scholarly journals Radiology image perception and observer performance: How does expertise and clinical information alter interpretation? Stroke detection explored through eye-tracking

2009 ◽  
Author(s):  
Lindsey Cooper ◽  
Alastair Gale ◽  
Iain Darker ◽  
Andoni Toms ◽  
Janak Saada
Keyword(s):  
Eye Tracking ◽  
Clinical Information ◽  
Observer Performance ◽  
Image Perception ◽  
Radiology Image

scholarly journals Impact of Working Experience on Image Perception and Image Evaluation Approaches in Stroke Imaging: Results of an Eye-Tracking Study

2019 ◽  
Vol 191 (09) ◽  
pp. 836-844
Author(s):  
Sara Kammerer ◽  
Christoph Schülke ◽  
Martin Dominik Leclaire ◽  
Wolfram Schwindt ◽  
Aglae Velasco Gonzalez ◽  
...  
Keyword(s):  
Eye Tracking ◽  
Tracking System ◽  
Cerebrovascular Diseases ◽  
Ct Images ◽  
Lesion Detection ◽  
Professional Experience ◽  
Systematic Observation ◽  
Image Perception ◽  
Imaging Results ◽  
Different Levels

Purpose Higher rates of missed pathologies, caused by a lack of professional experience or systematic search, suggest that a methodical approach to radiological analysis can be learned. Thus, the aim of this study is to investigate the efficiency of different principles of screening stroke CTs for cerebrovascular diseases between radiologists and neuroradiologists with different levels of experience in relation to professional experience. Methods A set of anonymous CT images of 20 patients, with a suspected stroke, was individually presented to 12 radiologists with different levels of professional experience. Meanwhile, their fixation position was recorded by an eye-tracking system. For statistical analysis, the interobserver variability and accuracy of lesion detection were evaluated, taking the individual level of professional experience into account. Results The sensitivity of the observer depends on the professional experience, also determined by a systematic observation sequence and knowledge of the course of the disease. The duration of eye fixation with inexperienced assessors was significantly longer for conspicuous findings, while experienced assessors were more likely to fix clinically relevant regions. The retention time of ocular fixation in important pathological findings did not differ significantly between those groups. Conclusion Our results indicate that experienced radiologists are reducing the number of missed findings through a systematic approach and targeted inspection of important regions. Through raising the awareness of analyzing CT images in systematic patterns, physicians at all levels of experience seem to be able to improve their performance. Key points:  Citation Format

scholarly journals Radiology Image Interpretation System: Modified observer performance study of an image interpretation expert system

1991 ◽  
Vol 4 (2) ◽  
pp. 94-101 ◽  
Author(s):  
David Piraino ◽  
Bradford Richmond ◽  
Mark Schluchter ◽  
Daniel Rockey ◽  
Jean Schils
Keyword(s):  
Expert System ◽  
Image Interpretation ◽  
Observer Performance ◽  
Performance Study ◽  
Interpretation System ◽  
Radiology Image

An Eye-Tracking Study on Audiovisual Speech Perception Strategies Adopted by Normal-Hearing and Deaf Adults Under Different Language Familiarities

2020 ◽  
Vol 63 (7) ◽  
pp. 2245-2254 ◽  
Author(s):  
Jianrong Wang ◽  
Yumeng Zhu ◽  
Yu Chen ◽  
Abdilbar Mamat ◽  
Mei Yu ◽  
...  
Keyword(s):  
Speech Perception ◽  
Eye Tracking ◽  
Normal Hearing ◽  
Audiovisual Speech ◽  
Audiovisual Speech Perception ◽  
Allocation Pattern ◽  
Deaf Adults ◽  
Bilingual Speaker ◽  
Primary Hypothesis ◽  
Standard Chinese

Purpose The primary purpose of this study was to explore the audiovisual speech perception strategies.80.23.47 adopted by normal-hearing and deaf people in processing familiar and unfamiliar languages. Our primary hypothesis was that they would adopt different perception strategies due to different sensory experiences at an early age, limitations of the physical device, and the developmental gap of language, and others. Method Thirty normal-hearing adults and 33 prelingually deaf adults participated in the study. They were asked to perform judgment and listening tasks while watching videos of a Uygur–Mandarin bilingual speaker in a familiar language (Standard Chinese) or an unfamiliar language (Modern Uygur) while their eye movements were recorded by eye-tracking technology. Results Task had a slight influence on the distribution of selective attention, whereas subject and language had significant influences. To be specific, the normal-hearing and the d10eaf participants mainly gazed at the speaker's eyes and mouth, respectively, in the experiment; moreover, while the normal-hearing participants had to stare longer at the speaker's mouth when they confronted with the unfamiliar language Modern Uygur, the deaf participant did not change their attention allocation pattern when perceiving the two languages. Conclusions Normal-hearing and deaf adults adopt different audiovisual speech perception strategies: Normal-hearing adults mainly look at the eyes, and deaf adults mainly look at the mouth. Additionally, language and task can also modulate the speech perception strategy.

Activation and Persistence of Implicit Causality Information in Spoken Language Comprehension

2010 ◽  
Vol 57 (1) ◽  
pp. 5-16 ◽  
Author(s):  
Pirita Pyykkönen ◽  
Juhani Järvikivi
Keyword(s):  
Eye Tracking ◽  
Language Comprehension ◽  
Spoken Language ◽  
Visual World ◽  
Implicit Causality ◽  
Causality Information ◽  
Spoken Language Comprehension

A visual world eye-tracking study investigated the activation and persistence of implicit causality information in spoken language comprehension. We showed that people infer the implicit causality of verbs as soon as they encounter such verbs in discourse, as is predicted by proponents of the immediate focusing account ( Greene & McKoon, 1995 ; Koornneef & Van Berkum, 2006 ; Van Berkum, Koornneef, Otten, & Nieuwland, 2007 ). Interestingly, we observed activation of implicit causality information even before people encountered the causal conjunction. However, while implicit causality information was persistent as the discourse unfolded, it did not have a privileged role as a focusing cue immediately at the ambiguous pronoun when people were resolving its antecedent. Instead, our study indicated that implicit causality does not affect all referents to the same extent, rather it interacts with other cues in the discourse, especially when one of the referents is already prominently in focus.

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