Busque na ABFM:
 
ÁREA RESTRITA
 
 
Esqueci minha senha
 
DESTAQUES
 
 
 
 
 
 
 
 
 
 
ABFM NEWS - Radioterapia
 
Point vs. volumetric bladder and rectal doses in combined intracavitary-interstitial high-dose-rate brachytherapy: Correlation and comparison with...
 
We correlated rectal and bladder point and volumetric dose data in patients treated for advanced cervix cancers with combined intracavitary-interstitial high-dose-rate (HDR) brachytherapy (BT). The results are compared with published Vienna applicator data... [+ leia mais]
Fonte: Brachytherapy.
 
 
Brachytherapy in endometrial cancer: Quantification of air gaps around a vaginal cylinder.
 
Vaginal vault brachytherapy, prescribed to 0.5cm, is used in endometrial cancer postoperatively to reduce the risk of vault recurrence. However, it is unknown if the vaginal mucosa is closely opposed to the vaginal cylinder, or if air gaps lift the mucosa from the cylinder. The aim of this study was to quantify the extent, magnitude, and effect on dose of any air gaps around the vaginal cylinder using CT-scan images... [+ leia mais]
Fonte: Brachytherapy.
 
 
A Method to Estimate Mean Position, Motion Magnitude, Motion Correlation, and Trajectory of a Tumor From Cone-Beam CT Projections for Image-Guided...
 
To develop a probability-based method for estimating the mean position, motion magnitude, and trajectory of a tumor using cone-beam CT (CBCT) projections... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Impact of Manual and Automated Interpretation of Fused PET/CT Data on Esophageal Target Definitions in Radiation Planning.
 
We compare CT-only based esophageal tumor definition with two PET/CT based methods: (1) manual contouring and (2) a semiautomated method based on specific thresholds... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Deformation of Prostate and Seminal Vesicles Relative to Intraprostatic Fiducial Markers.
 
To quantify the residual geometric uncertainties after on-line corrections with intraprostatic fiducial markers, this study analyzed the deformation of the prostate and, in particular, the seminal vesicles relative to such markers... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Second cancers in children treated with modern radiotherapy techniques.
 
The scattered radiation from the treatment volume might be more significant for children than for adults and, as a consequence, modern radiotherapy treatment techniques such as IMRT and passive proton therapy could potentially increase the number of secondary cancers. In this report, secondary cancer risk resulting from new treatment technologies was estimated for an adult prostate patient and a child... [+ leia mais]
Colaborador: Camila pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Cost-effectiveness of particle therapy: Current evidence and future needs.
 
Questions are being raised regarding the cost of particle therapy (PT), and with them criticism that PT is too expensive to allow the expected gain in effectiveness. This paper aims to get more insight in the cost and cost-effectiveness of particle therapy and to discuss a future strategy that allows for critical assessment of this health technology... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
A verification study of proposed pelvic lymph node localisation guidelines using nanoparticle-enhanced magnetic resonance imaging.
 
Normal sized pelvic lymph nodes are not easily identifiable on conventional imaging, but can be visualised with contrast-enhanced magnetic resonance imaging (MRI) using intravenous ultra-small particles of iron-oxide (USPIO)... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Inter-fraction bladder filling variations and time trends for cervical cancer patients assessed with a portable 3-dimensional ultrasound bladder...
 
For cervical cancer patients, bladder filling variations may result in inadequate EBRT target coverage, unless large safety margins are used. For a group of patients who received full bladder instructions, inter-fraction variations and time trends in bladder volume were quantified, and a 3D ultrasound (US) scanner was tested for on-line bladder volume measurements... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Dosimetric characteristics of linear accelerator photon beams with small monitor unit settings.
 
Several studies on the effect of tumor cell killing by dose rate variation have implied that the use of a shorter treatment time is more favorable for intensity modulated radiation therapy (IMRT). Aiming at step-and-shoot IMRT with higher dose rates... [+ leia mais]
Fonte: Medical Physics.
 
 
Evaluation of a new IR-guided system for mechanical QA of linear accelerators.
 
The authors report the development of a new procedure for mechanical quality assurance of linear accelerators using an infrared-guided system. The system consists of an infrared (IR) camera and an IR-reflective marker that can be.. [+ leia mais]
Fonte: Medical Physics.
 
 
Quantitative Ultrasound Characterization of Cancer Radiotherapy Effects In Vitro.
 
Currently, no routinely used imaging modality is available to assess tumor responses to cancer treatment within hours to days after radiotherapy. In this study, we demonstrate the preclinical application of quantitative ultrasound methods to characterize the cellular responses to cancer radiotherapy in vitro... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Multicriteria Optimization in Intensity-Modulated Radiation Therapy Treatment Planning for Locally Advanced Cancer of the Pancreatic Head.
 
Multicriteria optimization (MCO) may reduce the time-consuming iteration loop necessary to develop a satisfactory plan while providing information regarding trade-offs between different treatment planning goals... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy.
 
A treatment planning study was performed to evaluate the performance of the novel volumetric modulated single arc radiotherapy on cervix uteri cancer patients. Conventional fixed field IMRT was used as benchmark... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Abdominal cancer during early childhood: A dosimetric comparison of proton beams to standard and advanced photon radiotherapy.
 
Treatment planning was performed for five Neuroblastoma (NBL) and four Wilms Tumor (WT) patients. Opposing fields (2F), photon intensity modulated radiotherapy (IMXT) and two proton techniques (passively scattered (PT) and scanned beams (IMPT)) were considered... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Modeling of carbon fiber couch attenuation properties with a commercial treatment planning system.
 
The purpose of this work is to evaluate the modeling of carbon fiber couch attenuation properties with a commercial treatment planning system (TPS, Pinnacle3, v8.0d). A carbon fiber couch (BrainLab) was incorporated into the TPS by automatic contouring of all transverse CT slices... [+ leia mais]
Fonte: Medical Physics.
 
 
Equivalent phantom sizes and shapes for brachytherapy dosimetric studies of 192Ir and 137Cs.
 
The impact of phantom size and shape in brachytherapy dosimetry was assessed using Monte Carlo methods in liquid water for 192Ir and 137Cs point sources... [+ leia mais]
Fonte: Medical Physics.
 
 
Evaluating the influence of the Siemens IGRT carbon fibre tabletop in head and neck IMRT.
 
To investigate the impact of a commercial IMRT/IGRT carbon-fibre tabletop in radiotherapy planning optimization and clinical dose distribution... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Correlation between pretreatment FDG-PET biological target volume and anatomical location of failure after radiation therapy for head and neck cancers
 
To assess whether the pretreatment FDG-PET-defined biologic target volume (PET-BTV) correlates with the anatomical sites of loco-regional failure (LRF) after RT for head and neck cancer (HNC)... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
A Treatment Planning Investigation Into the Dosimetric Effects of Systematic Prostate Patient Rotational Set-Up Errors .
 
The purpose of this study was to investigate the potential dosimetric effects of systematic rotational setup errors on prostate patients planned according to the RTOG P-0126 protocol, and to identify rotational tolerances about either the anterior-posterior (AP) or left-right (LR) axis... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Medical Dosimetry.
 
 
Páginas: 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27
 
WEBMAIL
 
 
Dúvidas?
Esqueceu sua senha?
 
ABFM - ASSOCIAÇÃO BRASILEIRA DE FÍSICA MÉDICA - CNPJ 02.091.077/0001-40