Takuhito Tada

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Most patients with small cell lung cancer (SCLC) usually show relapse within 1 or 2 years. Relapses after a 5-year disease-free survival are extremely rare. This report describes two patients with stage I SCLC in whom the disease recurred 10 or more years after the start of initial therapy. Because the recurrence of SCLC was noted in the mediastinal lymph(More)
We investigated patterns of failure after radical radiation therapy in relation to the radiation field in patients with postsurgical locoregional recurrence of non-small cell lung cancer. Between 1992 and 2002, 31 patients with locoregional recurrence were treated with radiation therapy. At the time of radiation therapy, the sites of recurrence were the(More)
PURPOSE In order to obtain a respiratory signal for gated radiotherapy, diaphragm movement was monitored. MATERIALS AND METHODS To obtain the diaphragm signal, an image brightness stabilizer for fluoroscopy of an X-ray simulator was used. The image brightness stabilizer output electric current in response to image brightness, which changed with diaphragm(More)
PURPOSE To supplement findings of the West Japan Lung Cancer Group (WJLCG) study, treatment outcomes in our institution were reviewed from the perspective of radiation oncology. MATERIALS AND METHODS Chemotherapy consisted of cisplatin (80 mg/m2 on days 1 and 29), vindesine (3 mg/m2 on days 1, 8, 29, and 36), and mitomycin (8 mg/m2 on days 1 and 29). In(More)
BACKGROUND On simulation radiographs of oblique fields, the spinal canal is estimated to be located on the deep surface of the tangential parts of the vertebral laminae within a width of the oblique diameter of the spinal canal. The aim of this study was to evaluate the accuracy of the estimated location of the spinal canal. MATERIALS AND METHODS Beam's(More)
A phase II one-arm study was performed to evaluate the efficacy and safety of concurrent chemoradiotherapy with the use of uneven fractionation in glioblastoma patients. A total of 19 glioblastoma patients underwent concurrent chemoradiotherapy with the use of uneven fractionation. Vincristine (VCR) and(More)
Spontaneous pneumothorax following radiotherapy for pulmonary malignancy is an unusual clinical condition. Here, we report a case of a 78-year-old male suffering from dyspnea during radiotherapy for squamous cell lung cancer of the right main bronchus. Imaging studies and fiberoptic bronchoscopy revealed that pneumothorax was due to a bronchopleural fistula.
PURPOSE The aim of this study was to determine the potential use of high-resolution FDG-microPET for predicting the primary effects of radiotherapy and/or hyperthermia on tumor-bearing rabbits. METHODS Twenty-eight VX2 xenografts in the thighs of rabbits were divided into the following 5 treatment groups: radiotherapy at a single dose of 10, 20 or 30 Gy,(More)
OBJECTIVE To compare dosimetric parameters and acute toxicity rates between whole-pelvic (WP) and prostate-only (PO) volumetric-modulated arc therapy (VMAT) in patients with localized prostate cancer. METHODS A total of 224 consecutive patients treated with definitive VMAT to 78 Gy in 39 fractions were enrolled. Of these, 119 patients received initial WP(More)
The objectives of this study were to evaluate dosimetric quality and acute toxicity of volumetric-modulated arc therapy (VMAT) and daily image guidance in high-risk prostate cancer patients. A total of 100 consecutive high-risk prostate cancer patients treated with definitive VMAT with prophylactic whole-pelvic radiotherapy (WPRT) were enrolled. All(More)