Now showing items 8371-8380 of 8533
Incorporating biomarkers into the study of socio-economic status and health among older adults in China.
(SSM - population health, 2017-12)
The social gradient in health - that individuals with lower SES have worse health than those with higher SES- is welldocumented using self-reports of health in more developed countries. Less is known about the relationship ...
Trends in Place of Death for Individuals With Cardiovascular Disease in the United States
(Journal of the American College of Cardiology, 2019-10-15)
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 ...
Markerless Four-Dimensional-Cone Beam Computed Tomography Projection-Phase Sorting Using Prior Knowledge and Patient Motion Modeling: A Feasibility Study.
(Cancer translational medicine, 2017-01)
During cancer radiotherapy treatment, on-board four-dimensional-cone beam computed tomography (4D-CBCT) provides important patient 4D volumetric information for tumor target verification. Reconstruction of 4D-CBCT images ...
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 ...
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 ...
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 ...
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 ...
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