Results 61 to 70 of about 66,716 (273)

Electronic Portal Imaging Device (EPID) Portal Image Filtering for Simplifying Registration on Radiation Therapy

Japanese Journal of Radiological Technology, 2012
A simple method for improving the quality of electronic portal imaging device (EPID) portal images was proposed for the reduction of the burden on the registration between digital reconstruction radiography (DRR) and EPID portal images in radiation therapy.
Masanori, Yamada, Masaki, Ohkubo, Akihiro, Kayugawa, Hiromi, Yamada, Masataka, Matsuura, Takashi, Miura, Toshihisa, Kusumoto   +6 more
openaire   +3 more sources

Oral Dosed Organo‐Silica Nanoparticles Restore Glucose Homeostasis and β‐Cell Function in Diabetes Rats

Advanced Functional Materials, EarlyView.
An oral nanoplatform, MOP@T@D, which can maintain glucose homeostasis and restore islet β cells in diabetic rats is developed. It achieves efficient intestinal absorption and liver‐targeted delivery. The nanoparticle disintegrates only in response to hyperglycemia to release insulin on demand and provides antioxidant protection through selenoprotein ...
Chenxiao Chu, Mingli Wei, Che Bian, Xiaoshuang Bi, Yaxin Deng, Peifu Xiao, Jiansong Zhao, Yuying Wang, Haibing He, Jingxin Gou, Tian Yin, Xing Tang, Li Yang, Hongbo Zhang, Yu Zhang   +14 more
wiley   +1 more source

An Empirical Transmitted EPID Dosimetry Method using a Back-Projection Algorithm [PDF]

Journal of Biomedical Physics and Engineering, 2019
Background: The present study aimed to introduce a rapid transmission dosimetry through an electronic portal-imaging device (EPID) to achieve two-dimensional (2D) dose distribution for homogenous environments. Material and Methods: In this Phantom study,
S M Hashemi, M H Bahreyni, M Mohammadi, S Nasseri, S Bayani, H Gholamhosseinian, R Salek, F Shahedi, M Momennezhad   +8 more
doaj   +1 more source

A recurrent neural network for rapid detection of delivery errors during real-time portal dosimetry

Physics and Imaging in Radiation Oncology, 2022
Background and purpose: Real-time portal dosimetry compares measured images with predicted images to detect delivery errors as the radiotherapy treatment proceeds.
James L. Bedford, Ian M. Hanson
doaj   +1 more source

Development and operation of a pixel segmented liquid-filled linear array for radiotherapy quality assurance

, 2004
A liquid isooctane (C$_{8}$H$_{18}$) filled ionization linear array for radiotherapy quality assurance has been designed, built and tested. The detector consists of 128 pixels, each of them with an area of 1.7 mm $\times$ 1.7 mm and a gap of 0.5 mm.
A Iglesias, A Pazos, Belletti S, Boag J W, Debye P, Eberle K, F Gómez, Fowler J F, J Mosquera, J Pardo, J Pena, J Sendón, Johansson B, L Franco, M Pombar, Martens C, Martens C, Pardo J, R Lobato, van Herk M, Wickman G   +20 more
core   +1 more source

IMRT QA using machine learning: A multi-institutional validation. [PDF]

, 2017
PurposeTo validate a machine learning approach to Virtual intensity-modulated radiation therapy (IMRT) quality assurance (QA) for accurately predicting gamma passing rates using different measurement approaches at different institutions.MethodsA Virtual ...
Chan, Maria F, Deasy, Joseph O, Lim, Seng Boh, Scheuermann, Ryan, Solberg, Timothy D, Valdes, Gilmer   +5 more
core   +2 more sources

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

Advanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo, Masoud Mansouri, Carlos Garcia‐Fernandez, Daniel Sánchez‐Portal, Aran Garcia‐Lekue, Gustavo Ceballos, Aitor Mugarza   +6 more
wiley   +1 more source

Dosimetric Verification of Intensity Modulated Radiotherapy with an Electronic Portal Imaging Device [PDF]

, 2005
Kanker is de ongecontroleerde proliferatie en verspreiding van cellen en kan zich manisfesteren in bijna het hele lichaam. Meeste kankers worden behandeld met chirurgie, bestraling (radiotherapie), en/of met medicijnen (chemotherapie).
Vieira, S.C. (Sandra)
core   +1 more source

Simulating the nanomechanical response of cyclooctatetraene molecules on a graphene device [PDF]

, 2018
We investigate the atomic and electronic structures of cyclooctatetraene (COT) molecules on graphene and analyze their dependence on external gate voltage using first-principles calculations.
Cohen, Marvin L., Crommie, Michael F., Oh, Sehoon   +2 more
core   +3 more sources

Ultrasound in Women's Health: Mechanisms, Applications, and Emerging Opportunities

Advanced Materials, EarlyView.
As healthcare moves toward decentralization, ultrasound technologies are evolving from strictly imaging tools in clinical settings into versatile diagnostic and therapeutic platforms, with growing roles addressing women's health needs. This review highlights how ultrasound's underlying physical mechanisms can be harnessed to reduce disparities in women'
Sarah B. Ornellas, Bilal Kizilaslan, Aastha Shah, Jason F. Hou, Yoonsoo Shin, Alejandra Hernandez Moyers, Claudia Lozano, Canan Dagdeviren   +7 more
wiley   +1 more source