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A treatment planning study comparing helical tomotherapy with intensity-modulated radiotherapy for the treatment of anal cancer
 
"Purpose A planning study to compare helical tomotherapy (HT) and intensity-modulated radiotherapy (IMRT) for the treatment of anal canal cancer." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Optimizing dose prescription in stereotactic body radiotherapy for lung tumours using Monte Carlo dose calculation
 
"Purpose To define a method of dose prescription employing Monte Carlo (MC) dose calculation in stereotactic body radiotherapy (SBRT) for lung tumours aiming at a dose as low as possible outside of the PTV." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
I-125 seed planning: An alternative method of urethra definition
 
"Background and purpose To investigate the use of aerated aqueous gel rather than a catheter to define the urethra during permanent I-125 seed implant planning." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Evolution of surface-based deformable image registration for adaptive radiotherapy of non-small cell lung cancer (NSCLC)
 
"Background To evaluate the performance of surface-based deformable image registration (DR) for adaptive radiotherapy of non-small cell lung cancer (NSCLC). " [+ leia mais]
Fonte: Radiation Oncology
 
 
Monte Carlo modeling of 60 Co HDR brachytherapy source in water and in different solid water phantom materials
 
The reference medium for brachytherapy dose measurements is water. Accuracy of dose measurements of brachytherapy sources is critically dependent on precise measurement of the source-detector distance. [+ leia mais]
Colaborador: Gabriela Reis dos Santos
Fonte: Journal of Medical Physics
 
 
Automated medical image segmentation techniques
 
Accurate segmentation of medical images is a key step in contouring during radiotherapy planning. Computed topography (CT) and Magnetic resonance (MR) imaging are the most widely used radiographic techniques in diagnosis, clinical studies and treatment planning. [+ leia mais]
Colaborador: Gabriela Reis dos Santos
Fonte: Journal of Medical Physics
 
 
The traditional L-shaped gantry for radiotherapy linear accelerators will soon become obsolete
 
With the advent of new technologies such as TomoTherapy, the GammaKnife, and the CyberKnife, radiotherapy treatment machines are beginning to look a lot different from the traditional L-shaped design of linear accelerators that we have used for the past 40 years or so [+ leia mais]
Colaborador: Laura Natal Rodrigues
Fonte: Medical Physics
 
 
Comparing planning time, delivery time and plan quality for IMRT, RapidArc and Tomotherapy
 
The purpose of this study is to examine plan quality, treatment planning time, estimated treatment delivery time and other dose metrics for 5 and 9 field sliding window IMRT (IMRT5 and IMRT9), single and dual arc Rapid Arc (RA1 and RA2) and Tomotherapy (TOMO). [+ leia mais]
Colaborador: Fábio Strina Juliasz
Fonte: Journal of Applied Clinical Medical Physics
 
 
Dose consumption for quality assurance and maintenance at a dedicated IORT accelerator
 
Dedicated accelerators for intraoperative radiation therapy (IORT) are operated at high dose rates in order to achieve short treatment times within which the anaesthetisized patient must be remotely monitored, e.g. via video cameras and telemetric anesthesia instruments. [+ leia mais]
Colaborador: Fábio Strina Juliasz
Fonte: Journal of Applied Clinical Medical Physics
 
 
Physical derivation of nomograms in permanent prostate brachytherapy
 
"To demonstrate the physical origin of nomograms in permanent prostate brachytherapy, by using the correlation between fractional integral target dose (FITD) and target volume. " [+ leia mais]
Colaborador: Fábio Strina Juliasz
Fonte: Brachytherapy
 
 
Dosimetric verification of IMAT delivery with a conventional EPID system and a commercial portal dose image prediction tool
 
The electronic portal imaging device (EPID) is a system for checking the patient setup; as a result of its integration with the linear accelerator and software customized for dosimetry, it is increasingly used for verification of the delivery of fixed-field intensity-modulated radiation therapy (IMRT). [+ leia mais]
Colaborador: Fabio Strina Juliasz
Fonte: Medical Physics
 
 
Three-dimensional conformal radiation therapy for squamous cell carcinoma of the esophagus: A prospective phase I/II study
 
"Purpose A prospective phase I–II study was conducted to determine the tolerance and local control rate of three-dimensional conformal radiotherapy (3-DCRT) for esophageal squamous cell carcinoma (SCC)." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Optimal gantry angles and field sizes in kilovoltage cone-beam tomosynthesis for set-up of women with breast cancer undergoing radiotherapy treatment
 
"Abstract Optimal beam geometry for kilovoltage cone-beam tomosynthesis (CB-TS) imaging for the set-up of 20 patients with breast cancer was analyzed and presented for prone and supine scenarios. Gantry angles and field sizes that allow maximum clearance and minimum dose to normal organs from kilovoltage imaging were determined for medial and lateral arcs." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Optimal gantry angles and field sizes in kilovoltage cone-beam tomosynthesis for set-up of women with breast cancer undergoing radiotherapy treatment
 
"Abstract Optimal beam geometry for kilovoltage cone-beam tomosynthesis (CB-TS) imaging for the set-up of 20 patients with breast cancer was analyzed and presented for prone and supine scenarios. Gantry angles and field sizes that allow maximum clearance and minimum dose to normal organs from kilovoltage imaging were determined for medial and lateral arcs." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Unintended exposure in radiotherapy: Identification of prominent causes
 
"Background and purpose Unintended exposures in radiotherapy are likely to occur when certain conditions that favour such exposures exist. Based on the frequency of occurrence of various causes of 100 events of unintended exposures in radiotherapy as derived from the analysis of published reports, a checklist for assessing the vulnerability of radiotherapy facilities for potential accidents has been prepared. The list presents items to be considered for safety critical assessments of a radiotherapy department for the improvement of patient safety and the entire radiotherapy processes." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
ExacTrac X-ray 6 degree-of-freedom image-guidance for intracranial non-invasive stereotactic radiotherapy: Comparison with kilo-voltage cone-beam CT
 
"Background and purpose To compare the residual setup errors measured with ExacTrac X-ray 6 degree-of-freedom (6D) and cone-beam computed tomography (CBCT) for a head phantom and patients receiving intracranial non-invasive fractionated stereotactic radiotherapy (SRT)." [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Commissioning experience and quality assurance of helical tomotherapy machines
 
A helical tomotherapy machine combines a straight 6 MV linear accelerator mounted on a ring gantry with CT technology for image-guided intensity-modulated radiation therapy (IMRT) treatment. [+ leia mais]
Fonte: Jounal of Medical Physics
 
 
Comparison of gating around end-expiration and end-inspiration in radiotherapy for lung cancer
 
"Purpose To evaluate the advantages and disadvantages of gating around end-expiration and end-inspiration. " [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
4D-CT-based target volume definition in stereotactic radiotherapy of lung tumours: Comparison with a conventional technique using individual margins
 
"Purpose To investigate the dosimetric benefit of integration of 4D-CT in the planning target volume (PTV) definition process compared to conventional PTV definition using individual margins in stereotactic body radiotherapy (SBRT) of lung tumours. " [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Evaluation of surface-based deformable image registration for adaptive radiotherapy of non-small cell lung cancer (NSCLC)
 
"Background To evaluate the performance of surface-based deformable image registration (DR) for adaptive radiotherapy of non-small cell lung cancer (NSCLC). " [+ leia mais]
Fonte: Radiation Oncology
 
 
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