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ABFM NEWS - Radioterapia
 
Evaluation of the impact of dental artefacts on intensity-modulated radiotherapy planning for the head and neck
 
High density materials create severe artefacts in the computed tomography (CT) scans used for radiotherapy dose calculations. Increased use of intensity-modulated radiotherapy (IMRT) to treat oropharyngeal cancers raises concerns over the accuracy of the resulting dose calculation. This work quantifies their impact and evaluates a simple corrective technique. [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
The effect of planning algorithms in oesophageal radiotherapy in the context of the SCOPE 1 trial
 
The effect of planning algorithms in oesophageal radiotherapy in the context of the SCOPE 1 trial [+ leia mais]
Fonte: Radiotherapy and Oncology
 
 
Comparison of gating around end-expiration and end-inspiration in radiotherapy for lung cancer
 
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
 
o 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
 
 
"An EPID based method for efficient and precise asymmetric jaw alignment quality assurance"
 
"The aim of this work was to investigate the use of amorphous silicon electronic portal imaging devices (EPIDs) for regular quality assurance of linear accelerator asymmetric jaw junctioning. " [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Physics
 
 
"Influence of volumes of prostate, rectum, and bladder on treatment planning CT on interfraction prostate shifts during ultrasound image-guided IMRT"
 
"The purpose of this study was to analyze the relationship between prostate, bladder, and rectum volumes on treatment planning CT day and prostate shifts in the XYZ directions on treatment days. " [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Physics
 
 
"High-DQE EPIDs based on thick, segmented BGO and CsI:Tl scintillators: Performance evaluation at extremely low dose"
 
Electronic portal imaging devices (EPIDs) based on active matrix, flat-panel imagers (AMFPIs) have become the gold standard for portal imaging and are currently being investigated for megavoltage cone-beam computed tomography (CBCT) and cone-beam digital tomosynthesis (CBDT). [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Physics
 
 
The effect of interfraction prostate motion on IMRT plans: a dose-volume histogram analysis using a Gaussian error function model
 
"Abstract The Gaussian error function model, containing pairs of error and complementary error functions, was used to carry out cumulative dose-volume histogram (cDVH) analysis on prostate intensity modulated radiation therapy (IMRT) plans with interfraction prostate motion." [+ leia mais]
Colaborador: Fábio Strina Juliasz
Fonte: Journal of Applied Clinical Medical Physics
 
 
Effect of Collimator and Couch Angle Change on Breast IMRT Dose Distributions
 
"Abstract Intensity modulated tangential photon beams for breast cancer treatment can improve the dose uniformity significantly throughout the whole breast and reduce the dose to the lung and the heart comparing with the conventional technique. Before the first treatment, patient setup may require a change on the collimator angle and/or the couch angle based on the chest wall coverage according to the port films. " [+ leia mais]
Colaborador: Fábio Strina Juliasz
Fonte: Journal of Applied Clinical Medical Physics
 
 
High-dose-rate brachytherapy in combination with conformal external beam radiotherapy in the treatment of prostate cancer
 
"Purpose To report long-term outcomes for treatment of prostate cancer using dose escalation with high-dose-rate (HDR) brachytherapy and 3-dimensional conformal external beam radiotherapy (3DCRT), and compare them with outcomes for treatment of prostate cancer with 3DCRT alone at the same institution. " [+ leia mais]
Colaborador: Fábio Strina Juliasz
Fonte: Brachyterapy
 
 
Do high radiation doses in locally advanced prostate cancer patients treated with 103Pd implant plus external beam irradiation cause increased urinary
 
"Purpose To investigate the morbidity of higher radiation doses in prostate cancer patients. " [+ leia mais]
Colaborador: Fabio Strina Juliasz
Fonte: Brachytherapy
 
 
"An integral quality monitoring system for real-time verification of intensity modulated radiation therapy"
 
"Purpose: To develop an independent and on-line beam monitoring system, which can validate the accuracy of segment-by-segment energy fluence delivery for each treatment field. The system is also intended to be utilized for pretreatment dosimetric quality assurance of intensity modulated radiation therapy (IMRT), on-line image-guided adaptive radiation therapy, and volumetric modulated arc therapy. " [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Phisycs
 
 
"Evaluation of similarity measures for use in the intensity-based rigid 2D-3D registration for patient positioning in radiotherapy"
 
"Purpose: Rigid 2D-3D registration is an alternative to 3D-3D registration for cases where largely bony anatomy can be used for patient positioning in external beam radiation therapy. In this article, the authors evaluated seven similarity measures for use in the intensity-based rigid 2D-3D registration using a variation in Skerl|s similarity measure evaluation protocol. " [+ leia mais]
Colaborador: Érika Yumi Watanabe
Fonte: Medical Physics
 
 
High–Dose Rate Brachytherapy Using Inverse Planning Simulated Annealing for Locoregionally Advanced Cervical Cancer: A Clinical Report With 2-Year Fol
 
"Purpose We present clinical outcomes of image-guided brachytherapy using inverse planning simulated annealing (IPSA) planned high–dose rate (HDR) brachytherapy boost for locoregionally advanced cervical cancer. " [+ leia mais]
Fonte: Int Journal of Radiation Oncology Biology Physics
 
 
Integrated-boost IMRT or 3-D-CRT using FET-PET based auto-contoured target volume delineation for glioblastoma multiforme - a dosimetric comparison
 
"Background Biological brain tumor imaging using O-(2-[18F]fluoroethyl)-L-tyrosine (FET)-PET combined with inverse treatment planning for locally restricted dose es-calation in patients with glioblastoma multiforme seems to be a promising approach. " [+ leia mais]
Fonte: Radiation Oncology
 
 
Three-Dimensional Volumetric Analysis of Irradiated Lung With Adjuvant Breast Irradiation
 
"Purpose To retrospectively evaluate the dose–volume histogram data of irradiated lung in adjuvant breast radiotherapy (ABR) using a three-dimensional computed tomography (3D-CT)–guided planning technique; and to investigate the relationship between lung dose–volume data and traditionally used two-dimensional (2D) parameters, as well as their correlation with the incidence of steroid-requiring radiation pneumonitis (SRRP). " [+ leia mais]
Fonte: Int Journal of Radiation Oncology Biology Physics
 
 
NRC COMPLETES INSPECTION OF MEDICAL ERRORS
 
A special inspection of multiple medical errors during prostate cancer treatments at the Philadelphia Veterans Affairs Medical Center (VA Philadelphia) has revealed eight apparent violations of Nuclear Regulatory Commission (NRC) regulations, the agency said on Wednesday. [+ leia mais]
Colaborador: Laura Natal Rodrigues
Fonte: United States Nuclear Regulatory Commission
 
 
Systematisation of spatial uncertainties for comparison between a MR and a CT-based radiotherapy workflow for prostate treatments
 
In the present work we compared the spatial uncertainties associated with a MR-based workflow for external radiotherapy of prostate cancer to a standard CT-based workflow. [+ leia mais]
Colaborador: Gabriela Reis dos Santos
Fonte: Radiation Oncology
 
 
Obtaining Normal Tissue Constraints Using Intensity Modulated Radiotherapy (IMRT) in Patients with Oral Cavity, Oropharnygeal, and Laryngeal Carcinoma
 
The purpose of this study was to evaluate normal tissue dose constraints while maintaining planning target volume (PTV) prescription without reducing PTV margins. [+ leia mais]
Colaborador: Fábio Strina Juliaz
Fonte: Medical Dosimetry
 
 
High-dose-rate brachytherapy for localized prostate adenocarcinoma post abdominoperineal resection of the rectum and pelvic irradiation: Technique and
 
Treatment options are limited for patients with localized prostate cancer and a prior history of abdominoperineal resection (APR) and pelvic irradiation. We have previously reported on the successful utility of high-dose-rate (HDR) brachytherapy salvage for prostate cancer failing definitive external beam radiation therapy (EBRT). In this report, we describe our technique and early experience with definitive HDR brachytherapy in patients post APR and pelvic EBRT. [+ leia mais]
Colaborador: Fábio Strina Juliasz
Fonte: Brachytherapy
 
 
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