Independent verification of complex treatment delivery with megavolt photon beam radiotherapy (RT) has been effectively used to detect and prevent errors. This work presents the validation and uncertainty analysis of a model that predicts 2D portal dose images (PDIs) without a patient or phantom in the beam. The prediction model is based on an exponential point dose model with separable primary and secondary photon fluence components. The model includes a scatter kernel, off-axis ratio map, transmission values and penumbra kernels for beam-delimiting components. These parameters were derived through a model fitting procedure supplied with point dose and dose profile measurements of radiation fields. The model was validated against a treatment planning system (TPS; Eclipse) and radiochromic film measurements for complex clinical scenarios, including volumetric modulated arc therapy (VMAT). Confidence limits on fitted model parameters were calculated based on simulated meas...
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A study using a new computer-aided detection (CAD) algorithm found breast cancers... Read more on AuntMinnieEurope.com Related Reading: ...
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Ahead of print: Prävalenz und Risikofaktoren der felinen Hyperthyreose in einer Klinikpopulation ...Ziel: Die feline Hyperthyreose ist eine häufige Endokrinopathie bei älteren Katzen. In früheren Studien wurden unausgewogene Ernährung, Schi...
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Dicyclohexyl phthalate (DCHP) is one of the phthalate plasticizers. The objective of the present study was to investigate the effects of DCH...
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Health Promotion in the Community: Impact of Faith-Based Lay Health Educators in Urban NeighborhoodsAbstract Promoting wellness and providing reliable health information in the community present serious challenges. Lay health educators, al...
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Abstract To characterize the anatomical connectivity of the prelemniscal radiations (Raprl), a white matter region within the posterior sub...
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Predictors of postoperative pneumonia in patients undergoing oral cancer resections and its management p. 69 Ridhi Sood, Jerry Paul, Sunil...
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This work presents the nonlinear dynamical analysis of a multilayer piezoelectric macrofiber composite (MFC) laminated shell. The effects of...
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The upper reaches of the Heihe River have been regarded as a hotspot for phytoecology, climate change, water resources and hydrology studies...
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