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. 2023 Dec;55(S 01):E529-E531.
doi: 10.1055/a-2037-5802. Epub 2023 Mar 9.

Novel low echo reduction function reduces artifacts in endoscopic ultrasound observation of the gallbladder

Haruka Toyonaga  1 , Tsuyoshi Hayashi  1 , Toshifumi Kin  1 , Masayo Motoya  1 , Kuniyuki Takahashi  1 , Akio Katanuma  1
Affiliations

Novel low echo reduction function reduces artifacts in endoscopic ultrasound observation of the gallbladder

Haruka Toyonaga et al. Endoscopy. 2023 Dec.
No abstract available

PubMed Disclaimer

Conflict of interest statement

Dr. Katanuma has received a lecture fee from Olympus Co., Tokyo, Japan. The remaining authors declare that they have no conflicts of interest.

Figures

Fig. 1
Fig. 1
Endoscopic ultrasound (EUS) images of the gallbladder obtained using a radial-type scope (GF-UE290; Olympus) and a new EUS processor (EVIS EUS EU-ME3; Olympus) showing the appearance on: a B-mode 6 MHz; b tissue harmonic echo (THE) mode; c THE with increasing low echo reduction (LER) at Lv.7, which suppresses low echo areas while maintaining high echo areas, thereby improving contrast without whiteout.
Fig. 2
Fig. 2
Endoscopic ultrasound (EUS) images of the gallbladder showing the appearance on: a tissue harmonic echo (THE) mode; b THE with increasing low echo reduction (LER) at Lv.8, which suppresses multiple reflection artifacts and makes it easy to recognize the boundaries of the gallbladder wall and lesions. Although LER has a risk of missing small findings or lesions, small polyps are not obscured.
Fig. 3
Fig. 3
Endoscopic ultrasound (EUS) images of the gallbladder showing the appearance on: a tissue harmonic echo (THE) mode; b THE with increasing low echo reduction (LER) at Lv.8, which suppresses the artifacts and makes it easier to see the edges of the lesion in situations where artifacts are covering the lesion, making it difficult to see its edges.
See this image and copyright information in PMC

References

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    1. Hashimoto S, Nakaoka K, Kawabe N et al. The role of endoscopic ultrasound in the diagnosis of gallbladder lesions. Diagnostics (Basel) 2021;11:1789. - PMC - PubMed
    1. Toyonaga H, Hayashi T, Ueki H et al. An intact boundary between the tumor and inner hypoechoic layer discriminates T1 lesions among sessile elevated gallbladder cancers. J Hepatobiliary Pancreat Sci. 2021;28:1121–1129. - PubMed