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ABFM NEWS - Radioterapia
 
Direct tumor in vivo dosimetry in highly-conformal radiotherapy: A feasibility study of implantable MOSFETs for hypofractionated extracranial treatmen
 
urpose: In highly-conformal radiotherapy, due to the complexity of both beam configurations and dose distributions, traditional in vivo dosimetry is unpractical or even impossible. [+ leia mais]
Fonte: Medical Physics
 
 
Dose recalculation in megavoltage cone-beam CT for treatment evaluation: Removal of cupping and truncation artefacts in scans of the thorax and abdome
 
"Purpose To correct megavoltage cone-beam CT (MVCBCT) images of the thorax and abdomen for cupping and truncation artefacts to reconstruct the 3D-delivered dose distribution for treatment evaluation." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Variation of treatment planning parameters (D90 HR-CTV, D2cc for OAR) for cervical cancer tandem ring brachytherapy in a multicentre setting: Comparis
 
"Purpose To perform a qualitative and quantitative comparison of different treatment planning methods used in different centres for MRI-based brachytherapy (BT) of cervical cancer." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Variation of treatment planning parameters (D90 HR-CTV, D2cc for OAR) for cervical cancer tandem ring brachytherapy in a multicentre setting: Comparis
 
"Purpose To perform a qualitative and quantitative comparison of different treatment planning methods used in different centres for MRI-based brachytherapy (BT) of cervical cancer." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Unilateral radiotherapy for tonsil cancer: Potential dose distribution optimization with a simple two-field intensity-modulated radiation therapy beam
 
"Background and purpose To evaluate the feasibility and dosimetric optimization potential of a unilateral two-field intensity-modulated radiotherapy (IMRT) technique in the curative treatment of lateralized tonsil cancer." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Comparison of electron IMRT to helical photon IMRT and conventional photon irradiation for treatment of breast and chest wall tumours
 
"Abstract Background and purpose Conventional irradiation of breast and chest wall tumours may cause high doses in underlying organs. Intensity-modulated radiation therapy (IMRT) with photons achieves high conformity between treated and tumour volume but is associated with considerable low-dose effects which may induce secondary malignancies. We compare treatment plans of electron IMRT to helical photon IMRT and conventional irradiation." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Accelerated partial-breast irradiation using high-dose-rate interstitial brachytherapy: 12-year update of a prospective clinical study
 
"Background and purpose To report the 12-year updated results of accelerated partial-breast irradiation (APBI) using multicatheter interstitial high-dose-rate (HDR) brachytherapy (BT)." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Multiinstitutional study on target volume delineation variation in breast radiotherapy in the presence of guidelines
 
"Purpose This study aims to determine magnitude, causes and consequences of post-operative breast tumour target volume delineation variation among radiation oncologists in the presence of guidelines." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Cone Beam CT Imaging Analysis of Interfractional Variations in Bladder Volume and Position During Radiotherapy for Bladder Cancer
 
"Purpose To quantify daily bladder size and position variations during bladder cancer radiotherapy. Methods and Materials Ten bladder cancer patients underwent daily cone beam CT (CBCT) imaging of the bladder during radiotherapy. Bladder and planning target volumes (bladder/PTV) from CBCT and planning CT scans were compared with respect to bladder center-of-mass shifts in the x (lateral), y (anterior-posterior), and z (superior-inferior) coordinates, bladder/PTV size, bladder/PTV margin positions, overlapping areas, and mutually exclusive regions. " [+ leia mais]
Fonte: Int Journal of Radiation Oncology Biology Physics
 
 
"Evaluation of delivered monitor unit accuracy of gated step-and-shoot IMRT using a two-dimensional detector array"
 
"Purpose: To overcome the problem of organ motion in intensity-modulated radiation therapy (IMRT), gated IMRT is often used for the treatment of lung cancer. In this study, the authors investigated the accuracy of the delivered monitor units (MUs) from each segment during gated IMRT using a two-dimensional detector array for user-specific verification purpose. " [+ leia mais]
Fonte: Medical Physics
 
 
"Reference radiochromic film dosimetry in kilovoltage photon beams during CBCT image acquisition"
 
Purpose: A common approach for dose assessment during cone beam computed tomography (CBCT) acquisition is to use thermoluminescent detectors for skin dose measurements (on patients or phantoms) or ionization chamber (in phantoms) for body dose measurements. [+ leia mais]
Fonte: Medical Physics
 
 
Target volume definition for external beam partial breast radiotherapy: Clinical, pathological and technical studies informing current approaches
 
"Abstract Partial breast irradiation (PBI) is currently under investigation in several phase III trials and, following a recent consensus statement, its use off-study may increase despite ongoing uncertainty regarding optimal target volume definition. We review the clinical, pathological and technical evidence for target volume definition in external beam partial breast irradiation (EB-PBI). " [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Better radiation weighting factors for neutrons generated from proton treatment are needed
 
In radiation treatment of cancer, protons and other heavy charged particles offer an attractive clinical advantage when compared to X-rays with respect to healthy-tissue sparing afforded by the charged-particle Bragg peak. [+ leia mais]
Colaborador: Laura Natal Rodrigues
Fonte: Radiation Protection Dosimetry
 
 
Radiometric survey of teletherapy treatment rooms in Brazil
 
The Brazilian national regulatory authority, National Commission of Nuclear Energy, requires that dose rates in the vicinity of teletherapy treatment rooms do not exceed the permissible limits for workers as well as members of the public, depending on the place considered. [+ leia mais]
Colaborador: Laura Natal Rodrigues
Fonte: Radiation Protection Dosimetry
 
 
Comparison of Elekta VMAT with helical tomotherapy and fixed field IMRT: Plan quality, delivery efficiency and accuracy
 
Purpose: Helical tomotherapy (HT) and volumetric modulated arc therapy (VMAT) are arc-based approaches to IMRT delivery. The objective of this study is to compare VMAT to both HT and fixed field IMRT in terms of plan quality, delivery efficiency, and accuracy. [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Physics
 
 
Purpose: The aim of this study is to investigate radioprotection issues that must be addressed when dedicated accelerators for intraoperative radiothe
 
"Purpose To determine intra-fraction displacement of the prostate gland from imaging pre- and post-radiotherapy delivery of prostate cancer patients with three implanted fiducial markers. " [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Radiation protection measurements around a 12 MeV mobile dedicated IORT accelerator
 
Purpose: The aim of this study is to investigate radioprotection issues that must be addressed when dedicated accelerators for intraoperative radiotherapy (IORT) are used in operating rooms. [+ leia mais]
Fonte: Medical Physics
 
 
Analysis of deformable image registration accuracy using computational modeling
 
Computer aided modeling of anatomic deformation, allowing various techniques and protocols in radiation therapy to be systematically verified and studied, has become increasingly attractive. [+ leia mais]
Fonte: Medical Physics
 
 
A diamond target for megavoltage cone-beam CT
 
"Purpose: To determine the properties of a megavoltage cone-beam CT system using the unflattened beam from a sintered diamond target at 4 and 6 MV. " [+ leia mais]
Colaborador: Cássio Vilela Komatsu
Fonte: Medical Physics
 
 
Radiotherapy Treatment Plans With RapidArc for Prostate Cancer Involving Seminal Vesicles and Lymph Nodes
 
"Purpose Dosimetric results and treatment delivery efficiency of RapidArc plans to those of conventional intensity-modulated radiotherapy (IMRT) plans were compared using the Eclipse treatment planning system for high-risk prostate cancer. " [+ leia mais]
Colaborador: Laura Natal Rodrigues
Fonte: Int Journal of Radiation Oncology Biology Physics
 
 
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