About this trial
The goal of this observational study is to establish preliminary reference values for Endoscopic Ultrasound (EUS)-guided Attenuation Imaging (ATI) and Shear Wave Elastography (SWE) in adults undergoing diagnostic EUS for non-hepatobiliary indications who have normal FibroScan findings. The main questions it aims to answer are:
What are the preliminary normal reference values for EUS-guided ATI in the right and left hepatic lobes? What are the preliminary normal reference values for EUS-guided SWE elasticity (kPa) and velocity (m/s) in the right and left hepatic lobes?
Participants will:
Undergo same-day FibroScan assessment to confirm normal liver stiffness and steatosis parameters.
Undergo EUS-guided ATI and SWE measurements of both the right and left hepatic lobes during their clinically indicated diagnostic EUS examination.
Have demographic, clinical, and laboratory information recorded for analysis.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Adults aged 18 years or older.
Undergoing clinically indicated diagnostic endoscopic ultrasound (EUS).
Same-day FibroScan examination available.
Controlled Attenuation Parameter (CAP) <238 dB/m.
Disqualifiers
Known chronic liver disease.
Hepatitis B or Hepatitis C infection.
Significant alcohol consumption.
Decompensated cirrhosis.
Trial population
Adults aged 18 years or older undergoing clinically indicated diagnostic endoscopic ultrasound (EUS) for non-hepatobiliary indications at AIG Hospitals will be screened for eligibility. Participants with normal FibroScan findings, defined as a Controlled Attenuation Parameter (CAP) \<238 dB/m and Liver Stiffness Measurement (LSM) \<7.5 kPa, who meet all eligibility criteria and provide written informed consent will be enrolled in the study.
Trial design
Cohort
Prospective
Treatments tested in this trial
Endoscopic Ultrasound (EUS)
Procedure/SurgeryA clinically indicated diagnostic endoscopic ultrasound will be performed according to standard institutional practice. During the examination, the liver will be visualized from the stomach and duodenum to allow quantitative liver assessment.
EUS-guided Attenuation Imaging (ATI)
Procedure/SurgeryAttenuation Imaging (ATI) will be performed during the diagnostic EUS to quantitatively assess hepatic steatosis. Five valid ATI measurements will be obtained from both the right and left hepatic lobes under direct EUS visualization. Measurements meeting predefined quality criteria will be used for analysis.
EUS-Guided Shear Wave Elastography (SWE)
Procedure/SurgeryShear Wave Elastography (SWE) will be performed during the diagnostic EUS to assess liver stiffness. Ten valid measurements will be obtained from both the right and left hepatic lobes. Shear wave velocity (m/s) and tissue elasticity (kPa) will be recorded, and only measurements meeting predefined quality criteria will be included in the analysis.
FibroScan
Procedure/SurgeryParticipants will undergo same-day FibroScan examination before EUS to confirm normal liver stiffness and steatosis. Controlled Attenuation Parameter (CAP) and Liver Stiffness Measurement (LSM) will be recorded, with at least 10 valid measurements and acceptable quality metrics required for study eligibility.
Treatment groups
Trial outcomes
Primary outcomes
Reference values for EUS-guided Attenuation Imaging (ATI)
To establish preliminary reference values for EUS-guided Attenuation Imaging (ATI) in the right and left hepatic lobes of adults with normal FibroScan findings. ATI values will be reported as mean ± standard deviation (SD), median (interquartile range \[IQR\]), and 95% reference intervals.
Reference values for EUS-guided Shear Wave Elastography (SWE) elasticity
To establish preliminary reference values for EUS-guided SWE elasticity (kPa) in the right and left hepatic lobes. Results will be reported as mean ± SD, median (IQR), and 95% reference intervals.
Reference values for EUS-guided Shear Wave Elastography (SWE) velocity
To establish preliminary reference values for EUS-guided SWE shear wave velocity (m/s) in the right and left hepatic lobes. Results will be reported as mean ± SD, median (IQR), and 95% reference intervals.
Secondary outcomes
Technical success rate
To determine the proportion of participants in whom acceptable EUS-guided ATI and SWE measurements are successfully acquired according to predefined quality criteria.
Measurement reliability
To evaluate the reliability and reproducibility of EUS-guided ATI and SWE measurements using predefined quality parameters.
Agreement between right and left hepatic lobe measurements
To assess agreement between ATI and SWE measurements obtained from the right and left hepatic lobes.
Correlation between ATI and FibroScan CAP
To evaluate the correlation between EUS-guided ATI measurements and FibroScan Controlled Attenuation Parameter (CAP).
Sponsors and contacts
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