BACKGROUND AND PURPOSE High dose rate (HDR) brachytherapy is a clinically used procedure in prostate cancer treatment. The purpose of this study was to present the influence of using different optimization algorithms in 3D-CBRT planning on the treatment plan quality. MATERIALS AND METHODS Treatment plans were calculated for 15 patients--three plans for each patient using: geometrical optimiza...

There is an increasing awareness on the major benefits of using soil-geosynthetic composite (SGC) to achieve and maintain stability earth-filled embankment. Unlike mechanically stabilized earth wall, mechanism mass still not fully understood. For examples, current analyses have been limited SGC with a reinforcement spacing Sv 0.2 m only; combined effect backfill properties rarely studied; equat...

The intrinsic limitations of coronary arteriography to predict the physiological effects of coronary obstructions are well known. Therefore, more direct assessments of the functional significance of coronary stenoses are becoming increasingly important. Study of contrast passage by electrocardiogram-triggered digital radiography has been proposed as a way of assessing changes in myocardial perf...

C loud radiative forcing, the difference between the top-of-atmosphere radiative fluxes for all sky and clear skies, is a straightforward metric to gauge the climate impacts of contrails and contrail cirrus, which constitute a potentially serious long-term environmental issue associated with aviation (Minnis et al. 2004; Wuebbles et al. 2010). The Intergovernmental Panel on Climate Change (IPCC...

The upper displacement limit for motion was compared with the upper disparity limit for stereopsis using two-frame random dot kinematograms or briefly presented stereograms. dmax (the disparity/displacement at which subjects make 20% errors in a forced-choice paradigm) was found to be very similar for motion and stereo at all dot densities, and to fall with increasing dot density (0.006% or two...

The objective of this work is to evaluate dosimetric impact of multilumen balloon applicator rotation in high-dose-rate (HDR) brachytherapy for breast cancer. Highly asymmetrical dose distribution was generated for patients A and B, depending upon applicator proximity to skin and rib. Both skin and rib spacing was ≤ 0.7 cm for A; only rib spacing was ≤ 0.7 cm for B. Thirty-five rotation scenari...

Small fields smaller than 4 × 4 cm2 are used in stereotactic and conformal treatments where heterogeneity is normally present. Since dose calculation accuracy in both small fields and heterogeneity often involves more discrepancy, algorithms used by treatment planning systems (TPS) should be evaluated for achieving better treatment results. This report aims at evaluating accuracy of four model-...

Compact Reusable Garbled Circuits Dhinakaran Vinayagamurthy Master of Science Graduate Department of Computer Science University of Toronto 2014 Garbled circuits are integral to secure function evaluation. A garbled circuit Ĉ for a circuit C enables a user to compute C(x) and nothing more about C or x, when given an encoding x̂ for the input x. Earlier, garbling schemes produced only single-use ...

OBJECTIVE To investigate whether the respiratory variation of the inferior vena cava diameter (∆DIVC) and right internal jugular vein diameter (∆DRIJ) are correlated in mechanically ventilated patients. METHODS This study was a prospective clinical analysis in an intensive care unit at a university hospital. Thirty-nine mechanically ventilated patients with hemodynamic instability were includ...

Let T be an edge weighted tree and let dmin, dmax be two nonnegative real numbers. Then the pairwise compatibility graph (PCG) of T is a graph G such that each vertex of G corresponds to a distinct leaf of T and two vertices are adjacent inG if and only if the weighted distance between their corresponding leaves in T is in the interval [dmin, dmax]. Similarly, a given graph G is a PCG if there ...