Results 41 to 50 of about 1,054,818 (327)

Benefits of low-dose carotid CT angiography in stroke patients

Journal of Health Sciences, 2023
Introduction: Computed tomography angiography (CTA) represents the gold standard as a method for the diagnosis of carotid artery diseases. The current topic is the use of CTA for the evaluation of carotid arteries with a reduction in the dose of ...
Haris Kurić, Spomenka Kristić, Melika Bukvić, Jasna Strika-Kurić, Sandra Vegar-Zubović, Adnan Beganović, Merim Jusufbegović, Fuad Julardžija, Adnan Šehić   +8 more
doaj   +1 more source

Comparison of Spatial and Temporal Averaging on Ultrafast Imaging in Presence of Quantization Errors [PDF]

, 2015
In compound plane wave imaging (CPWI), multiple plane waves are used to insonify the imaging region with different steering angles. The compounding operation is effectively a spatial averaging filter that reduces the speckles of the image and increases ...
Alomari, Z, Freear, S, Harput, S, Moubark, AM   +3 more
core   +1 more source

Acousto-optical coherence tomography with a digital holographic detection scheme [PDF]

, 2012
Acousto-optical coherence tomography (AOCT) consists in using random phase jumps on ultrasound and light to achieve a millimeter resolution when imaging thick scattering media. We combined this technique with heterodyne off-axis digital holography.
Benoit, Emilie, Bossy, Emmanuel, Farahi, Salma, Gross, Michel, Ramaz, François   +4 more
core   +5 more sources

Contrast-to-noise ratio in magnification mammography: a Monte Carlo study

Physics in Medicine and Biology, 2007
Magnification views are a common way to perform a secondary examination when suspicious abnormalities are found in a screening mammogram. The visibility of microcalcifications and breast lesions is restricted by the compromise between the image quality and the absorbed dose. In this study, image quality characteristics in magnification mammography were
Koutalonis, M., Delis, H., Spyrou, G., Costaridou, L., Tzanakos, G., Panayiotakis, G.   +5 more
openaire   +3 more sources

Enhancing the signal-to-noise ratio and generating contrast for cryo-EM images with convolutional neural networks

IUCrJ, 2020
In cryogenic electron microscopy (cryo-EM) of radiation-sensitive biological samples, both the signal-to-noise ratio (SNR) and the contrast of images are critically important in the image-processing pipeline.
Eugene Palovcak, Daniel Asarnow, Melody G. Campbell, Zanlin Yu, Yifan Cheng   +4 more
doaj   +1 more source

An in vivo probabilistic atlas of the human locus coeruleus at ultra-high field

NeuroImage, 2021
Early and profound pathological changes are evident in the locus coeruleus (LC) in dementia and Parkinson's disease, with effects on arousal, attention, cognitive and motor control.
Rong Ye, Catarina Rua, Claire O'Callaghan, P. Simon Jones, Frank H. Hezemans, Sanne S. Kaalund, Kamen A. Tsvetanov, Christopher T. Rodgers, Guy Williams, Luca Passamonti, James B. Rowe   +10 more
doaj   +1 more source

3D MR neurography with gadolinium contrast to improve the visualization of pelvic nerves and the branches

Frontiers in Physiology
ObjectiveTo evaluate the effectiveness of 3D NerveVIEW sequence with gadolinium contrast on the visualization of pelvic nerves and their branches compared to that without contrast.MethodsParticipants were scanned twice using 3D NerveVIEW sequence with ...
Hui Liu, Zhibo Xiao, Li Tao, Mingmei Tang, Yong Xu, Yuanrui Pan, Ke Zhang, Xueke Qiu, Fajin Lv, Fajin Lv   +9 more
doaj   +1 more source

Enhancing qubit readout through dissipative sub-Poissonian dynamics

, 2017
Single-shot qubit readout typically combines high readout contrast with long-lived readout signals, leading to large signal-to-noise ratios and high readout fidelities.
Coish, William A., D'Anjou, Benjamin
core   +1 more source

On the difference-to-sum power ratio of speech and wind noise based on the Corcos model

, 2018
The difference-to-sum power ratio was proposed and used to suppress wind noise under specific acoustic conditions. In this contribution, a general formulation of the difference-to-sum power ratio associated with a mixture of speech and wind noise is ...
Habets, Emanuël A. P., Mirabilii, Daniele   +1 more
core   +1 more source

Super-resolution deep learning reconstruction at coronary computed tomography angiography to evaluate the coronary arteries and in-stent lumen: an initial experience

BMC Medical Imaging, 2023
A super-resolution deep learning reconstruction (SR-DLR) algorithm trained using data acquired on the ultrahigh spatial resolution computed tomography (UHRCT) has the potential to provide better image quality of coronary arteries on the whole-heart ...
Makoto Orii, Misato Sone, Takeshi Osaki, Yuta Ueyama, Takuya Chiba, Tadashi Sasaki, Kunihiro Yoshioka   +6 more
doaj   +1 more source