Assessing CT acquisition parameters with visual-search model observers
نویسندگان
چکیده
منابع مشابه
Happy with a difference, unhappy with an identity: observers' mood determines processing depth in visual search.
Visual search for feature targets was employed to investigate whether the mechanisms underlying visual selective attention are modulated by observers' mood. The effects of induced mood on overall mean reaction times and on changes and repetitions of target-defining features and dimensions across consecutive trials were measured. The results showed that reaction times were significantly slower i...
متن کاملCardiac PET/CT with Rb-82: optimization of image acquisition and reconstruction parameters
BACKGROUND Our aim was to characterize the influence of time-of-flight (TOF) and point spread function (PSF) recovery corrections, as well as ordered subset expectation maximization (OSEM) reconstruction parameters, in 82Rb PET/CT quantification of myocardial blood flow (MBF) and myocardial flow reserve (MFR). Rest and stress list-mode dynamic 82Rb PET acquisition data from 10 patients without ...
متن کاملAssessing the GOANNA Visual Field Algorithm Using Artificial Scotoma Generation on Human Observers
PURPOSE To validate the performance of a new perimetric algorithm (Gradient-Oriented Automated Natural Neighbor Approach; GOANNA) in humans using a novel combination of computer simulation and human testing, which we call Artificial Scotoma Generation (ASG). METHODS Fifteen healthy observers were recruited. Baseline conventional automated perimetry was performed on the Octopus 900. Visual fie...
متن کاملCurrent Progress With a Model of Visual Search
performance, specifically of search tasks in which an observer looks for a target object among some number of distracting items. Classically, models have described two mechanisms of search: serial and parallel (Egeth, 1966). In serial search, attention is directed to one item at a time, allowing each item to be classified as a target or a distractor in turn (Sternberg, 1966). Parallel models pr...
متن کاملAttentional capacity limit for visual search causes spatial neglect in normal observers
When observers simultaneously monitor several positions in the visual field, distracting stimuli have a devastating effect on the ability to discriminate between similar shapes. For example, the minimum tilt necessary for an observer to discriminate between a clockwise and anticlockwise tilt has been shown to increase with the square root of the number of untilted distractors. Here we show that...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Medical Imaging
سال: 2018
ISSN: 2329-4302
DOI: 10.1117/1.jmi.5.2.025501