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ABFM NEWS - Radioterapia
 
Clinical implementation of enhanced dynamic wedges into the Pinnacle treatment planning system: Monte Carlo validation and patient-specific QA.
 
The goal of this work is to present a systematic Monte Carlo validation study on the clinical implementation of the enhanced dynamic wedges (EDWs) into the Pinnacle (Philips Medical Systems, Fitchburg, WI) treatment planning system (TPS) and QA procedures for patient plan verification treated with EDWs... [+ leia mais]
Fonte: Physics in Medicine and Biology.
 
 
In Vivo Dosimetry Using a Linear Mosfet-Array Dosimeter to Determine the Urethra Dose In 125I Permanent Prostate Implants.
 
In vivo dosimetry during brachytherapy of the prostate with 125I seeds is challenging because of the high dose gradients and low photon energies involved. We present the results of a study using metal-oxide-semiconductor field-effect transistor (MOSFET) dosimeters to evaluate the dose in the urethra after a permanent prostate implantation procedure... [+ leia mais]
Fonte: Int J Radiat Oncol Biol Phys.
 
 
Single-Arc IMRT?
 
The idea of delivering intensity-modulated radiation therapy (IMRT) with a multileaf collimator in a continuous dynamic mode during a single rotation of the gantry has recently gained momentum both in research and industry... [+ leia mais]
Fonte: Physics in Medicine and Biology.
 
 
The safety and efficacy of robotic image-guided radiosurgery system treatment for intra- and extracranial lesions: A systematic review...
 
The CyberKnife is a new, frameless stereotactic radiosurgery system. This work reviews its safety and efficacy in the treatment of intra- and extracranial lesions... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Radioterapia en plena operación.
 
La cirugía oncológica se hace cada vez más por laparoscopia, y la radioterapia, también. En lo que es una experiencia pionera, 17 pacientes operados de cáncer de recto por laparoscopia en el hospital Gregorio Marañón de Madrid han recibido la radioterapia en la misma operación y por la misma vía: a través de una incisión y un tubo muy pequeño... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: El Pais.
 
 
ICRU reference dose in an era of intensity-modulated radiation therapy clinical trials: Correlation with planning target volume mean dose and...
 
IMRT clinical trials lack dose prescription and specification standards similar to ICRU standards for two- and three-dimensional external beam planning. In this study, we analyzed dose distributions for patients whose treatment plans incorporated IMRT, and compared the dose determined at the ICRU reference point to the PTV doses determined from dose–volume histograms. Additionally, we evaluated if ICRU reference type single-point dose prescriptions are suitable for IMRT dose prescriptions... [+ leia mais]
Colaborador: Camila Passoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Dosimetric verification of radiotherapy treatment planning systems: Results of IAEA pilot study.
 
The methodology developed by IAEA for dosimetric quality control of treatment planning systems has been tested in different hospitals through a pilot study. The aim was to verify the methodology and observe the range of deviations between planned and delivered doses in 3D conformal radiotherapy in situations close to a clinical setting... [+ leia mais]
Colaborador: Camila Passoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Moving from IMRT QA measurements toward independent computer calculations using control charts.
 
In this study, we investigated IMRT QA using Statistical Process Control for the purpose of comparing the processes of patient-specific measurements and the corresponding independent computer calculations... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Detection of intrafractional tumour position error in radiotherapy utilizing cone beam computed tomography.
 
To study the intrafraction tumour position error utilizing cone beam CT (CBCT) in patients receiving radiotherapy... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Phantom evaluation of a commercially available three modality image guided radiation therapy system.
 
Specifically, they present modulation transfer function curves for megavoltage planar, kilovoltage (kV) planar, and cone beam computed tomography imaging systems and compare these with conventional computed tomography... [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: Medical Physics.
 
 
Comparison of peripheral dose from image-guided radiation therapy (IGRT) using kV cone beam CT to intensity-modulated radiation therapy (IMRT).
 
The growing use of IMRT with volumetric kilovoltage cone-beam computed tomography (kV-CBCT) for IGRT has increased concerns over the additional (typically unaccounted) radiation dose associated with the procedures. Published data quantify the in-field dose of IGRT and the peripheral dose from IMRT. This study adds to the data on dose outside the target area by measuring peripheral CBCT dose and comparing it with out-of-field IMRT dose... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Utilize target motion to cover clinical target volume (ctv) – a novel and practical treatment planning approach to manage respiratory motion.
 
To use probability density function (PDF) to model motion effects and incorporate this information into treatment planning for lung cancers... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Dosimetric comparison of IMRT vs. 3D conformal radiotherapy in the treatment of cancer of the cervical esophagus.
 
Radiotherapy planning for cervical esophageal cancer is challenging. We compared IMRT and 3D conformal radiotherapy (CRT) with respect to conformality of target coverage and normal tissue sparing... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Intensity modulation with photons for benign intracranial tumours: A planning comparison of volumetric single arc, helical arc and fixed gantry...
 
The potential benefits and limitations of the new RapidArc treatment concept compared to Helical Tomotherapy and fixed gantry intensity modulation techniques have been assessed at treatment planning level on 12 patients presenting with ‘benign’ brain tumours... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Clinical application of radiophotoluminescent glass dosimeter for dose verification of prostate HDR procedure.
 
High dose rate brachytherapy (HDR-BT) is one of the many modalities for prostate cancer treatment. Due to the nature of HDR-BT, in vivo dosimetry is feasible and can be used to verify consistent dose delivery... [+ leia mais]
Fonte: Medical Physics.
 
 
Monte Carlo dosimetry for 125I and 103Pd eye plaque brachytherapy.
 
A Monte Carlo study of dosimetry for eye plaque brachytherapy is performed. BrachyDose, an EGSnrc user code which makes use of Yegin|s multi-geometry package, is used to fully model 125I (model 6711) and 103Pd (model 200) brachytherapy seeds and the standardized plaques of the Collaborative Ocular Melanoma Study (COMS)... [+ leia mais]
Fonte: Medical Physics.
 
 
Absolute and relative dose measurements with GafchromicTM EBT film for high energy electron beams with different doses per pulse.
 
The authors have evaluated the accuracy, in absolute and relative dose measurements, of the GafchromicTM EBT film in pulsed high-energy electron beams... [+ leia mais]
Fonte: Medical Physics.
 
 
Technical note: Heterogeneity dose calculation accuracy in IMRT: Study of five commercial treatment planning systems using an anthropomorphic thorax..
 
The purpose of this study was to determine the accuracy of five commonly used intensity-modulated radiation therapy (IMRT) treatment planning systems (TPSs)... [+ leia mais]
Fonte: Medical Physics.
 
 
The impact of prescription depth, dose rate, plaque size, and source loading on the central axis using 103Pd, 125I, and 131Cs.
 
Modern dosimetry data are not available for Collaborative Ocular Melanoma Study-based eye plaques. This report aims to provide these data for eye plaques ranging from 10 to 22mm, and for three different low-energy, photon-emitting radionuclides... [+ leia mais]
Fonte: Brachytherapy.
 
 
Concepts for critical organ dosimetry in three-dimensional image-based breast brachytherapy.
 
To investigate dose–volume histogram (DVH) parameters for organs at risk (OARs) in sectional three-dimensional image-based accelerated partial breast irradiation... [+ leia mais]
Fonte: Brachytherapy.
 
 
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