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ABFM NEWS - Radioterapia
 
Protons for radiotherapy: a 1946 proposal.
 
"Hall, Eric, Volume 10, Issue 2, February 2009, Pages Page 196. " [+ leia mais]
Colaborador: Laura Natal Rodrigues.
Fonte: The Lancet Oncology,
 
 
A dosimetric comparison of MammoSite® and ClearPath high-dose-rate breast brachytherapy devices.
 
A new form of partial breast irradiation (PBI), ClearPath (CP) breast brachytherapy, has been introduced. We present our results of a dosimetric comparison of MammoSite® (MS) and CP PBI... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Brachytherapy.
 
 
Magnetic field effects on the energy deposition spectra of MV photon radiation.
 
Several groups worldwide have proposed various concepts for improving megavoltage (MV) radiotherapy that involve irradiating patients in the presence of a magnetic field—either for image guidance in the case of hybrid radiotherapy-MRI machines or for purposes of introducing tighter control over dose distributions... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Physics in Medicine and Biology.
 
 
Inter-fraction motion and dosimetric consequences during breast intensity-modulated radiotherapy (IMRT).
 
Intensity-modulated radiotherapy (IMRT) can improve dose homogeneity within the breast planned target volume (PTV), but may be more susceptible to patient/organ motion than standard tangential radiotherapy (RT). We used daily cone-beam CT (CBCT) imaging to assess inter-fraction motion during breast IMRT and its subsequent impact on IMRT and standard RT dose homogeneity... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Dosimetric comparison of four different external beam partial breast irradiation techniques...
 
As an alternative to whole breast irradiation in early breast cancer, a variety of accelerated partial breast irradiation (APBI) techniques have been investigated. The purpose of our study is to compare the dosimetry of four different external beam APBI (EB-APBI) plans: three-dimensional conformal radiation therapy (3D-CRT), intensity-modulated radiation therapy (IMRT), helical tomotherapy (TOMO), and proton beam therapy (PBT)... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
An anthropomorphic phantom study of visualisation of surgical clips for partial breast irradiation (PBI) setup verification.
 
Surgical clips were investigated for partial breast image-guided radiotherapy (IGRT). Small titanium clips were insufficiently well visualised. Medium tantalum clips were best for megavoltage IGRT and small tantalum clips were best for floor mounted kilovoltage IGRT (ExacTrac™). Both small tantalum and medium titanium clips were suitable for isocentric kilovoltage IGRT... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Dosimetric equivalence of nonstandard HDR brachytherapy catheter patterns.
 
To determine whether alternative high dose rate prostate brachytherapy catheter patterns can result in similar or improved dose distributions while providing better access and reducing trauma... [+ leia mais]
Fonte: Medical Physics.
 
 
The effect of rectal heterogeneity on wall dose in high dose rate brachytherapy.
 
When treating prostate cancer using high dose rate (HDR) brachytherapy, overdosing the rectal wall may lead to post-treatment rectal complications. An area of concern is related to how the rectal wall dose is calculated by treatment planning systems (TPSs)... [+ leia mais]
Fonte: Medical Physics.
 
 
Quantifying the Dosimetric Trade-Offs When Using Intensity-Modulated Radiotherapy to Treat Concave Targets Containing Normal Tissues.
 
To quantitatively assess the relationship between intensity-modulated radiotherapy (IMRT)–driven sparing of dose to normal tissues located “within” concave targets with heterogeneity in dose delivered to the target and redistribution of dose to normal tissue beyond the concavity... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Conformity of LINAC-Based Stereotactic Radiosurgery Using Dynamic Conformal Arcs and Micro-Multileaf Collimator.
 
To assess the conformity of dynamic conformal arc linear accelerator-based stereotactic radiosurgery and to describe a standardized method of isodose surface (IDS) selection... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Dosimetric experience with accelerated partial breast irradiation using image-guided interstitial brachytherapy.
 
To present our dosimetric findings with image-guided high-dose-rate interstitial brachytherapy of breast cancer... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Significance of breast boost volume changes during radiotherapy in relation to current clinical interobserver variations.
 
Nowadays, many departments introduce CT images for breast irradiation techniques, aiming to obtain a better accuracy in the definition of the relevant target volumes. However, the definition of the breast boost volume based on CT images requires further investigation, because it may not only vary between observers, but it may also change during the course of treatment... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Commissioning of Volumetric Modulated Arc Therapy (VMAT).
 
Volumetric modulated arc therapy (VMAT) involves the simultaneous use of dynamic multileaf collimator (DMLC) techniques and gantry arcing; appropriate quality assurance is therefore required. This article describes the development and implementation of procedures for commissioning VMAT on a commercial linear accelerator (Elekta PreciseBeam VMAT with MLCi and Beam Modulator heads)... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Optimization of Isocenter Location for Intensity Modulated Stereotactic Treatment of Small Intracranial Targets.
 
To quantify the impact of isocenter location on treatment plan quality for intensity-modulated stereotactic treatment of small intracranial lesions... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Computed tomography for excision cavity localization and 3D-treatment planning in partial breast irradiation with high-dose-rate interstitial brachy..
 
When high-dose-rate brachytherapy is used for partial breast irradiation (PBI) precise pre-implant definition of planning target volume (PTV) and implant geometry is required. After implantation, accurate PTV localization, catheter reconstruction and optimization of dose distribution are needed for good PTV coverage and dose conformity... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Clinical implementation of a new HDR brachytherapy device for partial breast irradiation.
 
The SAVI device has multiple peripheral struts that can be differentially loaded with the HDR source. Planning criteria used for evaluation of the treatment plans included the following dose volume histogram (DVH) criteria: V90 >90%, V150 <50cc and V200 <20cc... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Link para o download da última versão do TRS398 de 5 de junho de 2006.
 
"Maiores informações na página da AIEA: http://www-naweb.iaea.org/nahu/dmrp/codeofpractice.shtm..." [+ leia mais]
Colaborador: Laura Natal Rodrigues.
Fonte: AIEA.
 
 
Prediction of DVH parameter changes due to setup errors for breast cancer treatment based on 2D portal dosimetry.
 
Electronic portal imaging devices (EPIDs) are increasingly used for portal dosimetry applications. In our department, EPIDs are clinically used for two-dimensional (2D) transit dosimetry. Predicted and measured portal dose images are compared to detect dose delivery errors caused for instance by setup errors or organ motion... [+ leia mais]
Fonte: Medical Physics.
 
 
In vivo verification of superficial dose for head and neck treatments using intensity-modulated techniques.
 
Skin dose is one of the key issues for clinical dosimetry in radiation therapy. Currently planning computer systems are unable to accurately predict dose in the buildup region, leaving ambiguity as to the dose levels actually received by the patient|s skin during radiotherapy... [+ leia mais]
Fonte: Medical Physics.
 
 
Report on a randomized trial comparing two forms of immobilization of the head for fractionated stereotactic radiotherapy.
 
Fractionated stereotactic radiotherapy (SRT) requires accurate and reproducible immobilization of the patient|s head. This randomized study compared the efficacy of two commonly used forms of immobilization used for SRT. Two routinely used methods of immobilization, which differ in their approach to reproduce the head position from day to day, are the Gill–Thomas–Cosman (GTC) frame and the BrainLab thermoplastic mask... [+ leia mais]
Fonte: Medical Physics.
 
 
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