Results 1 to 10 of about 1,054,818 (327)

On the definition of signal-to-noise ratio and contrast-to-noise ratio for FMRI data. [PDF]

PLoS ONE, 2013
Signal-to-noise ratio, the ratio between signal and noise, is a quantity that has been well established for MRI data but is still subject of ongoing debate and confusion when it comes to fMRI data.
Marijke Welvaert, Yves Rosseel
doaj   +7 more sources

Performance of A Statistical-Based Automatic Contrast-to-Noise Ratio Measurement on Images of the ACR CT Phantom [PDF]

Journal of Imaging
This study evaluates the performance of a statistical-based automatic contrast-to-noise ratio (CNR) measurement method on images of the ACR CT phantom under varying imaging parameters.
Choirul Anam, Riska Amilia, Ariij Naufal, Heri Sutanto, Wahyu S. Budi, Geoff Dougherty   +5 more
doaj   +3 more sources

Methods for Enhancing the Robustness of the Generalized Contrast-to-Noise Ratio. [PDF]

IEEE Trans Ultrason Ferroelectr Freq Control, 2023
The generalized contrast-to-noise ratio (gCNR) is a new but increasingly popular metric for measuring lesion detectability due to its use of probability distribution functions that increase robustness against transformations and dynamic range alterations.
Schlunk S, Byram BC.
europepmc   +5 more sources

Application of the generalized contrast-to-noise ratio to assess photoacoustic image quality. [PDF]

Biomed Opt Express, 2020
The generalized contrast-to-noise ratio (gCNR) is a relatively new image quality metric designed to assess the probability of lesion detectability in ultrasound images. Although gCNR was initially demonstrated with ultrasound images, the metric is theoretically applicable to multiple types of medical images.
Kempski KM, Graham MT, Gubbi MR, Palmer T, Lediju Bell MA.   +4 more
europepmc   +4 more sources

The Feasibility of Contrast-to-Noise Ratio on Measurements to Evaluate CT Image Quality in Terms of Low-Contrast Detailed Detectability [PDF]

Medical Sciences, 2020
Background: To evaluate contrast-to-noise ratio (CNR) measurements in assessing image quality, in the context of the detectability performance of low-contrast detail (LCD), in computed tomography (CT) images, since exposure to elevated ionising-type ...
Haney A Alsleem, Hussain M Almohiy
doaj   +2 more sources

Assessment of subjective image quality, contrast to noise ratio and modulation transfer function in the middle ear using a novel full body cone beam computed tomography device. [PDF]

BMC Med Imaging, 2023
Heikkinen AK, Rissanen V, Aarnisalo AA, Nyman K, Sinkkonen ST, Koivisto J.   +5 more
europepmc   +3 more sources

Assessment of Iodine Contrast-To-Noise Ratio in Virtual Monoenergetic Images Reconstructed from Dual-Source Energy-Integrating CT and Photon-Counting CT Data. [PDF]

Diagnostics (Basel), 2022
Booij R, van der Werf NR, Dijkshoorn ML, van der Lugt A, van Straten M.   +4 more
europepmc   +3 more sources

Chest Radiography Optimization: Identifying the Optimal kV for Image Quality in a Phantom Study [PDF]

Journal of Imaging
Chest radiography remains one of the most frequently performed imaging examinations, highlighting the need for optimization of acquisition parameters to balance image quality and radiation dose. This study presents a phantom-based quantitative evaluation
Ioannis Antonakos, Kyriakos Kokkinogoulis, Maria Giannopoulou, Efstathios P. Efstathopoulos   +3 more
doaj   +2 more sources

Spatial localization of mechanical excitation affects spatial resolution, contrast, and contrast-to-noise ratio in acoustic radiation force optical coherence elastography. [PDF]

Biomed Opt Express, 2019
Leartprapun N, Iyer RR, Mackey CD, Adie SG.   +3 more
europepmc   +2 more sources

Signal and contrast to noise ratio evaluation of fluoroscopic loops for interventional fluoroscope quality control. [PDF]

J Appl Clin Med Phys, 2019
Goode AR, Snyder C, Snyder A, Collins P, DeLorenzo M, Lin PJ.   +5 more
europepmc   +3 more sources