Diagnostic ultrasound ( PDFDrive )

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APPENDIX
Ultrasound Artifacts: A Virtual Chapter
Blooming Artifact
Blooming artifact occurs when color reaches beyond the vessel
wall, making the vessels look larger than expected. It is gain
dependent in that lowering the gain will decrease blooming. It
is also wall ilter and color-overwrite dependent, in that increasing
the wall ilter will decrease the artifact.
A
B
FIG. A.64 Blooming Artifact. Two images of the same carotid artery. In (A) the gain and wall ilter are appropriate to show the low centrally
in the vessel. In (B) the gain and wall ilter have been changed (in a manner beyond what would be used in clinical imaging) to demonstrate how
these can make the vessel “bloom” and appear larger.
A
B
FIG. A.65 Blooming artifact due to use of contrast and tissue motion. (A) Use of contrast material creates color Doppler artifacts owing to
blooming and tissue motion. (B) Contrast-speciic imaging shows blood vessels not seen with Doppler. 25 (See Chapter 3, Fig. 3.7.)