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. 2021 Feb 6;24(2):131–142. doi: 10.1007/s40477-021-00563-1

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© The Author(s) 2021

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Fig. 3 — Linear probe using high-frequency transducers can better visualise the gallbladder wall layers. The image depicts three layers of the gallbladder wall including the innermost hyperechoic layer (white arrow), the middle thin hypoechoic layer (red arrow), and the outermost hyperechoic layer (yellow arrow)