Discrepancies in determining electron energy for lumpectomy boost treatment
نویسندگان
چکیده
منابع مشابه
Ultrasound-guided boost irradiation of tumor cavity after lumpectomy in breast cancer
Background: After breast conserving surgery, most recurrences occur around the primary tumor site. This justifies the use of boost radiotherapy to the primary site of tumor. Surgical scar is not always a good surrogate for the location of the lumpectomy cavity. The aim of this study was to evaluate ultrasonic guidance for detection of the lumpectomy cavity after breast conserving surgery ...
متن کاملImage guidance using 3D-ultrasound (3D-US) for daily positioning of lumpectomy cavity for boost irradiation
PURPOSE The goal of this study was to evaluate the use of 3D ultrasound (3DUS) breast IGRT for electron and photon lumpectomy site boost treatments. MATERIALS AND METHODS 20 patients with a prescribed photon or electron boost were enrolled in this study. 3DUS images were acquired both at time of simulation, to form a coregistered CT/3DUS dataset, and at the time of daily treatment delivery. I...
متن کاملLumpectomy compared with lumpectomy and radiation therapy for the treatment of intraductal breast cancer.
BACKGROUND AND METHODS Women with ductal carcinoma in situ have been treated both by lumpectomy and by lumpectomy followed by radiation therapy, but the benefit of combined therapy is uncertain. A group of 818 women with ductal carcinoma in situ were randomly assigned to undergo lumpectomy or lumpectomy followed by breast irradiation (50 Gy). Sufficient tissue was removed that the margins of th...
متن کاملDiscrepancies in dose distributions due to age- dependent bone electron density in pediatric MRI-only treatment planning: A Monte Carlo study
Introduction: MRI-only treatment planning (TP) can be advantageous in paediatric radiotherapy. However, electron density extraction is necessary for dose calculation. Normally, after bone segmentation, a bulk density is assigned. However, the variation of bone bulk density in patients makes the creation of pseudo CTs challenging. This study aims to assess the effects of bone den...
متن کاملDesign and evaluation of electron beam energy degraders for breast boost irradiation
BACKGROUND For breast cancer patients who require electron boost energies between 6 and 9 MeV, an energy degraders (ED) in the 9 MeV beamline was specially designed and manufactured to increase the skin dose of 6 MeV and to reduce the penetration depth of 9 MeV beams. METHODS We used Monte Carlo (MC) techniques as a guide in the design of ED for use with linear accelerators. In order to satis...
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ژورنال
عنوان ژورنال: Journal of Medical Physics
سال: 2012
ISSN: 0971-6203
DOI: 10.4103/0971-6203.99234