Results 131 to 140 of about 2,679,915 (389)

DEVELOPMENT OF THE RADIOCARBON CALIBRATION PROGRAM

, 2001
This paper highlights some of the main developments to the radiocarbon calibration program, OxCal. In addition to many cosmetic changes, the latest version of OxCal uses some different algorithms for the treatment of multiple phases.
C. Ramsey
semanticscholar   +1 more source

Evaluation of the system accuracy of frameless stereotactic radiosurgery using a combination of cone beam CT, six degrees of freedom couch, and surface image‐guided systems

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study aims to evaluate the accuracy of the frameless linear accelerator‐based stereotactic radiosurgery (FSRS) system incorporating cone‐beam CT (CBCT), six degrees of freedom (6‐DoF) couch, room laser, and surface image‐guided (SG) systems.
Hao‐Wen Cheng, Jonathan Li, Sheng‐Hsuan Sun, Guanghua Yan, Chihray Liu   +4 more
wiley   +1 more source

Online SLAM with Any-time Self-calibration and Automatic Change Detection [PDF]

arXiv, 2014
A framework for online simultaneous localization, mapping and self-calibration is presented which can detect and handle significant change in the calibration parameters. Estimates are computed in constant-time by factoring the problem and focusing on segments of the trajectory that are most informative for the purposes of calibration. A novel technique
arxiv  

Fast, automated optimization of virtual monoenergetic images with the dual‐energy image synthesizer for cone‐beam CT

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background Dual‐energy cone‐beam CT (DE‐CBCT) has become subject of recent interest due to the ability to produce virtual monoenergetic images (VMIs) with improved soft‐tissue contrast and reduced nonuniformity artifacts. However, efficient production and optimization of VMIs remains an under‐explored part of DE‐CBCT's application.
Andrew Keeler, Jason Luce, Mathias Lehmann, John C. Roeske, Hyejoo Kang   +4 more
wiley   +1 more source

Surface dose analysis and dosimetric comparison of Halcyon versus Truebeam in breast cancer radiotherapy: An OSL dosimetry study

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Breast cancer is a neoplastic disease with high prevalence among women. Radiotherapy is one of the principal treatment modalities for this disease, but it poses significant challenges. This study aimed to compare and evaluate the technical and dosimetric performance of conventional C‐arm linac systems and a new design, Halcyon, in the ...
Mustafa Çağlar, Kudret Akçay, Esra Serin, Dursun Eşitmez, Mehmet Sıddık Cebe, Navid Kheradmand, Ömer Yazıcı, Dilek Ünal, Evrim Metcalfe   +8 more
wiley   +1 more source

Development of a method for measuring low energy electron beam irradiation parameters by calorimetry and step stacking

Fushe yanjiu yu fushe gongyi xuebao
Electron beam irradiation processing has become an important component of the nuclear technology industry, with low-energy electron beam increasingly being applied in processes such as coating curing, wastewater treatment, and food preservation. Accurate
LUO Rui, ZHANG Yuhe, MAO Naqing
doaj   +1 more source

Consistent Calibration of VIRR Reflective Solar Channels Onboard FY-3A, FY-3B, and FY-3C Using a Multisite Calibration Method

Remote Sensing, 2018
The FengYun-3 (FY-3) Visible Infrared Radiometer (VIRR), along with its predecessor, the Multispectral Visible Infrared Scanning Radiometer (MVISR), onboard the FY-1C and FY-1D, has collected continuous daily global observations for 18 years.
Ling Wang, Xiuqing Hu, Lin Chen, Lingli He   +3 more
doaj   +1 more source

Photometric Calibration of the Swift Ultraviolet/Optical Telescope

, 2007
We present the photometric calibration of the Swift UltraViolet/Optical Telescope (UVOT) which includes: optimum photometric and background apertures, effective area curves, colour transformations, conversion factors for count rates to flux, and the ...
A. A. Breeveld, A. Cucchiara, A. J. Blustin, A. Morgan, Ažusienis, B. Hancock, Barthelmy, Bessel, Bianchi, Blackburn, Bohlin, Bohlin, Breeveld, Burrows, Burrows, Buser, C. Gronwall, Colina, D. Vanden Berk, F. Marshall, Fordham, Fordham, Gehrels, H. Huckle, Hicken, Holberg, Ivanushkina, Ivezic, K. O. Mason, Kawakami, Kawakami, Landolt, Li, M. Carter, M. De Pasquale, M. Ivanushkina, M. J. Page, M. M. Chester, M. Still, Mason, Massa, Massey, Menzies, Michel, Milliard, N. P. M. Kuin, P. Boyd, P. Broos, P. J. Brown, P. J. Smith, P. Roming, P. Schady, Pei, Pickles, Pogson, Poole, Poole, Poole, Roming, Roming, Roming, S. B. Pandey, S. Hunsberger, S. Immler, S. Koch, S. T. Holland, Siegmund, Stetson, Stetson, T. Kennedy, T. S. Poole, W. Landsman   +71 more
core   +1 more source

Design and validation of a novel dosimetry phantom for motion management audits

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background We present a novel phantom design for conducting end‐to‐end dosimetry audits for respiratory motion management of two anatomical treatment sites. The design enables radiochromic film measurements of the dose administered to the target throughout the respiratory cycle (motion‐included) and the dose delivered to the time‐averaged ...
Alex Burton, Sabeena Beveridge, Nicholas Hardcastle, Silvio Malfitana, Janaka Madamperuma, Rick Franich   +5 more
wiley   +1 more source

Novel CT radiomics models for the postoperative prediction of early recurrence of resectable pancreatic adenocarcinoma: A single‐center retrospective study in China

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose To assess the predictive capability of CT radiomics features for early recurrence (ER) of pancreatic ductal adenocarcinoma (PDAC). Methods Postoperative PDAC patients were retrospectively selected, all of whom had undergone preoperative CT imaging and surgery. Both patients with resectable or borderline‐resectable pancreatic cancer met
Xinze Du, Yongsu Ma, Kexin Wang, Xiejian Zhong, Jianxin Wang, Xiaodong Tian, Xiaoying Wang, Yinmo Yang   +7 more
wiley   +1 more source