Search results for "Contrast"

Recognition of briefly presented familiar and unfamiliar faces

2009

Early processing stages in the perception of familiar and unfamiliar faces were studied in four experiments by varying the type of available facial information in a four alternative forced choice recognition task. Both reaction time and recognition accuracy served as dependent measures. The observed data revealed an asymmetry in processing familiar and unfamiliar faces. A markedly weak inversion effect and strong blurring effect suggest a limited usage of spatial relations within early processing stages of unfamiliar faces. Recognition performance for whole familiar faces did not deteriorate due to blurring or the presentation of isolated internal features, suggesting a low level of represe…

Characterization of hypoechoic focal hepatic lesions in patients with fatty liver: diagnostic performance and confidence of contrast-enhanced ultraso…

2007

Caratterizzazione delle lesioni focali epatiche ipoecogene in pazienti con fegato steatosico: “performance” e livello di confidenza diagnostica dell’…

2007

Imaging findings of hepatic Focal Nodular Hyperplasia (FNH) in Gadoxetic Acid vs Gadobenate Dimeglumine-enhanced MR: preliminary results

2009

Imaging findings of hepatic focal nodular hyperplasia in Gd-EOB-DTPA vs Gd-BOPTA -enhanced MR: preliminary results.

2009

Hepatic focal nodular hyperplasia: detection of spoke-wheel sign and central scar at contrast-enhanced ultrasound

2007

<title>Selective filters for improvement of color discrimination</title>

2003

Colored filters have been used as possible aids for perception in case of congenital color vision abnormalities. Higher stimulation for L cones in one eye (red filter) and for M cones (green) in other eye acts as a simple method to interfere in human color vision processing. Influence on subjective and objective vision performances as binocular functions, fusion, stereopsis and color vision has been tested. Special colored glasses have been created, taking into account each subjects refraction for distance and tested for the 5 months adaption time. No negative influence on binocular functions, no changes of heterophoria and lowering in fusion ability and stereopsis have been stated due to u…

There is more to accommodation of the eye than simply minimizing retinal blur

2017

Eyes of children and young adults change their optical power to focus nearby objects at the retina. But does accommodation function by trial and error to minimize blur and maximize contrast as is generally accepted? Three experiments in monocular and monochromatic vision were performed under two conditions while aberrations were being corrected. In the first condition, feedback was available to the eye from both optical vergence and optical blur. In the second, feedback was only available from target blur. Accommodation was less precise for the second condition, suggesting that it is more than a trial-and-error function. Optical vergence itself seems to be an important cue for accommodation.

Cecal trap: CT findings of isolated cecal necrosis

2016

Learning objectives Background Findings and procedure details Conclusion Personal information References

Multiplanar and Multiparametric MR Enterography in Crohn’s disease

2015

Learning objectives Background Findings and procedure details Conclusion Personal information References