Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Jens Wiegert"'
Autor:
Andrew J. Einstein, Bin Cheng, Jens Wiegert, Elazar‐Lars Gerland, Carla M. Thompson, Thomas Morton, Sandra S. Halliburton, Peter Prinsen, Sigal Trattner, Efrat Shefer
Publikováno v:
Medical physicsReferences. 46(11)
PURPOSE Accurate, patient-specific radiation dosimetry for CT scanning is critical to optimize radiation doses and balance dose against image quality. While Monte Carlo (MC) simulation is often used to estimate doses from CT, comparison of estimates
Autor:
Sachin Jambawalikar, Carla M. Thompson, Peter Prinsen, Jens Wiegert, Rani Al-Senan, Yoad Yagil, Andrew J. Einstein, Sandra S. Halliburton, Bin Cheng, Sigal Trattner, Elazar Lars Gerland, Maxwell Amurao, Thomas Morton, Efrat Shefer
Publikováno v:
Medical Physics. 44:6589-6602
PURPOSE Metal-oxide-semiconductor field-effect transistors (MOSFETs) serve as a helpful tool for organ radiation dosimetry and their use has grown in computed tomography (CT). While different approaches have been used for MOSFET calibration, those us
Recently, spectral CT has been drawing a lot of attention in a variety of clinical applications primarily due to its capability of providing quantitative information about material properties. The quantitative integrity of the reconstructed data depe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f556eb4a5d87cc5c8b62bb54ef087eb
Autor:
Nancy A. Obuchowski, Jennifer A. Bullen, Jens Wiegert, Sandra S. Halliburton, Carla M. Thompson, Kavitha Yaddanapudi, Jeffrey H. Yanof
Publikováno v:
Journal of cardiovascular computed tomography. 10(3)
Background Estimates of effective dose (E) for cardiovascular CT are obtained from a scanner-provided dose metric, the dose-length product (DLP), and a conversion factor. These estimates may not adequately represent the risk of a specific scan to obe
Publikováno v:
Academic Radiology. 12:1010-1023
Rationale and Objectives For 3D X-ray imaging during interventions, changes of the imaged object are often restricted to a small part of the field of view, suggesting region of interest (ROI) imaging by irradiating this area only. In this article, we
Autor:
Jens Wiegert, Georg Rose, Jürgen Weese, Hermann Schomberg, Thomas Netsch, Jörg Wulff, Matthias Bertram, Dirk Schäfer
Publikováno v:
CARS
C-arm X-ray systems can be used to acquire rotational cone-beam projections during interventions, from which CT-like 3D images can be reconstructed. For intraprocedural 3D imaging, changes of the imaged object are often restricted to a certain part o
Publikováno v:
CARS
The image quality in volume CT (VCT) imaging is significantly degraded if patient motion such as rigid-body or respiratory motion occurs during data acquisition. Especially for VCT on interventional C-arm systems, the rather long acquisition times in
Autor:
Jens Wiegert, Jörg Habetha
Publikováno v:
Journal of Parallel and Distributed Computing. 63:166-181
In this paper the network capacity of a cluster-based, wireless multihop ad hoc network is derived. Such a network consists of clusters, in which one station, called the Cluster Head or Central Controller (CC) organizes the access to the radio interf
Publikováno v:
Medical Imaging: Image Processing
Administered dose of ionizing radiation during medical imaging is an issue of increasing concern for the patient, for the clinical community, and for respective regulatory bodies. CT radiation dose is currently estimated based on a set of very simpli
Publikováno v:
Physics in medicine and biology. 55(24)
The most obvious problem in obtaining spectral information with energy-resolving photon counting detectors in clinical computed tomography (CT) is the huge x-ray flux present in conventional CT systems. At high tube voltages (e.g. 140 kVp), despite t