Browsing by Subject "Radiotherapy Planning, Computer-Assisted"
Now showing items 1-20 of 21
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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 ... -
A positioning QA procedure for 2D/2D (kV/MV) and 3D/3D (CT/CBCT) image matching for radiotherapy patient setup.
(Journal of applied clinical medical physics, 2009-10-06)A positioning QA procedure for Varian's 2D/2D (kV/MV) and 3D/3D (planCT/CBCT) matching was developed. The procedure was to check: (1) the coincidence of on-board imager (OBI), portal imager (PI), and cone beam CT (CBCT)'s ... -
Adaptive stereotactic body radiation therapy planning for lung cancer.
(Int J Radiat Oncol Biol Phys, 2013-09-01)PURPOSE: To investigate the dosimetric effects of adaptive planning on lung stereotactic body radiation therapy (SBRT). METHODS AND MATERIALS: Forty of 66 consecutive lung SBRT patients were selected for a retrospective ... -
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 ... -
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 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 an electron Monte Carlo dose calculation algorithm for electron beam.
(Journal of applied clinical medical physics, 2008-06-23)The electron Monte Carlo (eMC) dose calculation algorithm of the Eclipse treatment planning system is based heavily upon Monte Carlo simulation of the linac head and modeling of the linac beam characteristics with minimal ... -
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 ... -
Imaging system QA of a medical accelerator, Novalis Tx, for IGRT per TG 142: our 1 year experience.
(Journal of applied clinical medical physics, 2012-07-05)American Association of Physicists in Medicine (AAPM) task group (TG) 142 has recently published a report to update recommendations of the AAPM TG 40 report and add new recommendations concerning medical accelerators in ... -
Impact of collimator leaf width and treatment technique on stereotactic radiosurgery and radiotherapy plans for intra- and extracranial lesions.
(Radiation oncology (London, England), 2009-01-21)BACKGROUND: This study evaluated the dosimetric impact of various treatment techniques as well as collimator leaf width (2.5 vs 5 mm) for three groups of tumors -- spine tumors, brain tumors abutting the brainstem, and liver ... -
Knowledge-based IMRT treatment planning for prostate cancer.
(2011)The goal of intensity-modulated radiation therapy (IMRT) treatment plan optimization is to produce a cumulative dose distribution that satisfies both the dose prescription and the normal tissue dose constraints. The typical ... -
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 ... -
Quantitative comparison of automatic and manual IMRT optimization for prostate cancer: the benefits of DVH prediction.
(Journal of applied clinical medical physics, 2015-03-08)A recent publication indicated that the patient anatomical feature (PAF) model was capable of predicting optimal objectives based on past experience. In this study, the benefits of IMRT optimization using PAF-predicted objectives ... -
Task Group 174 Report: Utilization of [18 F]Fluorodeoxyglucose Positron Emission Tomography ([18 F]FDG-PET) in Radiation Therapy.
(Medical physics, 2019-10)The use of positron emission tomography (PET) in radiation therapy (RT) is rapidly increasing in the areas of staging, segmentation, treatment planning, and response assessment. The most common radiotracer is 18 ... -
The application of distance transformation on parameter optimization of inverse planning in intensity-modulated radiation therapy.
(Journal of applied clinical medical physics, 2008-04-16)In inverse planning for intensity-modulated radiation therapy (IMRT), the dose specification and related weighting factor of an objective function for involved organs is usually predefined by a single value and then iteratively ... -
The investigation on the location effect of external markers in respiratory-gated radiotherapy.
(Journal of applied clinical medical physics, 2008-04-16)PURPOSE:To investigate the effect of the marker placement on the correlation relationship between the motions of external markers and the internal target under different breathing patterns for several lung cancer patients. ... -
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 ...
