International journal of radiation oncology, biology, physics
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Int. J. Radiat. Oncol. Biol. Phys. · Jun 2007
Long-term efficacy and patterns of failure after accelerated partial breast irradiation: a molecular assay-based clonality evaluation.
To determine the long-term efficacy and cosmetic results of accelerated partial breast irradiation (APBI) by reviewing our institution's experience. ⋯ Long-term results with APBI using interstitial brachytherapy continue to demonstrate excellent long-term local and regional control rates and cosmetic results. According to a polymerase chain reaction-based loss of heterozygosity assay, 83% of recurrences were classified as clonally related.
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Int. J. Radiat. Oncol. Biol. Phys. · Jun 2007
Randomized Controlled TrialEstimation of radiobiologic parameters and equivalent radiation dose of cytotoxic chemotherapy in malignant glioma.
To determine the radiobiologic parameters for high-grade gliomas. ⋯ The radiobiologic parameters for human high-grade gliomas can be estimated from clinical trials and could be used to inform future clinical trials, particularly combined modality treatments with newer forms of radiotherapy. Other incurable cancers should be studied using similar radiobiologic analysis.
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Int. J. Radiat. Oncol. Biol. Phys. · Jun 2007
Automatic segmentation of pelvic structures from magnetic resonance images for prostate cancer radiotherapy.
Target-volume and organ-at-risk delineation is a time-consuming task in radiotherapy planning. The development of automated segmentation tools remains problematic, because of pelvic organ shape variability. We evaluate a three-dimensional (3D), deformable-model approach and a seeded region-growing algorithm for automatic delineation of the prostate and organs-at-risk on magnetic resonance images. ⋯ Our results show that the organ-model method is robust, and results in reproducible prostate segmentation with minor interactive corrections. For automatic bladder and rectum delineation, magnetic resonance imaging soft-tissue contrast enables the use of region-growing methods.
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Int. J. Radiat. Oncol. Biol. Phys. · Jun 2007
Randomized Controlled TrialInfluence of interfraction interval on local tumor control in patients with limited-disease small-cell lung cancer treated with radiochemotherapy.
To investigate the influence of interfraction interval (IFI) on local recurrence-free survival (LRFS) in patients with limited-disease small-cell lung cancer (LD SCLC) treated with accelerated hyperfractionated radiotherapy (Acc Hfx RT) and concurrent cisplatin and etoposide (PE). ⋯ "Shorter" IFI had a marginally insignificant influence on LRFS. A strong trend favoring it was observed in patients treated with "late" concurrent Acc Hfx RT/PE. This may be of interest because it could contribute to further understanding of potential biologic parameters influencing treatment outcome.
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Int. J. Radiat. Oncol. Biol. Phys. · Jun 2007
Comparative StudyKilo-voltage cone-beam computed tomography setup measurements for lung cancer patients; first clinical results and comparison with electronic portal-imaging device.
Kilovoltage cone-beam computed tomography (CBCT) has been developed to provide accurate soft-tissue and bony setup information. We evaluated clinical CBCT setup data and compared CBCT measurements with electronic portal imaging device (EPID) images for lung cancer patients. ⋯ Use of CBCT scans provided more accurate information concerning the setup of lung cancer patients than did portal imaging.