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ABFM NEWS - Radioterapia
 
The validation of tomotherapy dose calculations in low-density lung media.
 
The dose-calculation accuracy of the tomotherapy Hi-Art II® (Tomotherapy, Inc., Madison, WI) treatment planning system (TPS) in the presence of low-density lung media was investigated. In this evaluation, a custom-designed heterogeneous phantom mimicking the mediastinum geometry was used. [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Physics in Medicine and Biology.
 
 
Tracking brachytherapy sources using emission imaging with one flat panel detector.
 
This work proposes to use the radiation from brachytherapy sources to track their dwell positions in three-dimensional (3D) space. The prototype device uses a single flat panel detector and a BB tray. [+ leia mais]
Fonte: Medical Physics.
 
 
Four-Dimensional Intensity-Modulated Radiotherapy Planning for Dynamic Multileaf Collimator Tracking Radiotherapy.
 
"To develop a four-dimensional intensity-modulated radiotherapy (IMRT) planning method for dynamic multileaf collimator (DMLC)–based tumor tracking that takes respiratory motion into consideration. " [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Extrapolation of Normal Tissue Complication Probability for Different Fractionations in Liver Irradiation.
 
A new expression of normalized total dose (NTD) is proposed to convert NTCP data between different treatment schemes. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Pelvic Radiotherapy for Cancer of the Cervix: Is What You Plan Actually What You Deliver?
 
Whole pelvic intensity-modulated radiotherapy (IMRT) is increasingly being used to treat cervix cancer and other gynecologic tumors. However, tumor and normal organ movement during treatment can substantially detract from the benefits of this approach. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Volumetric Intensity-Modulated Arc Therapy Vs. Conventional IMRT in Head-and-Neck Cancer: A Comparative Planning and Dosimetric Study.
 
Volumetric intensity-modulated arc therapy (RA) allows for rapid delivery of highly conformal dose distributions. In this study, planning and dosimetry of RA were compared with conventional intensity-modulated radiation therapy (IMRT) plans of head-and-neck cancer patients. [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Effect of body mass index on shifts in ultrasound-based image-guided intensity-modulated radiation therapy for abdominal malignancies.
 
We investigated whether corrective shifts determined by daily ultrasound-based image-guidance correlate with body mass index (BMI) of patients treated with image-guided intensity-modulated radiation therapy (IG-IMRT) for abdominal malignancies. The utility of daily image-guidance, particularly for patients with BMI>25.0, is examined... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
3D In Vivo Dosimetry Using Megavoltage Cone-Beam CT and EPID Dosimetry.
 
To develop a method that reconstructs, independently of previous (planning) information, the dose delivered to patients by combining in-room imaging with transit dose measurements during treatment... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Potential Dosimetric Benefits of Four-Dimensional Radiation Treatment Planning.
 
To determine the extent of dosimetric differences between conventional three-dimensional (3D) dose calculations and four-dimensional (4D) dose calculations based on deformation of organ models... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Point: Cesium-131: Ready for prime time.
 
The first permanent prostate implants with 131Cs were performed in late 2004. In less than 4 years, the brachytherapy community has performed almost 3000 implants at more than 50 sites... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Brachytherapy.
 
 
Boron neutron capture therapy for newly diagnosed glioblastoma.
 
The efficacy, safety, and dose distribution of neutron capture therapy (NCT) were evaluated in 15 patients with newly diagnosed glioblastoma... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Use of PET and PET/CT for Radiation Therapy Planning: IAEA expert report 2006–2007.
 
Positron Emission Tomography (PET) is a significant advance in cancer imaging with great potential for optimizing radiation therapy (RT) treatment planning and thereby improving outcomes for patients. The use of PET and PET/CT in RT planning was reviewed by an international panel... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Monte Carlo study shows no significant difference in second cancer risk between 6- and 18-MV intensity-modulated radiation therapy.
 
To evaluate the photon and neutron out-of-field dose equivalents from 6- and 18-MV intensity-modulated radiation therapy (IMRT) and to investigate the impact of the differences on the associated risk of induced second malignancy using a Monte Carlo model... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Dosimetry and field matching for radiotherapy to the breast and supraclavicular fossa.
 
Early breast cancer radiotherapy aims for local disease control and reduced recurrence. Treatment is directed to breast or chest wall alone using tangential fields, or includes regional lymph nodes with a separate anterior field... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
The delta envelope: A technique for dose distribution comparison.
 
The gamma index is a tool that compares a dose distribution with a reference distribution by combining dose-difference and distance-to-agreement criteria. It has been widely used for ten years despite its high computational cost. [+ leia mais]
Fonte: Medical Physics.
 
 
Integral dose conservation in radiotherapy.
 
Treatment planners frequently modify beam arrangements and use IMRT to improve target dose coverage while satisfying dose constraints on normal tissues... [+ leia mais]
Fonte: Medical Physics.
 
 
Biological equivalent dose studies for dose escalation in the stereotactic synchrotron radiation therapy clinical trials.
 
Synchrotron radiation is an innovative tool for the treatment of brain tumors. In the stereotactic synchrotron radiation therapy (SSRT) technique a radiation dose enhancement specific to the tumor is obtained... [+ leia mais]
Fonte: Medical Physics.
 
 
Radiotherapy margin design with particular consideration of high curvature CTVs.
 
In applying 3D conformal radiation therapy to a tumor clinical target volume (CTV), a margin is added around the CTV to account for any sources of error in the application of treatment which may result in misalignment between the CTV and the dose distribution actually delivered... [+ leia mais]
Fonte: Medical Physics.
 
 
Boost first, eliminate systematic error, and individualize CTV to PTV margin when treating lymph nodes in high-risk prostate cancer.
 
The purpose of this report is to evaluate the movement of the planning target volume (PTV) in relation to the pelvic lymph nodes (PLNs) during treatment of high-risk prostate cancer... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
A qualitative and a quantitative analysis of an auto-segmentation module for prostate cancer.
 
The validated auto-segmentation algorithm (Smart Segmentation, version 1.0.05) is a rule-based algorithm using anatomical reference points and organ-specific segmentation methods, developed by Varian Medical Systems (Varian Medical Systems iLab, Baden, Switzerland)... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
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