Occult Regions of Suppressed Coherence in Liver B-Mode Images.
Clutter
Coherence
Image quality
Lag-one coherence
Liver imaging
Spatial coherence
Journal
Ultrasound in medicine & biology
ISSN: 1879-291X
Titre abrégé: Ultrasound Med Biol
Pays: England
ID NLM: 0410553
Informations de publication
Date de publication:
01 2022
01 2022
Historique:
received:
07
01
2021
revised:
01
07
2021
accepted:
06
09
2021
pubmed:
28
10
2021
medline:
28
1
2022
entrez:
27
10
2021
Statut:
ppublish
Résumé
Ultrasound is an essential tool for diagnosing and monitoring diseases, but it can be limited by poor image quality. Lag-one coherence (LOC) is an image quality metric that can be related to signal-to-noise ratio and contrast-to-noise ratio. In this study, we examine matched LOC and B-mode images of the liver to discern patterns of low image quality, as indicated by lower LOC values, occurring beneath the abdominal wall, near out-of-plane vessels and adjacent to hyperechoic targets such the liver capsule. These regions of suppressed coherence are often occult; they present as temporally stable uniform speckle on B-mode images, but the LOC measurements in these regions suggest substantially degraded image quality. Quantitative characterization of the coherence suppression beneath the abdominal wall reveals a consistent pattern both in simulations and in vivo; sharp drops in coherence occurring beneath the abdominal wall asymptotically recover to a stable coherence at depth. Simulation studies suggest that abdominal wall reverberation clutter contributes to the initial drop in coherence but does not influence the asymptotic LOC value. Clinical implications are considered for contrast loss in B-mode imaging and estimation errors for elastography and Doppler imaging.
Identifiants
pubmed: 34702640
pii: S0301-5629(21)00401-4
doi: 10.1016/j.ultrasmedbio.2021.09.007
pmc: PMC9969659
mid: NIHMS1868147
pii:
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
47-58Subventions
Organisme : NIBIB NIH HHS
ID : R01 EB017711
Pays : United States
Organisme : NIBIB NIH HHS
ID : R01 EB026574
Pays : United States
Informations de copyright
Copyright © 2021 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.
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