International journal of radiation oncology, biology, physics
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Int. J. Radiat. Oncol. Biol. Phys. · Nov 2006
Dosimetric comparison of four target alignment methods for prostate cancer radiotherapy.
The aim of this study was to compare the dosimetric consequences of 4 treatment delivery techniques for prostate cancer patients treated with intensity-modulated radiotherapy (IMRT). ⋯ Direct target alignment methods (US and CT) provided better target coverage. CT-guided alignment provided the best and most consistent dosimetric coverage. A larger planning target volume margin is needed for SV coverage when the alignment target is the prostate.
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Int. J. Radiat. Oncol. Biol. Phys. · Nov 2006
Randomized Controlled TrialContinuous accelerated 7-days-a-week radiotherapy for head-and-neck cancer: long-term results of phase III clinical trial.
To update 5-year results of a previously published study on special 7-days-a-week fractionation continuous accelerated irradiation (CAIR) for head-and-neck cancer patients. ⋯ Selected head-and-neck cancer patients could be treated very effectively with 7-days-a-week radiation schedule with no compromise of total dose and with slight 10% reduction of fraction dose (2 Gy-1.8 Gy), which article gives 1 week reduction of overall treatment time compared with standard 70 Gy in 35 fractions over 47-49 days. Although this report is based on the relatively small group of patients, its results have encouraged us to use CAIR fractionation in a standard radiation treatment for moderately advanced head-and-neck cancer patients.
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Int. J. Radiat. Oncol. Biol. Phys. · Nov 2006
Optimization of the temporal pattern of radiation: an IMRT based study.
To investigate how the temporal pattern of dose applied during a single-intensity modulated radiation therapy (IMRT) fraction can be arranged to maximize or minimize cell kill. ⋯ Rearrangement of the temporal pattern of dose for a single IMRT fraction could be used to optimize cell kill and to directly, though modestly, affect treatment outcome.
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Int. J. Radiat. Oncol. Biol. Phys. · Nov 2006
RPA classification has prognostic significance for surgically resected single brain metastasis.
To retrospectively evaluate prognostic factors that correlate with overall survival among patients with a surgically resected single brain metastasis. ⋯ This analysis supports the prognostic significance of the RPA classification in patients with a single brain metastasis who undergo surgical resection and adjuvant therapy. RPA class 1 patients have a very favorable prognosis with a median survival of 21.4 months.
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Int. J. Radiat. Oncol. Biol. Phys. · Nov 2006
Second malignancies after prostate brachytherapy: incidence of bladder and colorectal cancers in patients with 15 years of potential follow-up.
To report the incidence of second bladder and colorectal cancers after prostate brachytherapy. ⋯ There may be an increased but small risk of developing a second malignancy after radiation therapy for prostate cancer. This outcome could be related to radiation carcinogenesis, but more vigilant screening and thorough workup as a result of radiation side effects and predisposing conditions (e.g., genetic and environmental factors) in many of the patients found to have second malignancies likely contributed to the higher number of observed malignancies than expected.