International journal of radiation oncology, biology, physics
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Int. J. Radiat. Oncol. Biol. Phys. · Feb 1994
A mono isocentric technique for breast and regional nodal therapy using dual asymmetric jaws.
Definitive radiation therapy for breast cancer with regional nodal involvement often introduces treatment of adjacent abutted regions. Many methods describe techniques to achieve an effective transverse plane match. Our facility recently adopted a matching technique using asymmetric jaws to beam-split all portals along the central axis plane. Our technique uses one isocenter to treat the opposed tangential breast fields, the supraclavicular port and the posterior axillary field. ⋯ Our treatment technique takes full advantage of dual asymmetric jaws to achieve a perfect match-line, necessitates only one isocenter and set-up point, and supplies more absorption in reference to lung and contralateral breast dose. The pure match-line is accompanied by the fact that the patient does not have to move in any direction.
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Int. J. Radiat. Oncol. Biol. Phys. · Jan 1994
Randomized Controlled Trial Multicenter Study Clinical TrialPatterns of failure following loco-regional radiotherapy in the treatment of limited stage small cell lung cancer.
The probability of treatment resistant cells developing in a tumor, such as small cell lung cancer (SCLC) which has a rapid cell cycle time, is a function of the number of tumor cells present and of time. Theoretically, the development of resistance to chemotherapy and radiotherapy should be minimized by using all treatment modalities early in the treatment program. ⋯ We conclude that early administration of locoregional radiotherapy in a combined modality treatment is superior to late consolidative locoregional radiotherapy in limited small cell lung cancer.
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Int. J. Radiat. Oncol. Biol. Phys. · Jan 1994
Randomized Controlled Trial Comparative Study Clinical TrialLow dose rate vs. high dose rate brachytherapy in the treatment of carcinoma of the uterine cervix: a clinical trial.
This study is a prospective randomized clinical trial undertaken at our center to compare low dose rate versus high dose rate intracavitary brachytherapy for the treatment of carcinoma uterine cervix. ⋯ Thus high dose rate intracavitary brachytherapy is an equally good alternative to conventional low dose rate brachytherapy in the treatment of carcinoma of the uterine cervix.
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Int. J. Radiat. Oncol. Biol. Phys. · Jan 1994
Increased chronic bowel complications with split-course pelvic irradiation.
To assess the possible impact of various treatment factors including split-course versus continuous course treatment on the incidence of chronic bowel complications in patients receiving adjuvant pelvic radiotherapy. ⋯ This study supports earlier suggestions that the use of split course rather than continuous course pelvic radiotherapy can increase late intestinal complication rates. Possible pathophysiologic mechanisms are discussed.
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Int. J. Radiat. Oncol. Biol. Phys. · Jan 1994
Review Clinical TrialInterstitial hyperthermia and high dose rate brachytherapy in the treatment of anal cancer: a phase I/II study.
The rate of local failure is sufficiently high following sphincter conserving surgery and radiation therapy for advanced anal cancers to warrant investigation of improved local treatment techniques. This Phase I/II study was undertaken to investigate the site-specific toxicities and response of Stage II and III anal cancers to interstitial thermoradiotherapy using a hot water interstitial system. ⋯ This study demonstrates that interstitial warm water hyperthermia in combination with brachytherapy for anal carcinomas is feasible and did not add to complications when compared to studies employing external beam irradiation and brachytherapy alone. The thermal parameters obtained by the warm water system compare favorably to those reported by others using radiofrequency and microwave systems.