Tianli Han

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PURPOSE To validate a Monte Carlo model and evaluate the dosimetric capabilities of a novel commercial CT/MR compatible Fletcher applicator for cervical cancer brachytherapy. METHODS MCNPX 2.7.0 was used to model the Fletcher CT/MR shielded applicator (FA) and 192Ir HDR source. Energy deposition was calculated with a track length estimator modified by an(More)
PURPOSE The dosimetric uncertainties in junction regions are one of the major concerns in treatments involving field-junctions, especially tangential breast and supraclavicular fossa radiotherapy fields. The uncertainties are linked to dose calculation algorithms, set-up, jaw/couch position uncertainties, and choice of mono-versus multiple-isocentric(More)
PURPOSE To quantify the difference in dose to PTV_EVAL and OARs (skin and rib) as calculated by (TG43) and heterogeneous calculations (CCC). METHODS 25 patient plans (5 Contura and 20 SAVI) were selected for analysis. Clinical dose distributions were computed with a commercially available treatment planning algorithm (TG43-D_(w,w)) and then recomputed(More)
PURPOSE Stereography can provide a visualization of the skin surface for radiation therapy patients. The aim of this study was to verify the registration algorithm in a commercial image analysis software, 3dMDVultus, for the fusion of stereograms and CT images. METHODS CT and stereographic scans were acquired of a head phantom and a deformable phantom. CT(More)
As the optimal surgery practice for coronary disease is still debated (percutaneous coronary intervention PCI vs coronary aortic by-pass graft CABG) computational tools may provide a quantitative assessment useful for evaluating the real impact of the different options. In particular, computational fluid dynamics has been used in the last years for(More)
PURPOSE Dose accuracy injunction regions of breast-tangential therapy is a challenge, and inaccurate dose predictions may lead to unreal hot/cold spots. Availability of the novel deterministic radiation transport method Acuros XB (AXB) provides a potential for more accurate dose predictions. This study assesses relative dose accuracies of this and the(More)
Gas environment detection has become more urgent and significant, for both industrial manufacturing and environment monitoring. Gas sensors based on a catalytically-sensing mechanism are one of the most important types of devices for gas detection, and have been of great interest during the past decades. However, even though many efforts have contributed to(More)
PURPOSE To evaluate the heterogeneity corrected dose calculations from the Acuros XB (AXB), a novel deterministic dose calculation algorithm based on grid-based Boltzmann transport equation solver (GBBS), for IMRT and VMAT plans. METHODS The Radiological Physics Center's lung phantom was used to create clinically equivalent IMRT and VMAT plans (RapidArc)(More)
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