Results 291 to 300 of about 1,054,818 (327)

Contrast-to-noise ratio of multiple slice spin lock technique: prospects for liver imaging

The British Journal of Radiology, 2003
Spin lock (SL) MRI technique has been demonstrated to provide similar lesion/liver contrast to conventional MR technique. Multiple slice SL technique allows a large number of slices to be collected within a given repetition time due to the short echo time. In addition, the short echo time reduces movement and susceptibility artefacts.
J, Halavaara, S, Lukkarinen, R, Sepponen, A, Markkola, J, Tanttu   +4 more
openaire   +2 more sources

Contrast-to-Noise Ratios of Different Elements in Digital Mammography

Investigative Radiology, 2007
To determine the contrast-to-noise ratios (CNRs) of different elements at different energies using various anode/filter combinations currently employed in digital mammography. The elements investigated included not only elements already used in conventional contrast agents such as gadolinium and iodine but also other elements to investigate their ...
Felix, Diekmann, Alexander, Sommer, Ruediger, Lawaczeck, Susanne, Diekmann, Hubertus, Pietsch, Ulrich, Speck, Bernd, Hamm, Ulrich, Bick   +7 more
openaire   +2 more sources

Evaluation of both image resolution and contrast-to-noise ratio in scanning electron microscopy

Journal of Electron Microscopy, 2007
The contrast-to-gradient (CG) resolution has been defined as a weighted harmonic mean of the local resolution, i.e. the length defining the object's local fine structure at each pixel position. The newly defined resolution Res is defined as 2 sigma/ sqrt 2, where 2 sigma is a sharpness factor of the image pattern obtained by the conversion 2 sigma ...
Tohru, Ishitani, Mitsugu, Sato
openaire   +2 more sources

A novel method for contrast-to-noise ratio (CNR) evaluation of digital mammography detectors

European Radiology, 2009
The purpose of this study was to test a new, simple method of evaluating the contrast-to-noise ratio (CNR) over the entire image field of a digital detector and to compare different mammography systems. Images were taken under clinical exposure conditions for a range of simulated breast thicknesses using poly(methyl methacrylate) (PMMA).
P, Baldelli, N, Phelan, G, Egan
openaire   +2 more sources

Imaging Basics: Contrast-to-Noise Ratio

2022
Val M. Runge, Johannes T. Heverhagen
openaire   +1 more source

Optimal weighting strategies for maximizing contrast‐to‐noise ratio in photon counting CT images

Medical Physics
AbstractBackgroundPhoton counting detectors (PCDs) with energy discrimination capabilities have the potential to generate grayscale CT images with improved contrast‐to‐noise ratio (CNR) through optimal weighting of their spectral measurements.PurposeThis study evaluates the CNR performance of grayscale CT projections and images generated from spectral ...
Yirong, Yang, Sen, Wang, Grant M, Stevens, Jiahua, Fan, Adam S, Wang   +4 more
openaire   +2 more sources

Signal-to-Noise Ratio Versus Contrast-to-Noise Ratio

2022
Val M. Runge, Johannes T. Heverhagen
openaire   +1 more source

Predicting Generalized Contrast-to-Noise Ratios in Frame-Averaged Photoacoustic Images

2022 IEEE International Ultrasonics Symposium (IUS), 2022
Mardava R. Gubbi, Muyinatu A. Lediju Bell   +1 more
openaire   +1 more source

Cancer statistics for the US Hispanic/Latino population, 2021

Ca-A Cancer Journal for Clinicians, 2021
Kimberly D Miller, Paulo S Pinheiro, Priti Bandi   +2 more
exaly  

Cancer risk among World Trade Center rescue and recovery workers: A review

Ca-A Cancer Journal for Clinicians, 2022
Paolo Boffetta, Charles B Hall, Andrew C Todd   +2 more
exaly