Results 31 to 40 of about 4,603,420 (293)

Temporal contrast sensitivity with peripheral and central stimulation in glaucoma diagnosis [PDF]

British Journal of Ophthalmology, 1999
To evaluate temporal contrast sensitivity with full field, peripheral, and central stimulation and to determine the most sensitive corresponding retinal area for glaucoma damage.Temporal contrast sensitivity was determined either with a full field, a peripheral annular area from 30 degrees to 90 degrees, or a central area from 0 degree to 30 degrees at
I M, Velten, M, Korth, F K, Horn, W M, Budde   +3 more
openaire   +2 more sources

Contrast sensitivity and discrimination in pictorial images [PDF]

, 2014
This paper describes continuing research concerned with the measurement and modeling of human spatial contrast sensitivity and discrimination functions, using complex pictorial stimuli.
Gupta, G., Triantaphillidou, S., Jarvis, J.   +2 more
core   +1 more source

Peeling Plaids Apart: Context Counteracts Cross-Orientation Contrast Masking [PDF]

, 2009
Background: Contrast discrimination for an image is usually harder if another image is superimposed on top. We asked whether such contrast masking may be enhanced or relieved depending on cues promoting integration of both images as a single pattern ...
Verghese, P., Preeti Verghese, Freeman, E, Verghese, P, Freeman, E. D., Elliot Freeman   +5 more
core   +2 more sources

Correlation of Multidetector Computed Tomography Peripheral Angiography with Color Duplex Sonography in Peripheral Arterial Disease

Journal of Nepal Health Research Council, 2022
Background: With aging of the global population peripheral arterial disease is increasingly common. Arteriography, computed tomography angiography and magnetic resonance angiography are common modalities used for evaluation of peripheral arterial ...
Rameshwor Devkota, Birendra Raj Joshi, Kamal Subedi, Ranjit Chaudhary, Ramila Devkota, Saroja Bashyal, Isha Amatya, Pradeep Raj Regmi   +7 more
doaj   +1 more source

Contrast sensitivity in images of natural scenes [PDF]

, 2019
The contrast sensitivity function (CSF) characterizes spatial detection in the human visual system and is typically measured from simple, synthetic stimuli.
Gupta, G., Triantaphillidou, S., Psarrou, A., Jarvis, J.   +3 more
core   +1 more source

Visual functions and disability in diabetic retinopathy patients

Journal of Optometry, 2014
Purpose: This study was undertaken to find correlations between visual functions and visual disabilities in patients with diabetic retinopathy. Method: A cross-sectional study was carried out among 38 visually impaired diabetic retinopathy subjects at ...
Gauri Shankar Shrestha, Raju Kaiti
doaj   +1 more source

Effect of Contrast and Adaptation on the Perception of the Direction and Speed of Drifting Gratings [PDF]

, 1994
Three experiments were conducted to analyse the effect of contrast and adaptation state on the ability of human observers to discriminate the motion of drifting gratings.
Müller, Rolf, Müller, R., Greenlee, Mark W.   +2 more
core   +1 more source

Improved Visualization of Prostate Cancer Using Multichannel Computed Diffusion Images: Combining ADC and DWI

Diagnostics, 2022
(1) Background: For the peripheral zone of the prostate, diffusion weighted imaging (DWI) is the most important MRI technique; however, a high b-value image (hbDWI) must always be evaluated in conjunction with an apparent diffusion coefficient (ADC) map.
Matthias Hammon, Marc Saake, Frederik B. Laun, Rafael Heiss, Nicola Seuss, Rolf Janka, Alexander Cavallaro, Michael Uder, Hannes Seuss   +8 more
doaj   +1 more source

Characterization of spatial aliasing and contrast sensitivity in peripheral vision

Vision Research, 1996
Psychometric performance was measured for contrast detection and spatial resolution tasks in foveal and peripheral vision. Objective evidence was obtained for a quantitative difference between resolution acuity and detection acuity in the peripheral field.
Thibos, Larry N., Still, David L., Bradley, Arthur   +2 more
openaire   +2 more sources

Laboratory implementation of edge illumination X-ray phase-contrast imaging with energy-resolved detectors [PDF]

, 2015
Edge illumination (EI) X-ray phase-contrast imaging (XPCI) has potential for applications in different fields of research, including materials science, non-destructive industrial testing, small-animal imaging, and medical imaging.
A. Olivo, De Ruvo, L, Endrizzi, M., Kallon, G, SPANDRE, GLORIA, G. Spandre, Vincenzi, A, Kallon, G., A. Brez, Hagen, C. K., Olivo, A, L. De Ruvo, Basta, D, P. C. Diemoz, F. A. Vittoria, Hagen, CK, Olivo, A., C. K. Hagen, Spandre, G, Brez, A., M. Marenzana, Brez, A, DELOGU, PASQUALE, Vittoria, F. A., Marenzana, M., Bellazzini, R, Diemoz, P. C., Vincenzi, A., BELLAZZINI, RONALDO, A. Vincenzi, D. Basta, M. Endrizzi, G. Kallon, R. Bellazzini, Diemoz, PC, Vittoria, FA, Delogu, P, Endrizzi, M, Marenzana, M, De Ruvo, L., Basta, D., P. Delogu   +41 more
core   +1 more source