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- 저자 : Size Wu (검색결과 3 건)
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Measurement of elasticity of normal placenta using the Virtual Touch quantification technique
Size Wu,Ruixia Nan,Yueping Li,Xiaojing Cui,Xian Liang,Yanan Zhao 대한초음파의학회 2016 ULTRASONOGRAPHY Vol.35 No.3
Purpose: The aim of this study was to measure the elasticity of normal placentas using the VirtualTouch quantification (VTQ) technique. Methods: This study was approved by the Institutional Ethics Committee. Fifty randomly selected,healthy pregnant women in their second trimester and 50 randomly selected, healthy pregnantwomen in their third trimester with a single fetus were included, and their placentas underwentVTQ through shear wave velocity (SWV) measurements. The measurements were performed atdifferent locations to sample different areas of the placenta. Measurements were performed 3-4times in each location, the mean shear wave velocities were calculated without the highest andlowest values of measurements in each region, and the results were compared. Results: The SWV of the placenta was 0.983±0.260 m/sec, and the minimal and maximal speedwas 0.63 m/sec and 1.84 m/sec, respectively. There was no significant difference between thesecond and third trimester of VTQ of the placenta in terms of SWV (0.978±0.255 m/sec vs. 0.987±0.266 m/sec, P=0.711). The maternal age between second and third trimester was27.9±4.3 years and 29.2±4.4 years, respectively; there was no significant difference betweenthem (P=0.159). Conclusion: The results of this study show that the SWV of normal placenta tissue is 0.983±0.260m/sec, it has little variation between the second and third trimesters, and the VTQ technique maypotentially play an additional role in placenta evaluation.
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Size Wu,Rong Tu,Xian Liang 대한초음파의학회 2019 ULTRASONOGRAPHY Vol.38 No.4
Purpose: This study was conducted to investigate whether the presence of patchy echogenicity in the liver of patients with chronic hepatitis B (CHB) is predictive of liver stiffness. Methods: A total of 200 CHB patients with and without patchy echogenicity of the liver were assigned to two groups, with 100 patients in each group, and 32 of them underwent liver biopsy. Additionally, 80 healthy subjects, 100 inactive hepatitis B virus (HBV) carriers, and 100 patients with decompensated hepatic cirrhosis were assigned to the control groups. Laboratory tests and clinical data were collected, and shear wave velocity (SWV) of the liver was measured for all 480 subjects. Results: The median SWV in patients with a normal liver, inactive HBV carriers, CHB patients with and without patchy echogenicity, and decompensated hepatic cirrhosis were 1.07 m/ sec, 1.08 m/sec, 1.16 m/sec, 1.16 m/sec, and 2.02 m/sec, respectively; there was no significant difference in SWV values between CHB patients with patchy echogenicity and those without patchy echogenicity. Furthermore, among CHB patients with and without patchy echogenicity, no significant difference in SWV was found according to fibrosis stage. Conclusion: The presence of patchy echogenicity of the liver does not indicate a higher degree of liver stiffness.
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Size Wu,Rong Tu,Ruixia Nan,Guangqing Liu,Xiaojing Cui,Xian Liang 대한초음파의학회 2016 ULTRASONOGRAPHY Vol.35 No.1
Purpose: The aim of this study was to investigate the influence of variations in fatty liver on the ultrasonographic detection of focal liver lesions. Methods: A total of 229 patients with varying degrees of fatty liver and focal liver lesions and 200 patients with focal liver lesions but no fatty liver were randomly selected for inclusion in groups I and II, respectively. Findings of focal liver lesions identified on computed tomography were taken as the reference, and findings on ultrasonography were compared with them. Results: The number of focal liver lesions in groups I and II were 501 and 413, respectively. The ultrasonographic detection rates of focal liver lesions in groups I and II were 86.8% (435/501) and 94.2% (389/413), respectively. Comparison of the detection of the focal lesions between patients with and without fatty liver or different grades of fatty liver were as follows: mild fatty liver (162/177) vs. liver without fat infiltration (389/413) (P=0.277); mild fatty liver (162/177) vs. moderate fatty liver (190/212) (P=0.604); mild fatty liver (162/177) vs. severe fatty liver (83/112) (P<0.001); moderate fatty liver (190/212) vs. liver without fat infiltration (389/413) (P=0.051); moderate fatty liver (190/212) vs. severe fatty liver (83/112) (P<0.001); severe fatty liver (83/112) vs. liver without fat infiltration (389/413) (P<0.001); and fatty liver (435/501) vs. liver without fat infiltration (389/413) (P<0.001). Conclusion: Mild and moderate fatty liver are not significantly associated with the visualization of the lesion, while severe fatty liver usually impairs the detection of focal lesions in the liver. If a patient with severe fatty liver is suspected to have a liver tumor, ultrasonography should only be chosen cautiously in case of a missed diagnosis.
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