Results 21 to 30 of about 328,836 (254)
Radiology and Oncology, 2022 PET/CT imaging is widely used in oncology and provides both metabolic and anatomic information. Because of the relatively poor spatial resolution of PET, the detection of small lesions is limited.
Rep Sebastijan +5 more
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Frontiers in Human Neuroscience, 2022 Delineation of the subthalamic nuclei (STN) on MRI is critical for deep brain stimulation (DBS) surgery in patients with Parkinson’s disease (PD). We propose this retrospective cohort study for quantitative analysis of MR signal-to-noise ratio (SNR ...
Chun-Yu Su +13 more
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The Effects Of High Dose and Low Dose Protocols In Thorax’s CT Scan Image Quality
Indonesian Journal of Applied Physics, 2021 The aim of this research was to evaluate the effects of two different dose protocols’ usage on image quality. This research was performed on three different CT Scanners using high dose and low dose protocols of thorax scan.
Ni Larasati Kartika Sari +3 more
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Enhancement of microvessel in laser speckle image using gaussian kernel template [PDF]
Journal of Innovative Optical Health Sciences, 2019 Laser speckle contrast imaging (LSCI) is an optical imaging method, which can monitor microvascular flow variation directly without addition of any ectogenous dye.
Yameng Zhang +4 more
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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 +8 more
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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. +5 more
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Applied Sciences, 2021 In this study, we examine the quality of microscale ghost images as a function of the measured histographic signal distribution of the speckle fields from a nonuniform pseudothermal light source.
Zhe Sun +2 more
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Improvements in elastographic contrast-to-noise ratio using spatial-angular compounding [PDF]
Ultrasound in Medicine & Biology, 2005 Spatial-angular compounding is a new technique developed for improving the signal-to-noise ratio (SNR) in elastography. Under this method, elastograms of a region-of-interest (ROI) are obtained from a spatially weighted average of local strain estimated along different insonification angles.
Udomchai, Techavipoo, Tomy, Varghese
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Frontiers in PhysiologyObjectiveTo 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 +9 more
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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 +4 more
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