International journal of radiation oncology, biology, physics
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Int. J. Radiat. Oncol. Biol. Phys. · Jan 2008
Randomized Controlled Trial Multicenter Study Comparative StudyComparison of treatment tolerance and outcomes in patients with cervical cancer treated with concurrent chemoradiotherapy in a prospective randomized trial or with standard treatment.
To compare the treatment and outcomes of cervical cancer patients treated with concurrent chemoradiotherapy (CT-RT) in a multi-institutional trial or as standard care. ⋯ Even within a large comprehensive cancer center, the high rates of chemotherapy completion achieved on a multi-institutional trial can be difficult to reproduce in standard practice. Although C/F toxicity was greater in the standard care patients, their outcomes were similar to those of patients treated with C/F on Radiation Therapy Oncology Group protocol 90-01.
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Helical tomotherapy uses a dynamic delivery in which the gantry, treatment couch, and multileaf collimator leaves are all in motion during treatment. This results in highly conformal radiotherapy, but the complexity of the delivery is partially hidden from the end-user because of the extensive integration and automation of the tomotherapy control systems. This presents a challenge to the medical physicist who is expected to be both a system user and an expert, capable of verifying relevant aspects of treatment delivery. ⋯ The integrated treatment planning, delivery, and patient-plan quality assurance process is described. A quality assurance protocol is proposed, with an emphasis on what a clinical medical physicist could and should check. Additionally, aspects of a tomotherapy quality assurance program that could be checked automatically and remotely because of its inherent imaging system and integrated database are discussed.
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Int. J. Radiat. Oncol. Biol. Phys. · Jan 2008
Clinical significance of margin status in postoperative radiotherapy for extremity and truncal soft-tissue sarcoma.
To evaluate whether adjuvant radiotherapy (RT) in extremity and truncal soft-tissue sarcoma (STS) patients with microscopically positive or close margins after excision can achieve comparable local control to that of excision with negative margin plus RT. ⋯ In our series, margin status did not predict for LF when adjuvant RT was used. We believe that when adjuvant RT is used, re-resection may not be necessary for selected patients with positive or close pathologic margins in the management of extremity and truncal STS patients.
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Int. J. Radiat. Oncol. Biol. Phys. · Jan 2008
(125)I monotherapy using D90 implant doses of 180 Gy or greater.
The purpose of this study was to characterize the oncologic results and toxicity profile of patients treated with (125)I implants using the dose delivered to 90% of the gland from the dose-volume histogram (D90) of greater than 144 Gy. ⋯ Patients with a minimum D90 of 180 Gy had outstanding local control based on prostate-specific antigen control and biopsy data. Toxicity profiles, particularly for long-term urinary and sexual function, were excellent and showed that D90 doses of 180 Gy or greater performed using the technique described were feasible and tolerable.