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Pruijssen JT, Schreuder FHBM, Wilbers J, Kaanders JHAM, de Korte CL, Hansen HHG. Performance evaluation of commercial and non-commercial shear wave elastography implementations for vascular applications. ULTRASONICS 2024; 140:107312. [PMID: 38599075 DOI: 10.1016/j.ultras.2024.107312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/25/2024] [Accepted: 04/01/2024] [Indexed: 04/12/2024]
Abstract
BACKGROUND Shear wave elastography (SWE) is mainly used for stiffness estimation of large, homogeneous tissues, such as the liver and breasts. However, little is known about its accuracy and applicability in thin (∼0.5-2 mm) vessel walls. To identify possible performance differences among vendors, we quantified differences in measured wave velocities obtained by commercial SWE implementations of various vendors over different imaging depths in a vessel-mimicking phantom. For reference, we measured SWE values in the cylindrical inclusions and homogeneous background of a commercial SWE phantom. Additionally, we compared the accuracy between a research implementation and the commercially available clinical SWE on an Aixplorer ultrasound system in phantoms and in vivo in patients. METHODS SWE measurements were performed over varying depths (0-35 mm) using three ultrasound machines with four ultrasound probes in the homogeneous 20 kPa background and cylindrical targets of 10, 40, and 60 kPa of a multi-purpose phantom (CIRS-040GSE) and in the anterior and posterior wall of a homogeneous polyvinyl alcohol vessel-mimicking phantom. These phantom data, along with in vivo SWE data of carotid arteries in 23 patients with a (prior) head and neck neoplasm, were also acquired in the research and clinical mode of the Aixplorer ultrasound machine. Machine-specific estimated phantom stiffness values (CIRS phantom) or wave velocities (vessel phantom) over all depths were visualized, and the relative error to the reference values and inter-frame variability (interquartile range/median) were calculated. Correlations between SWE values and target/vessel wall depth were explored in phantoms and in vivo using Spearman's correlations. Differences in wave velocities between the anterior and posterior arterial wall were assessed with Wilcoxon signed-rank tests. Intra-class correlation coefficients were calculated for a sample of ten patients as a measure of intra- and interobserver reproducibility of SWE analyses in research and clinical mode. RESULTS There was a high variability in obtained SWE values among ultrasound machines, probes, and, in some cases, with depth. Compared to the homogeneous CIRS-background, this variation was more pronounced for the inclusions and the vessel-mimicking phantom. Furthermore, higher stiffnesses were generally underestimated. In the vessel-mimicking phantom, anterior wave velocities were (incorrectly) higher than posterior wave velocities (3.4-5.6 m/s versus 2.9-5.9 m/s, p ≤ 0.005 for 3/4 probes) and remarkably correlated with measurement depth for most machines (Spearman's ρ = -0.873-0.969, p < 0.001 for 3/4 probes). In the Aixplorer's research mode, this difference was smaller (3.3-3.9 m/s versus 3.2-3.6 m/s, p = 0.005) and values did not correlate with measurement depth (Spearman's ρ = 0.039-0.659, p ≥ 0.002). In vivo, wave velocities were higher in the posterior than the anterior vessel wall in research (left p = 0.001, right p < 0.001) but not in clinical mode (left: p = 0.114, right: p = 0.483). Yet, wave velocities correlated with vessel wall depth in clinical (Spearman's ρ = 0.574-0.698, p < 0.001) but not in research mode (Spearman's ρ = -0.080-0.466, p ≥ 0.003). CONCLUSIONS We observed more variation in SWE values among ultrasound machines and probes in tissue with high stiffness and thin-walled geometry than in low stiffness, homogeneous tissue. Together with a depth-correlation in some machines, where carotid arteries have a fixed location, this calls for caution in interpreting SWE results in clinical practice for vascular applications.
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Affiliation(s)
- Judith T Pruijssen
- Medical Ultrasound Imaging Center (MUSIC), Department of Medical Imaging/Radiology, Radboud university medical center, Nijmegen, the Netherlands.
| | - Floris H B M Schreuder
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Joyce Wilbers
- Center of Expertise for Cancer Survivorship, Radboud university medical center, Nijmegen, the Netherlands
| | - Johannes H A M Kaanders
- Department of Radiation Oncology, Radboud university medical center, Nijmegen, the Netherlands
| | - Chris L de Korte
- Medical Ultrasound Imaging Center (MUSIC), Department of Medical Imaging/Radiology, Radboud university medical center, Nijmegen, the Netherlands; Physics of Fluid Group, MESA+ Institute for Nanotechnology, and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, the Netherlands
| | - Hendrik H G Hansen
- Medical Ultrasound Imaging Center (MUSIC), Department of Medical Imaging/Radiology, Radboud university medical center, Nijmegen, the Netherlands
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Lee J, Yoon SK, Cho JH, Kwon HJ, Kim DW, Lee JW. Variability of Transrectal Shear Wave Elastography in a Phantom Model. JOURNAL OF THE KOREAN SOCIETY OF RADIOLOGY 2023; 84:1110-1122. [PMID: 37869125 PMCID: PMC10585080 DOI: 10.3348/jksr.2023.0051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/18/2023] [Accepted: 06/30/2023] [Indexed: 10/24/2023]
Abstract
Purpose This study aimed to assess the variability of transrectal shear wave elastography (SWE) using a designed phantom. Materials and Methods In a phantom, the SWE values were examined by two radiologists using agarose and emulsion silicone of different sizes (1, 2, and 3 cm) and shapes (round, cubic) at three depths (1, 2, and 3 cm), two region of interest (ROI) and locations (central, peripheral) using two ultrasound machines (A, B from different vendors). Variability was evaluated using the coefficient of variation (CV). Results The CVs decreased with increasing phantom size. Significant changes in SWE values included; agarose phantom at 3 cm depth (p < 0.001; machine A), 1 cm depth (p = 0.01; machine B), emulsion silicone at 2 cm depth (p = 0.047, p = 0.020; both machines). The CVs increased with increasing depth. Significant changes in SWE values included; 1 cm agarose (p = 0.037, p = 0.021; both machines) and 2 cm agarose phantom (p = 0.047; machine A). Significant differences in SWE values were observed between the shapes for emulsion silicone phantom (p = 0.032; machines A) and between ROI locations on machine B (p ≤ 0.001). The SWE values differed significantly between the two machines (p < 0.05). The intra-/inter-operator agreements were excellent (intraclass correlation coefficient > 0.9). Conclusion The phantom size, depth, and different machines affected the variability of transrectal SWE.
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Cassinotto C, Anselme S, Jacq T, Irles-Depe M, Belgour A, Hermida M, Guiu B, De Ledinghen V. Inter-platform Variability of Liver Elastography: Pairwise Comparisons of Four Devices. ULTRASOUND IN MEDICINE & BIOLOGY 2022; 48:2258-2266. [PMID: 36050230 DOI: 10.1016/j.ultrasmedbio.2022.06.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/26/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
This study was aimed at determining whether liver stiffness measurements by 2-D shear wave elastography using GE's (2D-SWE-GE) and Canon's (2D-SWE-Canon) newest apparatus and vibration-controlled transient elastography (VCTE) share the same distribution of values compared with Hologic Supersonic Imagine (2D-SWE-SSI). In participants with chronic liver disease recruited in two university centers from August 2020 to February 2021, liver stiffness was measured the same day by the same operator with 2D-SWE-SSI plus one of the following devices: 2D-SWE-GE (n = 314), 2D-SWE-Canon (n = 311), and VCTE-M probe (n = 812). VCTE-M and 2D-SWE-SSI values shared the highest correlation and concordance coefficients (0.933 and 0.920, respectively) and a coefficient of variation below 20%, whatever the range of values. 2D-SWE-GE had the lowest variations, with 2D-SWE-SSI values below 13 kPa. However, both 2D-SWE-GE and 2D-SWE-Canon exhibited a frank underestimation of the high percentiles' 2D-SWE-SSI values with coefficients of variation of -21.7% and -25.8% from 13- to 17-kPa values, and -44.3% and -32.4% from 17-kPa values, respectively. In conclusion, knowledge of the vendor-specific distribution of values is mandatory for interpreting results obtained with different machines. If all four techniques behave closely in low values allowing excluding advanced chronic liver diseases in larger populations, discrepancies are observed in high percentile values.
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Affiliation(s)
- Christophe Cassinotto
- Department of Diagnostic and Interventional Radiology, Saint-Eloi Hospital, University Hospital of Montpellier, Montpellier, France; Institut Desbrest d'Epidémiologie et de Santé Publique (IDESP), UMR UA11 INSERM, Montpellier University, Montpellier, France.
| | - Sophie Anselme
- Department of Diagnostic and Interventional Radiology, Saint-Eloi Hospital, University Hospital of Montpellier, Montpellier, France
| | - Tony Jacq
- Department of Diagnostic and Interventional Radiology, Saint-Eloi Hospital, University Hospital of Montpellier, Montpellier, France
| | - Marie Irles-Depe
- Centre d'Investigation de la Fibrose Hépatique, Haut-Lévêque Hospital, University Hospital of Bordeaux, Pessac, France
| | - Ali Belgour
- Department of Diagnostic and Interventional Radiology, Saint-Eloi Hospital, University Hospital of Montpellier, Montpellier, France
| | - Margaux Hermida
- Department of Diagnostic and Interventional Radiology, Saint-Eloi Hospital, University Hospital of Montpellier, Montpellier, France
| | - Boris Guiu
- Department of Diagnostic and Interventional Radiology, Saint-Eloi Hospital, University Hospital of Montpellier, Montpellier, France; Institut Desbrest d'Epidémiologie et de Santé Publique (IDESP), UMR UA11 INSERM, Montpellier University, Montpellier, France
| | - Victor De Ledinghen
- Centre d'Investigation de la Fibrose Hépatique, Haut-Lévêque Hospital, University Hospital of Bordeaux, Pessac, France
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Zhang J, Zhang L, Guo F, Zhang T. Shear Wave Elastography of the Coracohumeral Ligament With Frozen Shoulder in Different Stages. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2022; 41:2527-2534. [PMID: 35005780 DOI: 10.1002/jum.15942] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
OBJECTIVES To study the shear wave elastography (SWE) of the coracohumeral ligament (CHL) in different stages of frozen shoulder and to analyze its correlation with the visual analogue scale (VAS) score and shoulder range of motion (ROM). METHODS Sixty-four patients with frozen shoulder were divided into three stages: stage I (freezing phase), stage II (frozen phase), and stage III (thawing phase). The SWE of the CHL of the affected and healthy sides was measured and compared in the different stages. The VAS score and ROM of the affected side were evaluated, and their correlation with the SWE of the CHL was analyzed in the different stages. RESULTS In stage I frozen shoulder, the SWE of the CHL on the affected side was lower than that on the healthy side, while in stages II and III, the SWE on the affected side was higher (P = .001 for all). The SWE of the CHL of the affected side was different across the three stages; the SWE in stages II and III higher than that in stage I (P < .01), while the difference between stages II and III was not significant (P > .05). The SWE of the CHL of the affected side was negatively correlated with the VAS score but not with forward flexion (Ff), external rotation (Er) or internal rotation (Ir) in stage I; in stages II and III, it was positively correlated with the VAS score and negatively correlated with Ff, Er, and Ir. CONCLUSIONS The CHL stiffness of the affected side and its correlation with the shoulder VAS score and ROM are different for different stages of frozen shoulder.
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Affiliation(s)
- Jingfeng Zhang
- Department of Ultrasound, Baoji High-Tech Hospital, Baoji, China
| | - Lei Zhang
- Department of Radiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Department of Radiology, Baoji High-Tech Hospital, Baoji, China
| | - Fanglan Guo
- Department of Ultrasound, Baoji High-Tech Hospital, Baoji, China
| | - Tian Zhang
- Department of Ultrasound, Baoji High-Tech Hospital, Baoji, China
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Xiang H, Ling W, Ma L, Yang L, Lin T, Luo Y. Shear wave elastography using sound touch elastography and supersonic shear imaging for liver measurements: a comparative study. Quant Imaging Med Surg 2022; 12:2855-2865. [PMID: 35502377 PMCID: PMC9014163 DOI: 10.21037/qims-21-863] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 01/19/2022] [Indexed: 08/26/2023]
Abstract
BACKGROUND Measurements of liver stiffness obtained with 2-dimensional shear wave elastography (2D-SWE) have been widely used to clinically assess liver fibrosis. However, differences between different 2D-SWE systems can lead to confusion when interpreting measurements. This study investigated the variability between a recently released sound touch elastography (STE) system and a supersonic shear imaging (SSI) system and assessed the degree of intersystem discrepancy using the different liver stiffness value (LSV) thresholds recommended by the Society of Radiologists in Ultrasound (SRU) for assessing liver fibrosis. METHODS A total of 4,152 patients who had undergone STE and SSI on the same day were enrolled in this retrospective study. First, intrasystem agreement for STE and SSI was assessed. Then, intraclass correlation coefficients (ICCs) and the Bland-Altman method were used to assess intersystem variability for all cases, classified according to the thresholds recommended by the SRU. The effects of age, gender, and body-mass index (BMI) were evaluated using multivariate linear regression analysis and attributive intervals were computed for STE and SSI at each of the different thresholds. RESULTS The ICCs for STE and SSI intrasystem agreement were 0.94 [95% confidence interval (CI): 0.937-0.943; P<0.001] and 0.984 (95% CI: 0.984-0.985; P<0.001), respectively. The 95% limit of agreement (LOA) for all cases ranged from -6.96 to 7.44 kPa. The 95% LOA increased as the threshold values rose, and intersystem variability was obvious, even at the smallest threshold (the 95% LOA at values ≤5 kPa was -0.85 to 2.08 kPa, while that at values >17 kPa was -20.81 to 14.71 kPa). The adjusted R2 for age, gender, and BMI was only 0.018 (all P value <0.05). CONCLUSIONS There was clear variability between STE and SSI, in contrast with some previous studies with small sample sizes, and consistent with others. Intersystem variability increased with the elevation of the LSV thresholds recommended by the SRU. Gender and BMI had little effect on intersystem variability. Future research could compare STE and SSI in different liver diseases, assessing the feasibility of the SRU-recommended thresholds in proven pathologies and evaluating the test-retest repeatability.
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Affiliation(s)
- Hongjin Xiang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Wenwu Ling
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Lin Ma
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Lulu Yang
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Tang Lin
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
| | - Yan Luo
- Department of Ultrasound, West China Hospital of Sichuan University, Chengdu, China
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Intra-System Reliability Assessment of 2-Dimensional Shear Wave Elastography. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11072992] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The availability of 2-Dimensional Shear Wave Elastography (2D-SWE) technology on modern medical ultrasound systems is becoming increasingly common. The technology is now being used to investigate a range of soft tissues and related pathological conditions. This work investigated the reliability of a single commercial 2D-SWE system using a tissue-mimicking elastography phantom to understand the major causes of intra-system variability. Sources of shear wave velocity (SWV) measurement variability relates to imaging depth, target stiffness, sampling technique and the operator. Higher SWV measurement variability was evident with increasing depth and stiffness of the phantom targets. The influence of the operator was minimal, and variations in sampling technique had little impact on the SWV.
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Carvalho CP, Costa-Júnior JFS, Rangel CDS, Pereira WCDA. Measurement of Shear Wave Speed and Normalized Elastic Modulus of Human Skin with and without Dermal Striae Using Shear Wave Elastography. ULTRASOUND IN MEDICINE & BIOLOGY 2021; 47:454-470. [PMID: 33349514 DOI: 10.1016/j.ultrasmedbio.2020.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 11/09/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
Supersonic shear imaging is a non-invasive technique used for detecting physiologic and pathologic changes in biological tissues. In this study, supersonic shear imaging was used to measure and compare shear wave speed (cs) and normalized elastic modulus (EN) values of skin with and skin without dermal striae (DS) in vivo. The values were measured at angles of 0°, 45°, 90° and 315° to the skin tension lines. In the presence of DS, a statistically significant reduction in the elasticity dermis was observed (p value <0.05). The mean values of cs and EN for STLs were higher in normal skin at 45° (4.26 ± 1.05 m/s and 56.23 ± 25.31 kPa) and 90° (4.26 ± 0.55 m/s and 54.91 ± 14.22 kPa), and those for DS were also higher at 45° (3.59 ± 0.72 m/s and 42.71 ± 27.97 kPa) and 90° (3.52 ± 0.65 m/s and 42.34 ± 31.68 kPa) than at other angles. Supersonic shear imaging was found to be a promising technique in the study of skin with DS. The data obtained in this study are expected to be relevant for future studies using shear wave elastography for the aforementioned purpose.
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Affiliation(s)
- Cátia Pinto Carvalho
- Biomedical Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro-RJ, Brazil.
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Kim K, Lee J, So J, Jang YS, Jung M, Kang K, Choi M, Yoon J. Feasibility and Reliability of Two-Dimensional Shear-Wave Elastography of the Liver of Clinically Healthy Cats. Front Vet Sci 2020; 7:614750. [PMID: 33426033 PMCID: PMC7785986 DOI: 10.3389/fvets.2020.614750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/20/2020] [Indexed: 12/26/2022] Open
Abstract
Given the broad overlap of normal and abnormal liver tissue in the subjective evaluation of the liver in conventional B-mode ultrasonography, there is a need for a non-invasive and quantitative method for the diagnosis of liver disease. Novel two-dimensional shear-wave elastography (2-D SWE) can measure tissue stiffness by propagation of the shear wave induced using acoustic radiation force impulse in real time. To the best of our knowledge, two-dimensional shear-wave measurement of the liver in cats has not been reported to date. This study assessed the feasibility, reliability, normal values, and related influencing factors of 2-D SWE for assessment of the feline liver without anesthesia and breath-holding. Two-dimensional shear-wave ultrasonography was performed by two evaluators at the right and left sides of the liver. Twenty-nine client-owned clinically healthy adult cats were included. The means and standard deviations for the shear-wave speed and stiffness in the right liver were 1.52 ± 0.13 m/s and 6.94 ± 1.26 kPa, respectively, and those for the left liver were 1.61 ± 0.15 m/s and 7.90 ± 1.47 kPa, respectively. Shear-wave speed (P = 0.005) and stiffness (P = 0.002) were significantly lower in the right liver when compared to the left. The intraclass correlation value for liver stiffness was 0.835 and 0.901 for the right and left liver, respectively, indicating high interobserver agreement. Age, weight, body condition score (BCS), gabapentin administration, and measurement depths were not significantly correlated with liver stiffness or elastography measurements (P > 0.05). Our findings suggest that 2-D SWE measurements of the liver are not influenced significantly by age, weight, or BCS and can be reliably performed without anesthesia and breath-holding in cats. The values determined here can help form the basis for reference elastography values for evaluation of the feline liver.
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Affiliation(s)
- Kyeonga Kim
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Jieun Lee
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Jaebeom So
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Yong-Seok Jang
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Mingyu Jung
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Kyuyong Kang
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Mincheol Choi
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
| | - Junghee Yoon
- College of Veterinary Medicine and the Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea
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Yang L, Li J, Ma L, Xiang H, He D, Lu C, Tang L, Luo Y, Chen S. Noninvasive assessment of liver fibrosis in chronic hepatitis B carriers with sound touch elastography: study of surgical pathology specimens. Expert Rev Med Devices 2020; 17:845-853. [PMID: 32686517 DOI: 10.1080/17434440.2020.1798226] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
PURPOSE To evaluate the diagnostic performance of sound touch elastography (STE) for staging liver fibrosis in chronic hepatitis B (CHB) patients using pathological stage of surgical specimens as the reference standard. METHOD 239 CHB patients were included. Liver stiffness measurements (LSMs) on STE and Supersonic shear imaging (SSI), gamma glutamyl transferase-to-platelet ratio (GPR), aspartate aminotransferase-to-platelet ratio index (APRI) and four-factor Fibrosis-4 (FIB-4) index were obtained. Areas under the receiver operating characteristic (ROC) curves (AUCs) for the diagnosis of fibrosis stage were calculated and compared. RESULTS The LSMs obtained by STE and SSI significantly correlated with the fibrosis stages (r = 0.757; r = 0.758, respectively, both p < 0.001). No significant differences in AUCs were observed between STE and SSI in identifying fibrosis ≥stage 1 (0.92 vs. 0.94), ≥stage 2 (0.89 vs. 0.91), ≥stage 3 (0.90 vs. 0.91) or stage 4 (0.92 vs. 0.91). Both STE and SSI had significantly higher AUCs in identifying each fibrosis stage than the GPR (0.68, 0.77, 0.76 and 0.79), APRI (0.53, 0.66, 0.74 and 0.69) and FIB-4 (0.61, 0.77, 0.79 and 0.74). CONCLUSIONS STE is an efficient tool for assessing liver fibrosis in CHB patients, with performance comparable to that of SSI and superior to that of biomarkers.
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Affiliation(s)
- Lulu Yang
- Department of Ultrasound, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Jiawu Li
- Department of Ultrasound, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Lin Ma
- Department of Ultrasound, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Hongjin Xiang
- Department of Ultrasound, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Du He
- Department of Pathology, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Changli Lu
- Department of Pathology, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Lin Tang
- Department of Ultrasound, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Yan Luo
- Department of Ultrasound, West China Hospital of Sichuan University , Chengdu, Sichuan, P.R. China
| | - Shigao Chen
- Department of Radiology, Mayo Clinic , Rochester, MN, USA
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Alrashed AI, Alfuraih AM. Reproducibility of shear wave elastography among operators, machines, and probes in an elasticity phantom. Ultrasonography 2020; 40:158-166. [PMID: 32660213 PMCID: PMC7758105 DOI: 10.14366/usg.20011] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Accepted: 05/09/2020] [Indexed: 12/28/2022] Open
Abstract
PURPOSE This study was aimed to investigate the reproducibility of shear wave elastography (SWE) among operators, machines, and probes in a phantom, and to evaluate the effect of depth of the embedded inclusions and the accuracy of the measurements. METHODS In vitro stiffness measurements were made of six inclusions (10, 40, and 60 kPa) embedded at two depths (1.5 cm and 5 cm) in an elastography phantom. Measurements were obtained by two sonographers using two ultrasound machines (the SuperSonic Imagine Aixplorer with the XC6-1, SL10-2 and SL18-5 probes, and the General Electric LOGIQ E9 with the 9L-D probe). Variability was evaluated using the coefficient of variation. Reproducibility was calculated using intraclass correlation coefficients (ICCs). RESULTS For shallow inclusions, low variability was observed between operators (range, 0.9% to 5.4%). However, the variability increased significantly for deep inclusions (range, 2.4% to 80.8%). The measurement difference between the operators was 1%-15% for superficial inclusions and 3%-43% for deep inclusions. Inter-operator reproducibility was almost perfect (ICC>0.90). The measurement difference between machines was 0%-15% for superficial inclusions and 38.6%-82.9% for deep inclusions. For superficial inclusions, the reproducibility among the three probes was excellent (ICC>0.97). The mean stiffness values of the 10 kPa inclusion were overestimated by 16%, while those of the 40 kPa and 60 kPa inclusions were underestimated by 42% and 48%, respectively. CONCLUSION Phantom SWE measurements were only reproducible among operators, machines, and probes at superficial depths. SWE measurements acquired in deep regions should not be used interchangeably among operators, machines, or probes.
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Affiliation(s)
- Abdulaziz Ibrahim Alrashed
- Radiodiagnostics and Medical Imaging Department, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Abdulrahman M Alfuraih
- Radiology and Medical Imaging Department, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Kharj, Saudi Arabia
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Lee JH, Lee SM, Yoon JH, Kim MJ, Ha HI, Park SJ, Kim ES, Lee K, Lee JM. Impact of respiratory motion on liver stiffness measurements according to different shear wave elastography techniques and region of interest methods: a phantom study. Ultrasonography 2020; 40:103-114. [PMID: 32447879 PMCID: PMC7758106 DOI: 10.14366/usg.19079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 04/12/2020] [Indexed: 12/31/2022] Open
Abstract
Purpose This study quantified the impact of respiratory motion on liver stiffness measurements according to different shear wave elastography (SWE) techniques and region of interest (ROI) methods, using liver fibrosis phantoms. Methods Three operators measured stiffness values in four phantoms with different stiffness on a moving platform with two SWE techniques (point-SWE [pSWE] and 2-dimensional SWE [2D-SWE]), three types of motion (static mode and moving mode at low and high speeds), and four ROI methods in 2D-SWE (circle, point, box, and multiple). The circular ROI method was used to compare the two SWE techniques. The occurrence of technical failure and unreliable measurements, stiffness values, and measurement time were evaluated. Results Technical failure was observed only in moving mode for pSWE and 2D-SWE (n=1 for both). Unreliable measurements were also only observed in moving mode and were significantly less common in 2D-SWE (n=1) than in pSWE (n=12) (P<0.001). No statistically significant differences in the technical failure rate or stiffness values were noted between the static and moving modes for both SWE techniques. The technical failure and unreliable measurement rates were not significantly different among the ROI methods for 2D-SWE. Stiffness values did not differ significantly according to the ROI method used in any moving mode. However, the multiple ROI method had significantly shorter measurement times than the circular ROI method for all moving modes. Conclusion 2D-SWE may be preferable for evaluating liver fibrosis in patients with poor breath-hold. Furthermore, 2D-SWE with multiple ROIs enables rapid measurements, without affecting liver stiffness values.
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Affiliation(s)
- Jee Hyeon Lee
- Department of Radiology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Sang Min Lee
- Department of Radiology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Jeong Hee Yoon
- Department of Radiology, Seoul National University Hospital, Seoul, Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - Min-Jeong Kim
- Department of Radiology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Hong Il Ha
- Department of Radiology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Sung-Joon Park
- Department of Radiology, Korea University Ansan Hospital, Ansan, Korea
| | - Eun Soo Kim
- Department of Radiology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Kwanseop Lee
- Department of Radiology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Jeong Min Lee
- Department of Radiology, Seoul National University Hospital, Seoul, Korea.,Department of Radiology, Seoul National University College of Medicine, Seoul, Korea.,Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea
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