Results 31 to 40 of about 30,785,842 (283)

Performance of virtual non-contrast images generated on clinical photon-counting detector CT for emphysema quantification: proof of concept

British Journal of Radiology, 2022
Objective: To evaluate the performance of virtual non-contrast images (VNC) compared to true non-contrast (TNC) images in photon-counting detector computed tomography (PCD-CT) for the evaluation of lung parenchyma and emphysema quantification.
Lisa Jungblut, T. Sartoretti, Daniel Kronenberg, V. Mergen, A. Euler, B. Schmidt, H. Alkadhi, T. Frauenfelder, K. Martini   +8 more
semanticscholar   +1 more source

Non-contrast MRI can accurately characterize adnexal masses: a retrospective study

European Radiology, 2021
To determine the accuracy of interpretation of a non-contrast MRI protocol in characterizing adnexal masses. Two hundred ninety-one patients (350 adnexal masses) who underwent gynecological MRI at our institution between the 1st of January 2008 and the ...
Hilal Şahin, C. Panico, S. Ursprung, V. Simeon, P. Chiodini, A. Frary, Bruno D Carmo, Janette Smith, S. Freeman, M. Jimenez-Linan, H. Bolton, K. Haldar, J. Ang, C. Reinhold, E. Sala, H. Addley   +15 more
semanticscholar   +1 more source

Radiation Dose In Non Conventional Contrast Radiography Examination

Jurnal Riset Kesehatan, 2015
This study aims to determine the radiation dose to the acceptance of conventional non- contrast radiographs and the dose received by the patient on a non contrast radiographs compared Perka BAPETEN According Reference No 8 of 2011.Quantitative research ...
Darmini Darmini, J. Dahjono J. Dahjono, Asri Indah Aryani   +2 more
doaj   +1 more source

Association of Maximal Extent of Resection of Contrast-Enhanced and Non-Contrast-Enhanced Tumor With Survival Within Molecular Subgroups of Patients With Newly Diagnosed Glioblastoma.

JAMA Oncology, 2020
Importance Per the World Health Organization 2016 integrative classification, newly diagnosed glioblastomas are separated into isocitrate dehydrogenase gene 1 or 2 (IDH)-wild-type and IDH-mutant subtypes, with median patient survival of 1.2 and 3.6 years,
A. Molinaro, S. Hervey-Jumper, R. Morshed, Jacob S. Young, Seung-Gu J. Han, P. Chunduru, Yalan Zhang, J. Phillips, A. Shai, Marisa Lafontaine, J. Crane, Ankush Chandra, P. Flanigan, Arman Jahangiri, G. Cioffi, Q. Ostrom, John E. Anderson, C. Badve, J. Barnholtz-Sloan, A. Sloan, B. Erickson, P. Decker, M. Kosel, D. Lachance, J. Eckel-Passow, R. Jenkins, J. Villanueva-Meyer, T. Rice, M. Wrensch, J. Wiencke, N. A. Oberheim Bush, Jennie W. Taylor, N. Butowski, M. Prados, Jennifer L. Clarke, Susan M. Chang, E. Chang, M. Aghi, P. Theodosopoulos, Michael M. McDermott, M. Berger   +40 more
semanticscholar   +1 more source

Convolutional neural network for automated segmentation of the liver and its vessels on non-contrast T1 vibe Dixon acquisitions

Scientific Reports, 2022
We evaluated the effectiveness of automated segmentation of the liver and its vessels with a convolutional neural network on non-contrast T1 vibe Dixon acquisitions.
L. Zbinden, D. Catucci, Yannick Suter, A. Berzigotti, L. Ebner, A. Christe, V. Obmann, Raphael Sznitman, A. Huber   +8 more
semanticscholar   +1 more source

Binocular interaction: contrast matching and contrast discrimination are predicted by the same model [PDF]

, 2007
How do signals from the 2 eyes combine and interact? Our recent work has challenged earlier schemes in which monocular contrast signals are subject to square-law transduction followed by summation across eyes and binocular gain control.
Tim S. Meese, Georgeson, Mark A., Georgeson, Mark A, Mark A. Georgeson, Baker, D.H., Meese, T.S., Baker, Daniel H, Georgeson, M.A., Meese, Timothy S., Baker, Daniel H., Meese, Tim S, Daniel H. Baker   +11 more
core   +1 more source

Advanced Warning of Aortic Dissection on Non-Contrast CT: The Combination of Deep Learning and Morphological Characteristics

Frontiers in Cardiovascular Medicine, 2022
Background: The identification of aortic dissection (AD) at baseline plays a crucial role in clinical practice. Non-contrast CT scans are widely available, convenient, and easy to perform.
Y. Yi, L. Mao, Cheng Wang, Yu-Bo Guo, Xiao Luo, Dong-yu Jia, Y. Lei, Judong Pan, Jiayue Li, Shu-Fang Li, Xiu-Li Li, Zhengyu Jin, Yi-Ning Wang   +12 more
semanticscholar   +1 more source

Binocular contrast vision at and above threshold [PDF]

, 2006
A fundamental problem for any visual system with binocular overlap is the combination of information from the two eyes. Electrophysiology shows that binocular integration of luminance contrast occurs early in visual cortex, but a specific systems ...
Georgeson, Mark A., Meese, Tim S., Meese, Timothy S., D. H. Baker, T. S. Meese, M. A. Georgeson, Baker, Daniel H.   +6 more
core   +1 more source

Calcium scoring using virtual non-contrast images from a dual-layer spectral detector CT: comparison to true non-contrast data and evaluation of proportionality factor in a large patient collective

European Radiology, 2021
Determination of coronary artery calcium scoring (CACS) in non-contrast computed tomography (CT) images has been shown to be an important prognostic factor in coronary artery disease (CAD). The objective of this study was to evaluate the accuracy of CACS
F. Gassert, C. E. Schacky, C. Müller-Leisse, F. T. Gassert, G. Pahn, K. Laugwitz, M. Makowski, Jonathan Nadjiri   +7 more
semanticscholar   +1 more source

The functional role of contrast adaptation [PDF]

, 1988
Prolonged inspection of high contrast sinewave gratings increases the contrast required to detect gratings having a similar spatial frequency and orientation. The functional role of such adaptation has, however, in the past, eluded disclosure.
Heitger, F., Greenlee, Mark W.
core   +1 more source