72.0 Gy (range,(More)
PURPOSE Radiation therapy for cancer may be required for patients with implantable cardiac devices. However, the influence of secondary neutrons or scattered irradiation from high-energy photons (≥10 MV) on implantable cardioverter-defibrillators (ICDs) is unclear. This study was performed to examine this issue in 2 ICD models. METHODS AND MATERIALS ICDs(More)
BACKGROUND Treatment modalities for patients with hepatocellular carcinoma (HCC) who have portal vein tumor thrombus (PVTT) are limited and controversial; furthermore, the prognosis for these patients is extremely poor. The authors conducted a retrospective review to determine the role of proton beam therapy in the treatment of patients who had HCC with(More)
To evaluate the effectiveness and feasibility of proton therapy for head and neck cancers. From 1983 to 2000, 33 patients with head and neck malignancies but no history of surgical resection were treated with 250-MeV protons with or without X-ray irradiation. This study retrospectively evaluated local control, survival, and treatment sequelae of these(More)
PURPOSE To present treatment outcomes of hypofractionated high-dose proton beam therapy for Stage I non-small-cell lung cancer (NSCLC). METHODS AND MATERIALS Twenty-one patients with Stage I NSCLC (11 with Stage IA and 10 with Stage IB) underwent hypofractionated high-dose proton beam therapy. At the time of irradiation, patient age ranged from 51 to 85(More)