Results 141 to 150 of about 301,214 (427)

Impact of Right Atrial Pressure on Fractional Flow Reserve Measurements

JACC: Cardiovascular Interventions, 2016
This study sought to assess the impact of a wide range of mean right atrial pressure (Pra) on fractional flow reserve (FFR) measurements.FFR invasively assesses the ischemic potential of coronary stenoses. FFR is calculated as the ratio of mean distal coronary pressure (Pd) to mean aortic pressure (Pa) during maximal hyperemia. The Pra is considered to
Toth, Gabor G, De Bruyne, Bernard, Rusinaru, Dan, DI GIOIA, GIUSEPPE, Bartunek, Jozef, PELLICANO, MARIANO, Vanderheyden, Marc, Adjedj, Julien, Wijns, William, Pijls, Nico H. J, BARBATO, EMANUELE   +10 more
openaire   +5 more sources

Closing the gap in plan quality: Leveraging deep‐learning dose prediction for adaptive radiotherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Balancing quality and efficiency has been a challenge for online adaptive therapy. Most systems start the online re‐optimization with the original planning goals. While some systems allow planners to modify the planning goals, achieving a high‐quality plan within time constraints remains a common barrier.
Sean J. Domal, Austen Maniscalco, Justin Visak, Michael Dohopolski, Dominic Moon, Vladimir Avkshtol, Dan Nguyen, Steve Jiang, David Sher, Mu‐ Han Lin   +9 more
wiley   +1 more source

Stereotactic radiosurgery for multiple small brain metastases using gamma knife versus single‐isocenter VMAT: Normal brain dose based on lesion number and size

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose The study evaluates rapid linear accelerator (Linac) single isocenter stereotactic radiosurgery (SRS) with Hyperarc for large target numbers. We compared to Gamma Knife (GK), which suffers from long treatment times and investigated causes of differences. Methods Linac SRS and GK treatment plans for patients receiving 18 Gy to the gross
Abram Abdou, Timoteo Almeida, Elizabeth Bossart, Irene Monterroso, Eric A. Mellon   +4 more
wiley   +1 more source

Threadneedle: An Experimental Tool for the Simulation and Analysis of Fractional Reserve Banking Systems [PDF]

arXiv, 2015
Threadneedle is a multi-agent simulation framework, based on a full double entry book keeping implementation of the banking system's fundamental transactions. It is designed to serve as an experimental test bed for economic simulations that can explore the banking system's influence on the macro-economy under varying assumptions for its regulatory ...
arxiv  

A Python package for fast GPU‐based proton pencil beam dose calculation

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Open‐source GPU‐based Monte Carlo (MC) proton dose calculation algorithms provide high speed and unparalleled accuracy but can be complex to integrate with new applications and remain slower than GPU‐based pencil beam (PB) methods, which sacrifice some physical accuracy for sub‐second plan calculation.
Mahasweta Bhattacharya, Calin Reamy, Heng Li, Junghoon Lee, William T. Hrinivich   +4 more
wiley   +1 more source

Coronary flow reserve and microcirculatory resistance in patients with coronary tortuosity and without atherosclerosis

Journal of International Medical Research, 2020
Objective Coronary tortuosity may affect epicardial coronary arterial blood flow. This study aimed to investigate the effect of coronary tortuosity on coronary flow reserve and the coronary microcirculation in patients without apparent coronary ...
Yang Li, Xiaoguo Zhang, Qiming Dai, Genshan Ma   +3 more
doaj   +1 more source

Dynamic Reserves in Matching Markets [PDF]

arXiv, 2020
We study a school choice problem under affirmative action policies where authorities reserve a certain fraction of the slots at each school for specific student groups, and where students have preferences not only over the schools they are matched to but also the type of slots they receive.
arxiv  

An investigation into the feasibility and efficacy of stereotactic radiosurgery for 1–3 cm single brain lesions on the ring‐mounted Halcyon LINAC

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose An evaluation of the accuracy, safety, and efficiency of the Halcyon ring delivery system (RDS) for stereotactic radiosurgery (SRS) treatment to relatively small (1–3 cm) brain lesions. Methods After completing the extensive in‐house quality assurance checks including Winston–Lutz test and independent dose verification via MD Anderson ...
Kate Hazelwood, Shane McCarthy, Josh Misa, David Castelvetere, William St. Clair, Damodar Pokhrel   +5 more
wiley   +1 more source

Intravascular Imaging Findings After PCI in Patients With Focal and Diffuse Coronary Artery Disease

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Following percutaneous coronary intervention (PCI), optical coherence tomography provides prognosis information. The pullback pressure gradient is a novel index that discriminates focal from diffuse coronary artery disease based on fractional ...
Hirofumi Ohashi, Takuya Mizukami, Jeroen Sonck, Frederic Bouisset, Brian Ko, Bjarne L. Nørgaard, Michael Mæng, Jesper Møller Jensen, Koshiro Sakai, Hirohiko Ando, Tetsuya Amano, Nicolas Amabile, Ziad Ali, Bernard De Bruyne, Bon‐Kwon Koo, Hiromasa Otake, Carlos Collet   +16 more
doaj   +1 more source

A Distributed Method for Optimal Capacity Reservation [PDF]

arXiv, 2017
We consider the problem of reserving link capacity in a network in such a way that any of a given set of flow scenarios can be supported. In the optimal capacity reservation problem, we choose the reserved link capacities to minimize the reservation cost.
arxiv