Method for Recovering Lost Ultrasonic Information Using the Echo-intensity Mean.

In this report, we investigate the source of this limitation by examining the transfer of high-resolution information from the tissue impedance variance throughout the imaging process. For that purpose, we express the mean and variance of the echo-intensity signal as a linear system to track the flow of object information along the image-formation chain. The results reveal how demodulation influences the available information by discarding high spatial-frequency information. This analysis further points to a simple way to recover lost information with only a minor addition to signal processing. Software phantoms are used to show that under ideal conditions, information from small-scale high-contrast reflectors, such as microcalcifications, can be significantly enhanced with this simple change to echo processing.
PMID: 29848216 [PubMed - as supplied by publisher]

Source: Ultrasonic Imaging - June 1, 2018 Category: Radiology Tags: Ultrason Imaging Source Type: research