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ABFM NEWS - Radioterapia
 
IMRT commissioning: Multiple institution planning and dosimetry comparisons, a report from AAPM Task Group 119
 
AAPM Task Group 119 has produced quantitative confidence limits as baseline expectation values for IMRT commissioning. A set of test cases was developed to assess the overall accuracy of planning and delivery of IMRT treatments. [+ leia mais]
Colaborador: Laura Natal Rodrigues.
Fonte: AAPM.
 
 
Clinical and dosimetric predictors of late rectal toxicity after conformal radiation for localized prostate cancer: Results of a large multicenter...
 
Assessing the predictors of late rectal toxicity after high-dose conformal radiotherapy for prostate cancer. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy & Oncology.
 
 
Dose–volume effects for normal tissues in external radiotherapy: Pelvis.
 
A great deal of quantitative information regarding the dose–volume relationships of pelvic organs at risk has been collected and analysed over the last 10 years. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy & Oncology.
 
 
Strategies for Online Organ Motion Correction for Intensity-Modulated Radiotherapy of Prostate Cancer: Prostate, Rectum, and Bladder Dose Effects.
 
To quantify and evaluate the accumulated prostate, rectum, and bladder dose for several strategies including rotational organ motion correction for intensity-modulated radiotherapy (IMRT) of prostate cancer using realistic organ motion data. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
In Vivo Dosimetry With a Linear MOSFET Array to Evaluate the Urethra Dose During Permanent Implant Brachytherapy Using Iodine-125.
 
To develop a technique to monitor the dose rate in the urethra during permanent implant brachytherapy using a linear MOSFET array, with sufficient accuracy and without significantly extending the implantation time. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
A cost-outcome analysis of Image-Guided Patient Repositioning in the radiation treatment of cancer of the prostate.
 
With Image-Guided Radiation Therapy (IGRT) rapidly gaining acceptance in the clinic it is timely to commence an assessment of its potential outcome benefit versus costs. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy & Oncology.
 
 
On-line cone beam CT image guidance for vocal cord tumor targeting.
 
We are developing a technique for highly focused vocal cord irradiation in early glottic carcinoma to optimally treat a target volume confined to a single cord. This technique, in contrast with the conventional methods, aims at sparing the healthy vocal cord. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy & Oncology.
 
 
Tomographic image via background subtraction using an x-ray projection image and a priori computed tomography.
 
Kilovoltage x-ray projection images (kV images for brevity) are increasingly available in image guided radiotherapy (IGRT) for patient positioning. These images are two-dimensional (2D) projections of a three-dimensional (3D) object along the x-ray beam direction. [+ leia mais]
Fonte: Medical Physics.
 
 
Dose prescription complexity versus tumor control probability in biologically conformal radiotherapy.
 
The technical feasibility and potential benefits of voxel-based nonuniform dose prescriptions for biologically heterogeneous tumors have been widely demonstrated. [+ leia mais]
Fonte: Medical Physics.
 
 
Adaptive Replanning Strategies Accounting for Shrinkage in Head and Neck IMRT.
 
Significant anatomic and volumetric changes occur in head and neck cancer patients during fractionated radiotherapy, and the actual dose can be considerably different from the original plan. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Linac-based or robotic image-guided stereotactic radiotherapy for isolated lymph node recurrent prostate cancer.
 
We report on 14 patients treated with linac- or robotic image-guided stereotactic radiotherapy for isolated lymph node recurrence from prostate cancer, up to the mean dose of 30Gy/3 fractions. At the mean follow-up of 18.6months, five patients experienced clinical out-field progression. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Image quality and stability of image-guided radiotherapy (IGRT) devices: A comparative study.
 
Our aim was to implement standards for quality assurance of IGRT devices used in our department and to compare their performances with that of a CT simulator. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Role of image-guided patient repositioning and online planning in localized prostate cancer IMRT.
 
On 10 to 11 CT scans of each of 10 early-stage prostate cancer patients, the prostate, bladder and rectum are manually segmented. Using a 3-mm PTV margin expansion from the CTV, an IMRT plan is made on the first CT scan of each patient. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
The M. D. Anderson proton therapy system.
 
The purpose of this study is to describe the University of Texas M. D. Anderson proton therapy system (PTC-H) including the accelerator, beam transport, and treatment delivery systems, the functionality and clinical parameters for passive scattering and pencil beam scanning treatment modes, and the results of acceptance tests. [+ leia mais]
Fonte: Medical Physics.
 
 
Verification and source-position error analysis of film reconstruction techniques used in the brachytherapy planning systems.
 
A method was presented that employs standard linac QA tools to verify the accuracy of film reconstruction algorithms used in the brachytherapy planning system. [+ leia mais]
Fonte: Medical Physics.
 
 
Monte Carlo model for a prototype CT-compatible, anatomically adaptive, shielded intracavitary brachytherapy applicator for the treatment of cervical.
 
Current, clinically applicable intracavitary brachytherapy applicators that utilize shielded ovoids contain a pair of tungsten-alloy shields which serve to reduce dose delivered to the rectum and bladder during source afterloading. [+ leia mais]
Fonte: Medical Physics.
 
 
Correlation Between Pre- and Postimplant Dosimetry for Iodine-125 Seed Implants for Localized Prostate Cancer.
 
In order to evaluate implant quality for permanent prostate brachytherapy in patients with localized prostate cancer, American Brachytherapy Society and ESTRO guidelines recommend that postimplant dosimetry should be performed. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Effect of Audio Coaching on Correlation of Abdominal Displacement With Lung Tumor Motion.
 
To assess the effect of audio coaching on the time-dependent behavior of the correlation between abdominal motion and lung tumor motion and the corresponding lung tumor position mismatches. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Assessment of Spatial Uncertainties in the Radiotherapy Process With the Novalis System.
 
"The purpose of this study was to evaluate the accuracy of a new version of the ExacTrac X-ray (ETX) system with statistical analysis retrospectively in order to determine the tolerance of systematic components of spatial uncertainties with the Novalis system. " [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Predicting respiratory tumor motion with multi-dimensional adaptive filters and support vector regression.
 
Intra-fraction tumor tracking methods can improve radiation delivery during radiotherapy sessions. Image acquisition for tumor tracking and subsequent adjustment of the treatment beam with gating or beam tracking introduces time latency and necessitates predicting the future position of the tumor. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Physics in Medicine and Biology.
 
 
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