Ultrasound echo averaging: A simple method for improving image perception
✍ Scribed by Royal J. Bartrum Jr.; Harte C. Crow
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 199 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0091-2751
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✦ Synopsis
Technological improvements have resulted in ultrasound scanners with greater dynamic range and resolution than the machines of 5 years ago, but present-day scans are often more difficult to read because perception of the overall image and identification of organ boundaries and vessels are not as easily accomplished. The cause of this phenomenon is not clear. The major effect of improved scan technology has been the ability to receive and record parenchymal echoes of extremely low levels from very small interfaces. Perhaps "noise" in the image has also increased. Much of this noise may arise from weak internal reverberation echoes, that is, echoes that are produced from sound beam reverberation between two interfaces within the patient. In earlier scanners, most of this noise was below the threshold of the machine, and consequently it was not re-'Picker Scholar, James Picker Foundation.