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ABFM NEWS - Radioterapia
 
Dosimetric effects of an air cavity for the SAVI™ partial breast irradiation applicator
 
Purpose: To investigate the dosimetric effect of the air inside the SAVI™ partial breast irradiation device. [+ leia mais]
Fonte: Medical Physics
 
 
Evaluation of the radiobiological impact of anatomic modifications during radiation therapy for head and neck cancer: Can we simply summate the dose?
 
"Abstract Background and purpose Adaptive strategies in radiotherapy (RT) require the knowledge of the total dose given to every organ of the body. Because of anatomical changes and setup errors non-rigid registration is necessary to map the different dose fractions to a common reference. This study evaluates practically if the accumulation of all of these registered dose fractions must take radiobiology into account in a classical clinical setting. " [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Improved immobilization using an individual head support in head and neck cancer patients
 
In the last few years, intensity-modulated radiotherapy (IMRT) has been used increasingly for head and neck (HN) cancer patient treatments. [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Deviations in delineated GTV caused by artefacts in 4DCT
 
"Abstract Background and purpose Four-dimensional computed tomography (4DCT) is used for breathing-adapted radiotherapy planning. Irregular breathing, large tumour motion or interpolation of images can cause artefacts in the 4DCT. This study evaluates the impact of artefacts on gross tumour volume (GTV) size. " [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Improving target delineation on 4-dimensional CT scans in stage I NSCLC using a deformable registration tool
 
"Abstract Introduction Correct target definition is crucial in stereotactic radiotherapy for lung tumors. We evaluated use of deformable registration (DR) for target contouring on 4-dimensional (4D) CT scans." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
A study on the dosimetric accuracy of treatment planning for stereotactic body radiation therapy of lung cancer using average and maximum intensity pr
 
"Abstract Purpose To assess the accuracy of current stereotactic body radiation therapy (SBRT) lung treatment planning methodologies on irregular breathing patterns, we have performed a systematic dosimetric evaluation in phantoms by utilizing maximum intensity projection (MIP) and average (AVG) images generated from four dimensional computed tomography (4DCT)." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Migration of intraprostatic fiducial markers and its influence on the matching quality in external beam radiation therapy for prostate cancer
 
"Abstract Purpose To assess the influence of fiducial marker (FM) migration on the matching quality in external beam radiation therapy (EBRT) for prostate cancer." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Loose seeds versus stranded seeds in I-125 prostate brachytherapy: Differences in clinical outcome
 
"Abstract Purpose To assess clinical outcome in terms of biochemical No evidence of disease (bNED) for patients with stranded seed implants versus loose seed implants in prostate brachytherapy." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Evaluation of the peripheral dose in stereotactic radiotherapy and radiosurgery treatments
 
Purpose: The main purpose of this work was to compare peripheral doses absorbed during stereotactic treatment of a brain lesion delivered using different devices. These data were used to estimate the risk of stochastic effects. [+ leia mais]
Fonte: Medical Physics
 
 
Direct absorbed dose to water determination based on water calorimetry in scanning proton beam delivery
 
Purpose: The aim of this manuscript is to describe the direct measurement of absolute absorbed dose to water in a scanned proton radiotherapy beam using a water calorimeter primary standard. [+ leia mais]
Fonte: Medical Physics
 
 
Total skin electron therapy (TSET): A reimplementation using radiochromic films and IAEA TRS-398 code of practice
 
Purpose: The aim of this work is to present an updated implementation of total skin electron therapy (TSET) using IAEA TRS-398 code of practice for absolute dosimetry and taking advantage of the use of radiochromic films. The optimization of quality control tests is also included. [+ leia mais]
Fonte: Medical Physics
 
 
Wide field array calibration dependence on the stability of measured dose distributions
 
Purpose: The aim of this work was to simulate the effect of dose distribution changes on detector array calibrations and to explore compensatory methods that are used during calibration measurements. [+ leia mais]
Fonte: Medical Physics
 
 
Prescribing, Recording, and Reporting Intensity-Modulated Photon-Beam Therapy (IMRT)(ICRU Report 83)
 
Rapid developments in imaging techniques, including functional imaging, have fueled the drive to implement new methods of delivering three-dimensional radiation therapy, such as intensity-modulated radiation therapy (IMRT), with unprecedented accuracy. [+ leia mais]
Fonte: ICRU
 
 
Radiobiological evaluation of forward and inverse IMRT using different fractionations for head and neck tumours
 
Purpose To quantify the radiobiological advantages obtained by an Improved Forward Planning technique (IFP) and two IMRT techniques using different fractionation schemes for the irradiation of head and neck tumours. The conventional radiation therapy technique (CONVT) was used here as a benchmark. [+ leia mais]
Fonte: Radiation Oncology
 
 
Independent position correction on tumor and lymph nodes; consequences for bladder cancer irradiation with two combined IMRT plans
 
"Background The application of lipiodol injections as markers around bladder tumors combined with the use of CBCT for image guidance enables daily on-line position correction based on the position of the bladder tumor. However, this might introduce the risk of underdosing the pelvic lymph nodes. In this study several correction strategies were compared." [+ leia mais]
Fonte: Radiation Oncology
 
 
Planning target volume margins for prostate radiotherapy using daily electronic portal imaging and implanted fiducial markers
 
"Background Fiducial markers and daily electronic portal imaging (EPI) can reduce the risk of geographic miss in prostate cancer radiotherapy. The purpose of this study was to estimate CTV to PTV margin requirements, without and with the use of this image guidance strategy." [+ leia mais]
Fonte: Radiation Oncology
 
 
Early clinical experience of radiotherapy of prostate cancer with volumetric modulated arc therapy
 
"Background To report about initial clinical experience in radiation treatment of carcinoma of prostate with volumetric modulated arcs with the RapidArc (RA) technology." [+ leia mais]
Fonte: Radiation Oncology
 
 
A Dose–Volume Analysis of Magnetic Resonance Imaging-Aided High-Dose-Rate Image-Based Interstitial Brachytherapy for Uterine Cervical Cancer
 
"Purpose To investigate the feasibility of our novel image-based high-dose-rate interstitial brachytherapy (HDR-ISBT) for uterine cervical cancer, we evaluated the dose–volume histogram (DVH) according to the recommendations of the Gynecological GEC-ESTRO Working Group for image-based intracavitary brachytherapy (ICBT). " [+ leia mais]
Fonte: Int J of Radiation Oncology, Biology, Physics
 
 
Dosimetric Evaluation of Automatic Segmentation for Adaptive IMRT for Head-and-Neck Cancer
 
"Purpose Adaptive planning to accommodate anatomic changes during treatment requires repeat segmentation. This study uses dosimetric endpoints to assess automatically deformed contours. " [+ leia mais]
Fonte: Int J of Radiation Oncology, Biology, Physics
 
 
Effect of Radiotherapy Dose and Volume on Relapse in Merkel Cell Cancer of the Skin
 
"Purpose To assess the effect of radiotherapy (RT) dose and volume on relapse patterns in patients with Stage I–III Merkel cell carcinoma (MCC). " [+ leia mais]
Fonte: Int J of Radiation Oncology, Biology, Physics
 
 
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