Assessment of hepatic fat content in using quantitative ultrasound measurement of hepatic/renal ratio and hepatic echo-intensity attenuation rate

Wang, Yunsheng; Zhang, Guiping; Xiao-mi, Yang; Ye, Jun; Cao, Yanfei; Zhang, Rong; Ye, Shuai; Xing, Shi-Mei; Shi, Erlan; Zhang, Ji; Lian, Hu; Xia, Jin-Xiang; Zhang, Qiu; Dai, Wei

doi:10.11152/mu-2522

Cited by 5 publications

(3 citation statements)

References 36 publications

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“…Our proposed adjustment for subcutaneous fat thickness is practical because it can be measured simultaneously with ultrasound manipulation when measuring velocity, and it is reasonable to assume that, for clinical use of SWV, the thicker the subcutaneous fat, the more likely it is that the ultrasound waves emitted by the echo probe will be attenuated by the subcutaneous fat [ 23 ]. It is a plausible explanation that thicker subcutaneous fat reduces SWV.…”

Section: Discussionmentioning

confidence: 99%

Quantification of muscle tone by using shear wave velocity during an anaesthetic induction: a prospective observational study

Saito,

Sugino,

Moteki

et al. 2023

BMC Anesthesiol

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Objectives The quantitative assessment of muscle stiffness or weakness is essential for medical care. Shear wave elastography is non-invasive ultrasound method and provides quantitative information on the elasticity of soft tissue. However, the universal velocity scale for quantification has not been developed. The aim of the study is to determine the shear wave velocities of abdominal muscle during anesthetic induction and to identify methods to cancel the effects of confounders for future development in the quantitative assessment of muscle tone using the universal scale. Methods We enrolled 75 adult patients undergoing elective surgery with ASA-PS I – III in the period between December 2018 and March 2021. We measured and calculated the shear wave velocity (SWV) before and after opioid administration (i.e., the baseline at rest and opioid-induced rigidity condition), and after muscle relaxant administration (i.e., zero reference condition). The SWV value was adjusted for the subcutaneous fat thickness by our proposed corrections. The SWVs after the adjustment were compared among the values in baseline, rigidity, and relaxation using one-way repeated-measures ANOVA and post hoc Tukey–Kramer test. A p-value of < 0.05 was considered to be statistically significant. UMIN Clinical Trials Registry identifier UMIN000034692, registered on October 30, 2018. Results The SWVs in the baseline, opioid-induced rigidity, and muscle relaxation conditions after the adjustment were 2.08 ± 0.48, 2.41 ± 0.60, and 1.79 ± 0.30 m/s, respectively (p < 0.001 at all comparisons). Conclusion The present study suggested that the SWV as reference was 1.79 m/s and that the SWVs at rest and opioid-induced rigidity were ~ 10% and ~ 30% increase from the reference, respectively. The SWV adjusted for the subcutaneous fat thickness may be scale points for the assessment of muscle tone.

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Section: Discussionmentioning

confidence: 99%

Quantification of muscle tone by using shear wave velocity during an anaesthetic induction: a prospective observational study

Saito,

Sugino,

Moteki

et al. 2023

BMC Anesthesiol

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“…MRI is an ideal and reliable way for fat quantification at present, which avoids radiation exposure by dual energy X-ray or quantitative CT. At the same time, ultrasonography can carry out direct and complete fat quantification [ 14 ]. On the other hand, all current noninvasive iron quantification methods are almost MRI-dependent.…”

Section: Discussionmentioning

confidence: 99%

Repeatability and Image Quality of IDEAL-IQ in Human Lumbar Vertebrae for Fat and Iron Quantification across Acquisition Parameters

Shan

Ding

Lin

et al. 2022

Computational and Mathematical Methods in Medicine

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Echo asymmetry and least square estimation-IQ (IDEAL-IQ) were used to quantify fat and iron to verify the effects of collection parameters on repeatability and image quality of water and fat in human vertebral body. Six IDEAL-IQ sequences were used to scan 48 healthy adult women. Reproducibility of fat and iron quantification and image quality were assessed for six IDEAL-IQ sequences. The results showed that the correlation index (0.987, 0.721) of FF and R2 ∗ between scans of sequence 2 was higher than that of other sequences, and the consistency of fat quantification was better than that of iron (0.860 vs. 0.579) ( P < 0.001 ). Sequence 2 had the highest image quality score (4.9) and the lowest CV score (9.2%). In the FF figure, SNR (18.8) and CNR ( 17.8 ± 6.4 ) were the highest, while CV was the lowest (36.7%, 36.1%). In the R2 ∗ figure, sequence 3 had the highest SNR (21.8) and CNR (20.5), but its CV (51.8% and 56.1%) was significantly higher than that of sequence 2. The occurrence of fat-water exchange (FWS) was lowest in sequence 2 and sequence 4 (0, N = 96 ). In conclusion, the fat quantification of IDEAL-IQ was robust to the changes of collection parameters, and section thickness (ST) had a certain effect on maintaining good repeatability of R2 ∗ quantification. The higher the ST was, the better the image quality of FF and R2 ∗ was maintained and stable and the less the occurrence of FWS.

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“…The B-Mode-based technique, hepatic echo-intensity attenuation rate, is as easy to use as HRI [105,106,107]. Attenuation imaging (ATI) assesses the characteristics of US beam attenuation in certain tissues.…”

Section: Attenuation Technologymentioning

confidence: 99%

Conventional ultrasound for diagnosis of hepatic steatosis is better than believed

et al. 2021

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Background Hepatic steatosis is a condition frequently encountered in clinical practice, with potential progression towards fibrosis, cirrhosis, and hepatocellular carcinoma. Detection and staging of hepatic steatosis are of most importance in nonalcoholic fatty liver disease (NAFLD), a disease with a high prevalence of more than 1 billion individuals affected. Ultrasound (US) is one of the most used noninvasive imaging techniques used in the diagnosis of hepatic steatosis. Detection of hepatic steatosis with US relies on several conventional US parameters, which will be described. US is the first-choice imaging in adults at risk for hepatic steatosis. The use of some scoring systems may add additional accuracy especially in assessing the severity of hepatic steatosis. Summary In the presented paper, we discuss screening and risk stratification, ultrasound features for diagnosing hepatic steatosis, B-mode criteria, focal fatty patterns and Doppler features of the hepatic vessels, and the value of the different US signs for the diagnosis of liver steatosis including classifying the severity of steatosis using different US scores. Limitations of conventional B-mode and Doppler features in the evaluation of hepatic steatosis are also discussed, including those in grading and assessing the complications of steatosis, namely fibrosis and nonalcoholic steatohepatitis. Key Messages Ultrasound is the first-line imaging examination for the screening and follow-up of patients with liver steatosis. The use of some scoring systems may add additional accuracy in assessing the severity of steatosis. Conventional B-mode and Doppler ultrasound have limitations in grading and assessing the complications of steatosis.

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Assessment of hepatic fat content in using quantitative ultrasound measurement of hepatic/renal ratio and hepatic echo-intensity attenuation rate

Cited by 5 publications

References 36 publications

Quantification of muscle tone by using shear wave velocity during an anaesthetic induction: a prospective observational study

Quantification of muscle tone by using shear wave velocity during an anaesthetic induction: a prospective observational study

Repeatability and Image Quality of IDEAL-IQ in Human Lumbar Vertebrae for Fat and Iron Quantification across Acquisition Parameters

Conventional ultrasound for diagnosis of hepatic steatosis is better than believed

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