Threshold recognition of phantom-contour objects requires constant contrast velocity

Recognition of Partially Occluded Elliptical Objects using Symmetry on Contour

There are many research efforts in object recognition. Most existing methods for object recognition are based on full objects. However, many images contain multiple objects with occluded shapes and regions. Due to the occlusion of objects, image retrieval can provide incomplete, uncertain, and inaccurate results. To resolve this problem, we propose a new method to reconstruct objects using symm...

Accuracy of four-dimensional phase-contrast velocity mapping for blood flow visualizations: a phantom study

Accuracy of four-dimensional phase-contrast velocity mapping for blood flow visualizations: a phantom study

Accuracy of four-dimensional phase-contrast velocity mapping for blood flow visualizations: a phantom study

Accuracy of four-dimensional phase-contrast velocity mapping for blood flow visualizations: a phantom study.

BACKGROUND Time-resolved three-dimensional, three-directional phase-contrast magnetic resonance velocity mapping (4D PC-MRI) is a powerful technique to depict dynamic blood flow patterns in the human body. However, the impact of phase background effects on flow visualizations has not been thoroughly studied previously, and it has not yet been experimentally demonstrated to what degree phase off...