Observed high incidence of prostatic calculi with the potential to act as natural fiducials for prostate image guided radiotherapy
نویسندگان
چکیده
منابع مشابه
Image-guided prostate radiotherapy: analysis of inter- fractional setup errors
Introduction: The accuracy of the patient setup and tumor location are major factors that determine the efficacy of radiotherapy treatment planning. In the prostate radiotherapy, reproducibility of the prostate location for each treatment fraction is problematic owing to varying filling of the rectum and bladder. According to this, the aim of this study was to measure the inte...
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Patients with early stage high-risk prostate cancer (prostate specific antigen > 20, Gleason score > 7) are at high risk of recurrence following prostate cancer irradiation. Radiation dose escalation to the prostate may improve biochemical-free survival for these patients. However, high rectal and bladder dose with conventional three-dimensional conformal radiotherapy may lead to excessive gast...
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BACKGROUND Prostate radiotherapy (RT) dose escalation has been reported to result in improved biochemical control at the cost of greater late toxicity. We report on the application of 79.8 Gy in 42 fractions of prostate image guided RT (IGRT). The primary objective was to assess 5-year biochemical control and potential prognostic factors by the Phoenix definition. Secondary endpoints included a...
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During a course of external beam radiotherapy the prostate gland moves both between radiotherapy fractions (interfractional motion) and during treatment (intrafractional motion). Some of this motion is related to changes in rectal and bladder filling, and movements are more marked in the antero-posterior direction as a result of rectal filling variability, compared to laterally and superoinferi...
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Accurate 3-D prostate segmentation is a significant and challenging issue for CT image guided radiotherapy. In this paper, a novel transductive method for 3-D prostate segmentation is proposed, which incorporates the physician’s interactive labeling information, to aid accurate segmentation, especially when large irregular prostate motion occurs. More specifically, for the current treatment ima...
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ژورنال
عنوان ژورنال: Technical Innovations & Patient Support in Radiation Oncology
سال: 2019
ISSN: 2405-6324
DOI: 10.1016/j.tipsro.2019.01.004