Browsing by Subject "Radiotherapy Dosage"
Now showing items 1-17 of 17
-
A Collimator Setting Optimization Algorithm for Dual-Arc Volumetric Modulated Arc Therapy in Pancreas Stereotactic Body Radiation Therapy.
(Technology in cancer research & treatment, 2019-01)PURPOSE:To optimize collimator setting to improve dosimetric quality of pancreas volumetric modulated arc therapy plan for stereotactic body radiation therapy. MATERIALS AND METHODS:Fifty-five volumetric modulated arc therapy ... -
American Association of Physicists in Medicine Task Group 263: Standardizing Nomenclatures in Radiation Oncology.
(International journal of radiation oncology, biology, physics, 2018-03)A substantial barrier to the single- and multi-institutional aggregation of data to supporting clinical trials, practice quality improvement efforts, and development of big data analytics resource systems is the lack of ... -
Cherenkov emissions for studying tumor changes during radiation therapy: An exploratory study in domesticated dogs with naturally-occurring cancer.
(PloS one, 2020-01)<h4>Purpose</h4>Real-time monitoring of physiological changes of tumor tissue during radiation therapy (RT) could improve therapeutic efficacy and predict therapeutic outcomes. Cherenkov radiation is a normal byproduct of ... -
Clinical assessment and characterization of a dual tube kilovoltage X-ray localization system in the radiotherapy treatment room.
(Journal of applied clinical medical physics, 2008-01-13)INTRODUCTION:Although flat-panel based X-ray imaging has been well tested in diagnostic radiology, its use as an image-guided-radiotherapy (IGRT) system in a treatment room is new and requires systematic assessment. MATERIALS ... -
Delivery efficiency of an Elekta linac under gated operation.
(Journal of applied clinical medical physics, 2014-09-08)In this study, we have characterized the efficiency of an Elekta linac in the delivery of gated radiotherapy. We have explored techniques to reduce the beam-on delay and to improve the delivery efficiency, and have investigated ... -
Development of a neuro-fuzzy technique for automated parameter optimization of inverse treatment planning.
(Radiation oncology (London, England), 2009-01)BACKGROUND: Parameter optimization in the process of inverse treatment planning for intensity modulated radiation therapy (IMRT) is mainly conducted by human planners in order to create a plan with the desired dose distribution. ... -
Diode-based transmission detector for IMRT delivery monitoring: a validation study.
(Journal of applied clinical medical physics, 2016-09-08)The purpose of this work was to evaluate the potential of a new transmission detector for real-time quality assurance of dynamic-MLC-based radiotherapy. The accuracy of detecting dose variation and static/dynamic MLC position ... -
Dosimetric analysis of the alopecia preventing effect of hippocampus sparing whole brain radiation therapy.
(Radiat Oncol, 2015-11-26)BACKGROUND: Whole brain radiation therapy (WBRT) is widely used for the treatment of brain metastases. Cognitive decline and alopecia are recognized adverse effects of WBRT. Recently hippocampus sparing whole brain radiation ... -
Dosimetric assessment of rigid setup error by CBCT for HN-IMRT.
(Journal of applied clinical medical physics, 2010-05-28)Dose distributions in HN-IMRT are complex and may be sensitive to the treatment uncertainties. The goals of this study were to evaluate: 1) dose differences between plan and actual delivery and implications on margin requirement ... -
Effect of machine learning methods on predicting NSCLC overall survival time based on Radiomics analysis.
(Radiation oncology (London, England), 2018-10-05)BACKGROUND:To investigate the effect of machine learning methods on predicting the Overall Survival (OS) for non-small cell lung cancer based on radiomics features analysis. METHODS:A total of 339 radiomic features were ... -
Evaluation of dosimetric uncertainty caused by MR geometric distortion in MRI-based liver SBRT treatment planning.
(Journal of applied clinical medical physics, 2019-02)PURPOSE:MRI-based treatment planning is a promising technique for liver stereotactic-body radiation therapy (SBRT) treatment planning to improve target volume delineation and reduce radiation dose to normal tissues. MR geometric ... -
Genotypes and haplotypes of the VEGF gene and survival in locally advanced non-small cell lung cancer patients treated with chemoradiotherapy.
(BMC cancer, 2010-08-16)Vascular endothelial growth factor (VEGF) is a major mediator of angiogenesis involving in carcinogenesis, including lung cancer. We hypothesized that VEGF polymorphisms may affect survival outcomes among locally advanced ... -
On the sensitivity of TG-119 and IROC credentialing to TPS commissioning errors.
(Journal of applied clinical medical physics, 2016-01-08)We investigate the sensitivity of IMRT commissioning using the TG-119 C-shape phantom and credentialing with the IROC head and neck phantom to treatment planning system commissioning errors. We introduced errors into the ... -
Parameter optimization in HN-IMRT for Elekta linacs.
(Journal of applied clinical medical physics, 2009-04-28)Planning and delivery in HN-IMRT has been challenging for the Elekta linac because of numerous machine limitations. Direct aperture optimization (DAO) algorithms have had success in simplifying the planning process and improving ... -
The role of whole brain radiation therapy in the management of melanoma brain metastases.
(Radiat Oncol, 2014-06-22)BACKGROUND: Brain metastases are common in patients with melanoma, and optimal management is not well defined. As melanoma has traditionally been thought of as "radioresistant," the role of whole brain radiation therapy ... -
Using weighted power mean for equivalent square estimation.
(Journal of applied clinical medical physics, 2017-11)Equivalent Square (ES) enables the calculation of many radiation quantities for rectangular treatment fields, based only on measurements from square fields. While it is widely applied in radiotherapy, its accuracy, especially ... -
Variability in the treatment of elderly patients with stage IIIA (N2) non-small-cell lung cancer.
(J Thorac Oncol, 2013-06)INTRODUCTION: : We evaluated treatment patterns of elderly patients with stage IIIA (N2) non-small-cell lung cancer (NSCLC). METHODS: : The use of surgery, chemotherapy, and radiation for patients with stage IIIA (T1-T3N2M0) ...
