Results 121 to 130 of about 681,778 (171)

Contrast enhancement for backpropagation

IEEE Transactions on Neural Networks, 1996
This paper analyzes the effect of data-contrast to a backpropagation (BP) network and introduces a data preprocessing algorithm that can improve the efficiency of the standard BP learning. The basic idea is to transform input data to a range that associates the high-slope region of the sigmoid function where a relatively large modification of weights ...
Taek Mu Kwon, Hui Cheng
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Contrast-Enhanced Ultrasonography

2012
Ultrasound is the cornerstone for prostatic imaging and covers diagnostics, therapy monitoring, and follow-up. In the aspect of focal therapy, accurate prostate cancer localization is mandatory. Contrast-enhanced ultrasound (CEUS) is a promising imaging technique which has shown to greatly increase the chances to find prostate cancer in biopsies.
Smeenge, M., Mischi, M., Laguna, M.P., Rosette, de la, J.J.M.C.H., Wijkstra, H.   +4 more
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Contrast Enhancement for Hypoechoic Lesions

2006 International Conference of the IEEE Engineering in Medicine and Biology Society, 2006
We propose a novel method for contrast enhancement in hypoechoic lesions. Our approach is based on the concept of distance on image manifolds to obtain a credibility function which captures the delineation of the lesion; if the lesion is sharply defined, the credibility function will also give a sharp response, whereas it varies smoothly at locations ...
Vincent Laurain, Dieter Hönigmann
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Toboggan contrast enhancement for contrast segmentation

[1990] Proceedings. 10th International Conference on Pattern Recognition, 2002
Toboggan contrast enhancement is a noniterative single-parameter linear execution time method for selectively augmenting the contrast of multispectral images of arbitrary dimensionality. Toboggan enhancement followed by contrast segmentation is compared with adaptive smoothing, all iterative, multiple parameter, parallel approach that achieves similar ...
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Reversible Contrast Enhancement

2016
This paper proposes a novel idea of reversible contrast enhancement (RCE) for digital images. Different from the traditional methods, we aim to embed the reversible feature into image contrast enhancement, making sure that the processed image can be losslessly turned back to the original.
Zhenxing Qian, Xinpeng Zhang 0001, Weiming Zhang 0001, Yimin Wang   +3 more
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Contrast adaptation may enhance contrast discrimination

Spatial Vision, 2002
Whether contrast adaptation may enhance contrast discrimination is a question that has remained largely unresolved because of conflicting empirical evidence. Greenlee and Heitger (1988), for example, reported that contrast discrimination may be enhanced after contrast adaptation, while Maattanen and Koenderink (1991) did not.
Giulia, Abbonizio, Keith, Langley, Colin W G, Clifford   +2 more
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Clinical evaluation of contrast-enhanced digital mammography and contrast enhanced tomosynthesis—Comparison to contrast-enhanced breast MRI

European Journal of Radiology, 2015
To compare the diagnostic accuracy of contrast-enhanced digital mammography (CEDM) and contrast-enhanced tomosynthesis (CET) to dynamic contrast enhanced breast MRI (DCE-MRI) using a multireader-multicase study.Institutional review board approval and informed consents were obtained.
Chen-Pin, Chou, John M, Lewin, Chia-Ling, Chiang, Bao-Hui, Hung, Tsung-Lung, Yang, Jer-Shyung, Huang, Jia-Bin, Liao, Huay-Ben, Pan   +7 more
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Contrast-Enhanced Ultrasound of the Kidneys

2009
Several imaging techniques can be used for visualization of the kidneys dependent on the indication. Ultrasound (US), computerized tomography (CT), and magnetic resonance imaging (MRI) are most commonly used. US is a safe, relatively inexpensive, noninvasive, and widely available imaging method.
Beemster, Patricia, Laguna Pes, M. Pilar, Wijkstra, Hessel   +2 more
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Fuzzy approach to contrast enhancement

Proceedings. Fourteenth International Conference on Pattern Recognition (Cat. No.98EX170), 2002
Commonly used techniques for contrast enhancement fall into two categories: (1) indirect methods and (2) direct methods. In this paper, we propose a novel, fuzzy, adaptive, direct contrast enhancement method based on the fuzzy entropy principle and fuzzy set theory.
Heng-Da Cheng, Hui juan Xu
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Contrast‐enhanced MR angiography

Journal of Magnetic Resonance Imaging, 1993
AbstractMagnetic resonance (MR) angiography, although still in its infancy, is recognized as a valuable diagnostic tool. Investigation of the utility of contrast media as applied to MR angiography is, to no surprise, preliminary. In restricted instances, with present techniques, contrast media‐enhanced MR angiography can provide additional valuable ...
V M, Runge, J E, Kirsch, C, Lee
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