Conference paper
Influence of insonification angle on echogenicity of B-mode images of atherosclerotic plaque in vitro
A newly developed (off-line) spatial compound scanner was used to scan formalin-fixed atherosclerotic carotid plaques. Forty-eight B-mode images were recorded using 7 insonification angles. All calculations were done on the envelope-detected image data. The mean amplitude level (MAL) in (relative) volts was calculated for the plaque region in each image.
The standard deviation over the 48 MAL values were for each of the 7 angles between 0.12 V and 0.18 V. For each scan plane, the standard deviation was also calculated over the 7 images. The mean and standard deviation of these 48 numbers were 0.07 V and 0.04 V, respectively. Thus based on these data, the variation from scan plane to scan plane is normally larger than the variation over angle for a single scan plane
Language: | English |
---|---|
Year: | 1998 |
Pages: | 1599-1602 |
Proceedings: | 1998 IEEE Ultrasonics Symposium |
ISBN: | 0780340957 and 9780780340954 |
ISSN: | 15513025 and 10510117 |
Types: | Conference paper |
DOI: | 10.1109/ULTSYM.1998.765250 |
ORCIDs: | Wilhjelm, Jens E. |
Acoustic transducers Apertures B-mode images Control systems Displays In vivo Signal processing Surgery Switches Ultrasonic imaging Workstations acoustic signal processing atherosclerotic plaque in vitro biomedical ultrasonics blood vessels echogenicity envelope-detected image data formalin-fixed atherosclerotic carotid plaque image generation image outlining image sampling image segmentation insonification angle influence logarithmic images mean amplitude level mean deviation medical image processing scan plane to scan plane variation spatial compound scanner standard deviation stroke risk