Clinical application of Acoustic Radiation Force Impulse Imaging with Virtual Touch IQ in breast ultrasound: diagnostic performance and reproducibility of a new technique

Kapetas, Panagiotis; Pinker-Domenig, Katja; Woitek, Ramona; Clauser, Paola; Bernathova, Maria; Spick, Claudio; Helbich, Thomas H.; Baltzer, Pascal

doi:10.1177/0284185116641347

Cited by 28 publications

(34 citation statements)

References 25 publications

(51 reference statements)

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“…In the history of elastography, many studies regard subcutaneous fat as a control with malignant or benign nodular. [14] In this study, the skin SWE of abdomen covered fatty layer (>20 mm) gained excellent agreement (0.81–0.96) in intra- and interobserver, confirmed that subcutaneous fat has little impact on skin SWE reproducibility. In physical structure, the thickness of subcutaneous fat above the anterior and lateral tibia shows a graded increasing trend from 1 to 6 mm (Fig.…”

Section: Discussionsupporting

confidence: 67%

Reproducibility analysis on shear wave elastography (SWE)-based quantitative assessment for skin elasticity

Sun¹,

Liang³

et al. 2017

Medicine

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Shear Wave Elastography (SWE) is an objective and non-invasive method widely used to quantify the tissue solidity. However, there are concerns about the accuracy of the skin SWE results due to the low signal-to-noise ratio (SNR) caused by subcutaneous fat, muscle and bone. This article analyzed the reproducibility of the result for skin SWE and therefore evaluated the availability of SME for skin elasticity involved diseases. Thirty volunteers (mean age: 37 ± 12 years) were selected. SWE were taken on the skin of abdomen and the middle tibia in order to assess the impact of fat, muscle and bone on SWE results. Skin in the area of anterior and lateral tibia marked with seven parallel lines, and each line indicated an identical thickness of the subcutaneous fat from 1–7 mm. Intra-class correlation coefficients (ICC) were used to evaluate the intra-observer and inter-observer reproducibility. The solidity of abdominal skin showed soft and small individual differences (12.4 ± 2.7 kPa), whereas high shear moduli (25–48 kPa) were observed in the skin above tibia and tibialis anterior muscle. When the subcutaneous fat was thicker than 3 mm (≥3), we obtained excellent intra-observer reproducibility (ICC range 0.78–0.98) and inter-observer reproducibility (ICC range 0.75–0.98). The thickness of subcutaneous fat could affect the reproducibility of skin SWE. The further study on skin SWE standardization should be taken.

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Section: Discussionsupporting

confidence: 67%

Reproducibility analysis on shear wave elastography (SWE)-based quantitative assessment for skin elasticity

Sun¹,

Liang³

et al. 2017

Medicine

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“…[36] (n = 20) displayed LOA graphically from the mean of three repeated measurements using the MyotonPro device (Myoton, Tallinn, Estonia) in normal muscle belly and tendon. Several studies have calculated LOA in nonmusculoskeletal tissues using variable numbers of repeated measurements including liver [37], thyroid [38] and breast [38,39]-for example, Mulabecirovic et al [37] found no significant difference using five or ten readings when measuring liver stiffness. Using five measurements in the present study decreased the LOA from (−36%, +55%) to (−26%, +35%); however, we would recommend taking at least five measurements if feasible, to further reduce the LOA.…”

Section: Discussionmentioning

confidence: 99%

Inter- and intra-reader reproducibility of shear wave elastography measurements for musculoskeletal soft tissue masses

et al. 2019

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Objective To determine inter-and intra-reader reproducibility of shear wave elastography measurements for musculoskeletal soft tissue masses. Materials and methods In all, 64 patients with musculoskeletal soft tissue masses were scanned by two readers prior to biopsy; each taking five measurements of shear wave velocity (m/s) and stiffness (kPa). A single lesion per patient was scanned in transverse and cranio-caudal planes. Depth measurements (cm) and volume (cm 3) were recorded for each lesion, for each reader. Linear mixed modelling was performed to assess limits of agreement (LOA), inter-and intra-reader repeatability, including analyses for measured depth and volume. Results Of the 64 lesions scanned, 24 (38%) were malignant. Bland-Altman plots demonstrated negligible bias with wide LOA for all measurements. Transverse velocity was the most reliable measure-intraclass correlation (95% CI) = 0.917 (0.886, 1)though reader 1 measures could be between 38% lower and 57% higher than reader 2 [ratio-scale bias (95% LOA) = 0.99 (0.64, 1.55)]. Repeatability coefficients indicated most disagreement resulted from poor within-reader reproducibility. LOA between readers calculated from means of five repeated measurements were narrower-transverse velocity ratio-scale bias (95% LOA) = 1.00 (0.74, 1.35). Depth affected both estimated velocity and repeatability; volume also affected repeatability. Conclusion This study found poor repeatability of measurements with wide LOA due mostly to intra-reader variability. Transverse velocity was the most reliable measure; variability may be affected by lesion depth. At least five measurements should be reported with LOA to assist future comparability between shear wave elastography systems in evaluating soft tissue masses.

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“…In the literature, studies have reported using the VTIQ method of SWE for the evaluation of breast lesions [2,[23][24][25][26][27][28][29]. Ianculescu et al [2] reported the sensitivity and specificity values of the VTIQ method as 80.4% and 73%, respectively, when the cutoff SWV was 3.31 m/s.…”

Section: Discussionmentioning

confidence: 99%

Shear wave versus strain elastography in the differentiation of benign and malignant breast lesions

Gürüf¹,

Öztürk²,

Bayrak³

et al. 2019

Turk J Med Sci

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Background/aim: To evaluate and compare the diagnostic performances of shear wave elastography (SWE) and strain elastography (SE) in the differentiation of benign and malignant breast lesions. Materials and methods:The current study included 87 breast lesions in 84 patients. The Breast Imaging Reporting and Data System (BIRADS) categories were determined with ultrasound features. The maximum shear wave velocity (SWV), mean SWV, maximum SWV to fat SWV ratio, and mean SWV to fat SWV ratio were measured using SWE. The strain ratio (SR) was calculated as the ratio of lesion strain to the adjacent fat strain using SE. Receiver operating characteristic (ROC) curves were constructed to assess and compare the diagnostic performances of each parameter.Results: Forty-five benign and 42 malignant lesions were diagnosed. The sensitivity and specificity of the BIRADS classification was 100% and 35.6%, respectively. Selecting a cutoff SR value of 3.22 led to an 88.1% sensitivity and an 88.4% specificity (AUC: 0.913 [95% CI: 0.854-0.971], P < 0.001). Selecting cutoff maximum SWV value of 3.41 m/s led to an 88.1% sensitivity and an 86.7% specificity (AUC: 0.918 [95% CI: 0.858-0.978], P < 0.001). The diagnostic performance of the maximum SWV, mean SWV, and maximum SWV to fat SWV ratio were similar to the diagnostic performance of the SR (P = 1.00, P = 1.00, P = 0.629, respectively).Conclusion: SE and SWE are both feasible imaging modalities in the differentiation of malignant and benign breast lesions with similar diagnostic performances.

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Clinical application of Acoustic Radiation Force Impulse Imaging with Virtual Touch IQ in breast ultrasound: diagnostic performance and reproducibility of a new technique

Cited by 28 publications

References 25 publications

Reproducibility analysis on shear wave elastography (SWE)-based quantitative assessment for skin elasticity

Reproducibility analysis on shear wave elastography (SWE)-based quantitative assessment for skin elasticity

Inter- and intra-reader reproducibility of shear wave elastography measurements for musculoskeletal soft tissue masses

Shear wave versus strain elastography in the differentiation of benign and malignant breast lesions

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