Endogenous motion of liver correlates to the severity of portal hypertension

doi:10.3748/wjg.v26.i38.5836

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Oct 14, 2020 (publication date) through Nov 6, 2024

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World Journal of Gastroenterology

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1007-9327

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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World J Gastroenterol. Oct 14, 2020; 26(38): 5836-5848
Published online Oct 14, 2020. doi: 10.3748/wjg.v26.i38.5836

Table 1 Investigated endogenous motion parameters

No.	Parameter	Description
1	d_antero	Maximal amplitude of endogenous displacements towards the probe, μm
2	d_retro	Maximal amplitude of the displacements backward, μm
3	d_RMS	Average level of motion, μm
4	µ_{ROI[0…10 Hz, 2 cm × 2 cm]}	Average strain [estimated for the 0…10 Hz sub-band of endogenous motion in the 2 cm × 2 cm ROI], μm/cm
5	σ_{ROI[0…10 Hz, 2 cm × 2 cm]}	Standard deviation of strain [0…10 Hz, 2 cm × 2 cm], μm/cm
6	µ_{ROI[0…10 Hz, 1 cm × 1 cm]}	Average strain [0…10 Hz, 1 cm × 1 cm], μm/cm
7	σ_{ROI[0…10 Hz, 1 cm × 1 cm]}	Standard deviation of strain [0…10 Hz, 1 cm × 1 cm], μm/cm
8	µ_{ROI[10…20 Hz, 2 cm × 2 cm]}	Average strain [10…20 Hz, 2 cm × 2 cm], μm/cm
9	σ_{ROI[10…20 Hz, 2 cm × 2 cm]}	Standard deviation of strain [10…20 Hz, 2 cm × 2 cm], μm/cm
10	µ_{ROI[10…20 Hz, 1 cm × 1 cm]}	Average strain [10…20 Hz, 1 cm × 1 cm], μm/cm
11	σ_{ROI[10…20 Hz, 1 cm × 1 cm]}	Standard deviation of strain [10…20 Hz, 1 cm × 1 cm], μm/cm

ROI: Region of interest; RMS: Root mean square.

Citation: Gelman S, Sakalauskas A, Zykus R, Pranculis A, Jurkonis R, Kuliavienė I, Lukoševičius A, Kupčinskas L, Kupčinskas J. Endogenous motion of liver correlates to the severity of portal hypertension. World J Gastroenterol 2020; 26(38): 5836-5848
URL: https://www.wjgnet.com/1007-9327/full/v26/i38/5836.htm
DOI: https://dx.doi.org/10.3748/wjg.v26.i38.5836