The goal of this study is to develop a generalized source model for accurate Monte Carlo dose simulations of CT scans based solely on the measurement data without a priori knowledge of scanner specifications. The proposed generalized source model consists of an extended circular source located at x-ray target level with its energy spectrum, source distribution and fluence distribution derived from a set of measurement data conveniently available in the clinic. Specifically, the central axis percent depth dose (PDD) curves measured in water and the cone output factors measured in air were used to derive the energy spectrum and the source distribution respectively with a Levenberg–Marquardt algorithm. The in-air film measurement of fan-beam dose profiles at fixed gantry was back-projected to generate the fluence distribution of the source model. A benchmarked Monte Carlo user code was used to simulate the dose distributions in water with the developed source model as beam i...
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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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