Colour Doppler Spatial Resolution Performance Testing

Spatial and Wavenumber Resolution of Doppler Reflectometry

Performance Testing of Ultrasound Doppler Equipment

........................................................................................................................ III List of Papers ................................................................................................................ IV

Ultrasonic colour Doppler imaging.

Ultrasonic colour Doppler is an imaging technique that combines anatomical information derived using ultrasonic pulse-echo techniques with velocity information derived using ultrasonic Doppler techniques to generate colour-coded maps of tissue velocity superimposed on grey-scale images of tissue anatomy. The most common use of the technique is to image the movement of blood through the heart, a...

A Multi-Resolution, Full-Colour Spatial Gamut Mapping Algorithm

A multi–resolution, full–colour spatial gamut mapping algorithm (GMA) is proposed in this paper. Its aim is to maintain as much of an original image’s overall, and in particular spatial, information as possible within the limits of a reproduction medium’s gamut. First, the original image is decomposed into different spatial frequency bands. Second, lightness compression and initial gamut mappin...

Spatial attention improves performance in spatial resolution tasks.

This study used peripheral precueing to explore the effect of covert transient attention on performance in spatial resolution tasks. Experiments 1 (Landolt-square) and 2 ('broken-line') measured gap resolution and Experiment 3 measured vernier resolution. In all three tasks the target was presented alone in a large number of possible locations, ranging from 1.5-6 degrees of eccentricity in the ...