共查询到20条相似文献,搜索用时 15 毫秒
1.
《Ultrasound in medicine & biology》2019,45(9):2328-2337
The aim of the study was to analyze the diagnostic performance of shear wave elastography (SWE) in differentiating between malignant and benign solid renal parenchymal masses ≤4 cm, compared with conventional ultrasound. A total of 20 healthy volunteers and 117 patients had been included in this study. Conventional ultrasound and SWE were performed in all volunteers and patients. The elasticity of healthy cortex and the elastic parameters of tumors such as mean elasticity (Emean), minimum elasticity (Emin), maximum elasticity (Emax), standard deviation and elasticity ratio of the lesion to surrounding cortex (Eratio) were measured on SWE images. Diagnostic performance of SWE was compared with that of conventional ultrasound. The cortical elasticity values of healthy right and left kidneys were 4.7 ± 1.7 and 4.5 ± 1.5 kPa, respectively. Of the 117 renal tumors, 68 were renal cell carcinomas (RCCs) and 49 were benign. Emean, Emin and Eratio were significantly lower in RCCs compared with benign lesions: Emean 7.2 ± 2.5 kPa versus 10.0 ± 2.4 kPa, Emin 2.5 ± 2.4 kPa versus 5.6 ± 2.3 kPa, Eratio 1.6 ± 0.5 versus 2.2 ± 0.6 (all p values < 0.001). The cutoff values of 9.15 kPa for Emean, 3.55 kPa for Emin and 1.99 for Eratio had the highest areas under the receiver operating characteristics curve (0.801 for Emean, 0.832 for Emin and 0.806 for Eratio). Combining Emean, Emin and Eratio with conventional ultrasound improved the specificity for predicting RCCs to 87.8%, but the sensitivity was not increased. 相似文献
2.
Lei Zhang Jinfeng Xu Huaiyu Wu Weiyu Liang Xiuqin Ye Hongtian Tian Fajin Dong 《Ultrasound in medicine & biology》2019,45(3):710-719
The aim of the study described here was to screen breast lesions using either or both shear modulus (G) and its 1-mm shell (S) in sound touch elastography through a retrospective study of 209 consecutive women with breast lesions. The ability of G and S data to differentiate between malignant and benign lesions was evaluated using the receiver operating characteristic (ROC) curve. The optimal cutoff point, sensitivity, specificity, positive likelihood ratio (LR+) and negative likelihood ratio (LR–) were calculated. Then, the parameters were pooled to determine the area under the summary receiver operating curve (AUSROC). The pooled sensitivity (PSen), pooled specificity (PSpe), pooled LR+ (PLR+), pooled LR– (PLR–) and diagnostic score (DS) were calculated. Pathologic examination results were used as the reference. In total, 209 patients with 155 benign and 54 malignant lesions were enrolled. For Gmax, Gmean and Gsd, the cutoff values were 35.15 kPa (p?=?0.0001), 10.18 kPa (p?=?0.0001) and 5.18 kPa (p?=?0.0001), respectively. For Smax, Smean and Ssd, the cutoff values were 40.94 kPa (p?=?0.001), 13.12 kPa (p?=?0.0001) and 7.97 kPa (p?=?0.0001), respectively. There were no significant differences in Gmin and Smin between benign and malignant lesions. For the pooled six parameters, the PSen, PSpe, PLR+, PLR–, DS and AUSROC were 86% (95% confidence interval: 82%–89%), 82% (80%–85%), 4.90 (4.24–5.68), 0.17 (0.13–0.22), 3.36 (3.00–3.72) and 91% (88–93%), respectively. The G and S parameters of sound touch elastography could provide valuable data for the evaluation of breast lesions. Additionally, use of multiple parameters or combined use of the six parameters may be more effective in the evaluation of breast lesions. 相似文献
3.
Tingting Li Man Lu Yuan Li Juan Li Ziyue Hu Xu Li Xueqing Cheng Jingzhen Jiang Bo Tan 《Ultrasound in medicine & biology》2019,45(1):85-92
We evaluate the value of shear wave elastography (SWE) in diagnosing benign and malignant rectal lesions. A total of 96 lesions were reviewed in this study; endorectal ultrasound (ERUS) and SWE examinations were performed before surgery in all cases. Elasticity parameters including mean elastographic index (Emean), maximum elastographic index (Emax) and minimum elastographic index (Emin) were analyzed. Correlations between elastographic parameters and histopathological results were studied. Inter-observer and intra-observer agreement was analyzed. Of the 96 rectal lesions, 72 were malignant and 24 were benign. Compared with ERUS, ERUS?+?SWE had higher sensitivity (93.0% vs. 88.9%), specificity (83.3% vs. 79.2%), positive predictive value (94.4% vs. 92.7%), negative predictive value (80.0% vs. 70.4%) and overall accuracy (90.6% vs. 86.4%). In receiver operating characteristic curve analysis, Emean and Emax had larger areas under the curve: 0.92 and 0.91, respectively. The optimal cutoff value was 61.3 kPa for Emean (sensitivity?=?88.9%, specificity?=?87.5%) and 63.4 kPa for Emax (sensitivity?=?94.4%, specificity?=?83.3%). We obtained κ values of 0.83 (95% confidence interval [CI]: 0.72–0.95) for ERUS and 0.90 (95% CI: 0.81–0.99) for ERUS?+?SWE of differential diagnosis in two observers. The intra-class correlation coefficients for intra-observer variability of stiffness (Emean) in malignant lesions, benign lesions, surrounding normal rectal wall in malignant lesions and surrounding normal rectal wall in benign lesions were 0.91 (95% CI: 0.86–0.94), 0.94 (95% CI: 0.88–0.97), 0.92 (95% CI: 0.88–0.95) and 0.89 (95% CI: 0.77–0.95), respectively. SWE is a promising tool that yields valuable quantitative data additional to that provided by ERUS examination in rectal lesions. The cutoff value 61.3 kPa for Emean may serve as a complementary tool in diagnosis of rectal lesions. 相似文献
4.
目的 比较实时剪切波弹性成像(SWE)技术探讨调整圆形Q-Box法和手动描绘Q-Box法鉴别诊断乳腺良恶性病变的价值。方法 选取经SWE检查并经病理证实的乳腺肿物患者133例,共152个病灶,其中良性病灶115个,恶性病灶37个。分别采用调整圆形Q-Box法和手动描绘Q-Box法选取ROI,测量弹性模量平均值(Emean)、弹性最大值(Emax)和弹性模量离散度值(SD),并进行统计学分析。结果 两种方法测量恶性病灶的Emean、Emax、SD均高于良性病灶(P均<0.05)。两种方法测量所有病灶Emean、Emax、SD的差异均无统计学意义(P均>0.05)。两种方法测量Emean、Emax、SD的AUC差异均无统计学意义(P均>0.05)。调整圆形Q-Box法测量Emean的AUC较SD和Emax的AUC小(P均<0.05),手动描绘Q-Box法测量Emean的AUC较SD的AUC小(P<0.05),余相同测量方法测量不同弹性模量的AUC两两比较,差异均无统计学意义(P均>0.05)。结论 调整圆形Q-Box法鉴别诊断乳腺良恶性病变的诊断效能与手动描绘Q-Box法相似,Emax与SD诊断效能相似。 相似文献
5.
《Ultrasound in medicine & biology》2020,46(4):981-991
The objective of this study was to evaluate the inter-operator reproducibility of strain elastography (SE) and shear wave elastography (SWE) in three groups: all lesions, benign lesions and malignant lesions. Ninety-one lesions from ninety-one women were examined by SE and SWE from January 2017 to December 2017 by two radiologists. The reproducibility of elastic score, SE strain ratio and SWE Young's modulus between operators was prospectively evaluated. There was good agreement on elasticity score, with κ values of 0.711, 0.640 and 0.766. The intra-class correlation coefficients of the strain ratio, mean elastic modulus (Emean), maximum elastic modulus (Emax) and elastic modulus standard deviation (Esd) ranged from 0.723–0.876, which indicated good and excellent agreement. We concluded that both SE and SWE had good reproducibility among different operators using the same probe in the same ultrasound instrument. Strain elasticity score was more consistent among operators in malignant breast tumors. There was better agreement on strain elastic ratio and shear wave elasticity among operators in benign breast lesions. 相似文献
6.
《Ultrasound in medicine & biology》2019,45(8):1918-1923
The purpose of this study was to quantify the stiffness of hypertrophic scars using acoustic radiation force impulse ultrasound elastography. Sixteen pediatric patients with hypertrophic scars resulting from burn injuries participated in this study (mean age: 5.13, standard deviation: 3.20). Values for the elastic modulus (E) of scar and control sites were obtained. Scarred areas were found to be almost four times stiffer than control sites (scar Emean = 39.29 kPa compared with control Emean = 10.19 kPa) (p = 0.0004). Correlations between scar stiffness and clinician-reported subjective scar scale scores were not observed (rs = 0.30, p = 0.27 and rs = 0.25, p = 0.35 respectively). We found that acoustic radiation force impulse imaging can discriminate between hypertrophic scars and normal skin and should be considered a potentially valuable tool in the armamentarium of objective scar measures. Future research should focus on evaluating the technology's ability to detect scar change over time in order to determine responsiveness to treatment. 相似文献
7.
Yuanjiao Tang Feng Yan Yujia Yang Xi Xiang Liyun Wang Lingyan Zhang Li Qiu 《Ultrasound in medicine & biology》2017,43(5):884-892
Our aim was to analyze the diagnostic performance of shear wave elastography (SWE) in the diagnosis of gouty arthritis (GA) and non-gouty arthritis (non-GA). Thirty-nine patients in the GA group and 55 patients in the non-GA group were included in the study. Based on the echo intensity of the joint lesions, the GA group was subdivided into hypo-echoic GA, slightly hyper-echoic GA and hyper-echoic GA subgroups. Quantitative SWE features were evaluated and receiver operating characteristic analysis was performed. On the basis of the study, the elastic modulus (Emax), mean elastic modulus (Emean), minimum elastic modulus (Emin) and elastic modulus standard deviation (ESD) were significantly higher in the GA group than in the non-GA group and were highest in the hyper-echoic GA subgroup (p < 0.01 for all). Emin, Emean and Emax were significantly higher in the hyper-echoic GA subgroup than in the hypo-echoic GA subgroup and non-GA group (p < 0.001 for all), and ESD was significantly higher in the hyper-echoic GA subgroup than in the non-GA group (p = 0.001). Emin, Emean, Emax and ESD were higher in the hypo-echoic GA subgroup than in the non-GA group, and the differences were significant (p < 0.001 for all). Based on the hypo-echoic GA subgroup and non-GA group, areas under the receiver operating characteristic curves for the prediction of GA were 0.749 for Emin, 0.877 for Emean, 0.896 for Emax and 0.886 for ESD, with optimal cutoff values of 29.40 kPa for Emin, 45.35 kPa for Emean, 67.54 kPa for Emax and 7.85 kPa for ESD. Our results indicate that SWE can differentially diagnose GA and non-GA, especially when the ultrasound manifestations are not typical. 相似文献
8.
《Ultrasound in medicine & biology》2021,47(9):2532-2542
Our aim was to investigate the correlations between the findings of two-dimensional shear-wave elastography (2D-SWE) and the histopathologic results of microcalcifications (MCs) visualized using ultrasonography (USG). Fifty people with suspicious MCs without accompanying mass were evaluated. They underwent USG and 2D-SWE before USG-guided tru-cut biopsy. SWE values and histopathologic features were compared statistically. The variables between groups were analyzed using the Mann–Whitney U test. Receiver operating characteristic analysis was performed and cut-off values determined to discriminate malignancy, invasiveness and high grade. Pathology confirmed 27 malignant lesions (18 invasive ductal carcinomas, one invasive lobular and eight ductal carcinomas in situ) and 23 benign ones. There was a statistically significant difference between the SWE values of malignant and benign MCs (p < 0.001). The diagnostic performance of SWE for malignancy, invasiveness and high grade were as follows, repectively: sensitivity (93%, 83%, 88%), specificity (91%, 88%, 53%), positive predictive value (93%, 94%, 44%), negative predictive value (91%, 70%, 90%) and area under the curve (0.952, 0.885, 0.776). Cut-off values were determined as 57 kPa for malignancy, 124 kPa for invasiveness and 124.5 kPa for high grade. In conclusion, SWE is a useful method in clinical practice for characterizing MCs that can be visualized with USG. 相似文献
9.
Juanjuan Gu Eric C. Polley Judy C. Boughey Robert T. Fazzio Mostafa Fatemi Azra Alizad 《Ultrasound in medicine & biology》2021,47(8):2193-2201
This purpose of this study is to correlate a new shear-wave elastography (SWE) parameter, mass characteristic frequency (fmass) and other elasticity measure with the prognostic histological factors and immunohistochemical (IHC) biomarkers for the evaluation of heterogeneous breast carcinomas. The new parameter, fmass, first introduced in this paper, is defined as the ratio of the averaged minimum shear wave speed taken spatially within regions of interest to the largest mass dimension. 264 biopsy-proven breast cancerous masses were included in this study. Mean (Emean), maximum (Emax), minimum (Emin) shear wave elasticity and standard deviation (Esd) of shear wave elasticity were found significantly correlated with tumor size, axillary lymph node (ALN) status, histological subtypes and IHC subtypes. The areas under the curve for the ALN prediction are 0.73 (95% confidence interval [CI]: 0.67–0.80) and 0.75 (95% CI: 0.69–0.81) for the combination of Emean with Breast Imaging Reporting and Data System (BI-RADS) score and Emax with BI-RADS score, respectively. fmass was significantly correlated with the presence of calcifications, ALN status, histological grade, the expressions of IHC biomarkers and IHC subtypes. To conclude, poor prognostic factors were associated with high shear wave elasticity values and low mass characteristic frequency value. Therefore, SWE provides valuable information that may help with prediction of breast cancer invasiveness. 相似文献
10.
实时剪切波弹性成像技术鉴别诊断肺良恶性周围型肿块 总被引:1,自引:1,他引:0
目的 探讨实时剪切波弹性成像(SWE)技术鉴别诊断肺部良恶性周围型肿块的价值。方法 采用SWE技术测量112例周围型肺部肿块患者的杨氏模量值,分析良恶性组及恶性病变不同病理类型亚组间的杨氏模量最大值(Emax)和平均值(Emean)的差异。以病理结果为金标准,绘制ROC曲线获得其鉴别诊断良恶性肿块的效能。结果 周围型肺部肿块良恶性组间Emax及Emean差异均有统计学意义(t=-2.78、-3.28,P均<0.01),恶性组不同病理类型亚组间Emax及Emean差异均无统计学意义(P均>0.05)。Emax和Emean鉴别诊断肺良恶性肿块的阈值分别为10.35 kPa和5.85 kPa,AUC分别为0.74(P=0.003)、0.81(P=0.001),敏感度、特异度、阳性预测值、阴性预测值分别为74.36%、72.22%、85.29%、57.52%和81.58%、80.78%、89.57%和67.67%。结论 SWE技术可用于评估周围型肺部肿块的弹性特征,为鉴别肺部良恶性周围型肿块提供了重要的影像学手段。 相似文献
11.
《Ultrasound in medicine & biology》2015,41(10):2594-2604
Qualitative and quantitative shear wave elastography (SWE) criteria were assessed to differentiate between malignant and benign breast lesions. This prospective study included 83 lesions. SWE features measured included maximal stiffness values inside the lesion (Elesion) and in the peri-lesion area (Eperilesion) and ratio values (Rlesion and Rperilesion) according to the formula Elesion or Eperilesion/Efat, with Efat corresponding to normal fatty tissue. We compared ultrasonography (B-mode), SWE and histologic sizes. With qualitative and quantitative SWE analysis, sensitivity was 94% and specificity 73%. Malignant lesions appeared more heterogeneous, with higher stiffness and ratio values than benign lesions (p < 0.001). For malignant lesions, SWE size was better correlated to histologic size than B-mode size. Using benign SWE signs to selectively downgrade category 4a and 4b lesions, the specificity improved from 13% to 51% without loss in sensitivity (100%) compared to ultrasound. 相似文献
12.
Wen-Bin Dai Jun Xu Bo Yu Lin Chen Yue Chen Jia Zhan 《Ultrasound in medicine & biology》2021,47(2):288-295
The aim of study was to explore the correlation between shear wave elastography (SWE) and grade group (GG) of prostate cancer (PCa). This retrospective study involved prostate-specific antigen elevated patients with elevated prostate-specific antigen levels who underwent SWE before transrectal ultrasound-guided needle biopsy. A total of 49 PCa lesions were reviewed after radical prostatectomy; 3–7 regions of interest were placed within the cancerous area on axial view compared with the tumor foci outlined on the slides by pathologist. The maximum SWE value was measured, quantitative SWE parameters (Emax, Emean, Emin and standard deviation [SD]) were recorded and correlated with GG and then parameters were compared between indolent (≤2) and aggressive (≥3) GGs. The diagnostic value of each parameter was compared with the receiver operating characteristic curve. Forty-nine PCa foci were divided into two groups on the basis of their GGs. All SWE parameters exhibited a significant linear trend with GG. The area under the receiver operating characteristic curve (AUC) was 0.816 for Emax; with a cutoff point of 84 kPa, sensitivity and specificity were 81.3% and 82.4% to differentiate low and high GGs in PCa. The AUC was 0.776 for Emean; with a cutoff point of 71 kPa, sensitivity and specificity were 78.1% and 76.5%. For Emin, the AUC was 0.739; with a cutoff point of 60 kPa, sensitivity and specificity were 68.8% and 70.6%. For SD, the AUC was 0.681; with a cutoff point of 8.3 kPa, sensitivity and specificity were 46.9% and 94.1%. There were no significant differences between the four SWE parameters (p < 0.05 for all). SWE features were correlated with GGs, and this correlation may have excellent diagnostic performance in predicting high GG in PCa. 相似文献
13.
《Ultrasound in medicine & biology》2019,45(8):1909-1917
The aim of this study was to evaluate whether quantitative analysis of elastic heterogeneity (EH) could improve the diagnostic performance of shear wave elastography (SWE) in breast lesions. From August 2016 to August 2017, 280 patients were enrolled in this prospective study. All lesions were evaluated with the ultrasound Breast Imaging Reporting and Data System (BI-RADS) and SWE with Virtual Touch tissue imaging quantification. The shear wave velocity (SWV) of the three areas of highest stiffness and lowest stiffness within the lesions were measured to calculate the maximum SWV (SWVmax), mean SWV (SWVmean) and EH. The EH was determined as the difference between the averaged highest SWV and lowest SWV. The diagnostic performance—including the area under the receiver operating characteristic curve (AUC) and the sensitivity and specificity of BI-RADS, EH, SWVmax and SWVmean—were analyzed. The AUC of EH, SWVmax and SWVmean were 0.963, 0.949 and 0.937, respectively. The sensitivity of EH was 93.75%, which was significantly higher than that of SWVmax (84.37%) and SWVmean (84.37%) (p < 0.001); there was no significant difference in the specificity among EH, SWVmax and SWVmean (p > 0.05). For category 4A lesions, EH predicted all the malignant lesions, while two cancers were misdiagnosed by SWVmax and SWVmean, respectively. Quantitative analysis of EH can improve the sensitivity of SWE for the differential diagnosis of breast lesions without loss of specificity. 相似文献
14.
Yi-Hsuan Hsiao Yu-Len Huang Wen-Miin Liang Che Lin Shou-Jen Kuo Dar-Ren Chen 《Ultrasound in medicine & biology》2009
The aim of this study was to compare the diagnostic performance of nonharmonic ultrasound (US) and tissue harmonic imaging (THI) using three-dimensional (3D) power Doppler sonographic technique to classify benign and malignant breast tumors by vascularization. From January 2003 to February 2004, we evaluated 200 patients and one of lobular carcinoma in situ was excluded from the malignant category. One hundred and ninety-nine subjects were enrolled. All subjects with one or more breast masses were studied with 3D power Doppler US nonharmonic and harmonic technologies. Sixteen of 199 subjects were excluded because masses exceeded 3 cm limit of our US probe's footprint (n = 5) or no harmonic Doppler information (n = 11). A total of 97 benign and 86 pathologically proven malignant breast tumor images were analyzed. 3D power Doppler US imaging was performed using a Voluson730 US system. Three histogram indices, the vascularization index (VI), flow index (FI) and vascularization-flow index (VFI), on both nonharmonic and harmonic images were calculated for the intratumor and for shells with an outside thickness of 3 mm surrounding the breast lesion. A multilayer perception (MLP) neural network classifier used the vascularity indices to determine whether the breast tumors are benign or malignant. The receiver operating characteristic (ROC) curves are performed to estimate the diagnostic performances for nonharmonic and harmonic methods. ROC curve analysis used overall age, volume, VI, FI and VFI for both intratumor and shells with an outside thickness of 3 mm surrounding the breast lesions in nonharmonic US and THI. The area under the ROC curve (AZ) was 0.9086 and 0.9009 (p = 0.3770). The sensitivity was 90.7% and 83.7% (p = 0.72), respectively, and the specificity was 92.8% and 92.8% (p = 1.00), respectively. In conclusion, the performance of 3D power Doppler US with respect to the characterization of solid breast masses as benign or malignant was not significantly improved with tissue harmonic imaging. (E-mail: darren_chen@cch.org.tw) 相似文献
15.
《Ultrasound in medicine & biology》2022,48(8):1672-1680
The aim of the study described here was to assess the evaluation of tissue stiffness around lesions by sound touch shear wave elastography (STE) in breast malignancy diagnosis. This was an institutional ethics committee–approved, single-center study. A total of 90 women with breast masses examined with conventional ultrasound and STE were eligible for enrollment from December 2020 to July 2021. The maximum and mean elastic values of masses, Emax and Emean, were determined. Shell function was used to measure the maximum and mean elastic values of tissues around masses in annular shells 0.5, 1.0, 1.5 and 2.0 mm wide, recorded as corresponding Emax-shell and Emean-shell. All parameters were analyzed and compared with histopathologic results. Receiver operating characteristic curves were constructed to assess diagnostic performance. Logistic regression analysis was conducted to determine the best diagnostic model. Collagen fiber content of tissues around breast lesions was evaluated using Masson staining and ImageJ software. Ninety women with breast masses were included in this study; 50 had benign (mean diameter 15.84 ± 4.39 mm) and 40 had malignant (mean diameter 17.40 ± 5.42 mm) masses. The diagnostic value of Emax-shell-2.0 was the highest (area under the curve = 0.930) with a sensitivity of 87.5% and specificity of 88%. According to stepwise logistic regression analysis, Emax-shell-2.0 and age were independent predictors of malignancy. Emax-shell-2.0 was also found to be highly correlated with the collagen fiber content of tissue in the malignant group (r = 0.877). Tissue stiffness around lesions measured by STE is a useful metric in identifying malignant breast masses by reflecting collagen fiber content, and Emax-shell-2.0 performs best. 相似文献
16.
Ji-Yeon Han Jin Hwa Lee Eun-Kyung Kim Suyoung Shin Myong Jin Kang Keun-Cheol Lee Kyung Jin Nam 《Journal of Medical Ultrasonics》2014,41(1):39-44
Purpose
To retrospectively review sonographic findings of breast cancers presenting as only microcalcifications on mammography and to evaluate factors essential for differentiating ductal carcinoma in situ (DCIS) from invasive cancers.Methods
We retrospectively reviewed the medical records of 620 consecutive patients with confirmed breast cancer according to surgery performed between March 2008 and October 2011 at our institution. Of these, 53 lesions from 52 patients who had only microcalcifications without a mass or other associated findings on mammography were selected. Sonographic findings of microcalcification areas were analyzed and correlated with the histopathological findings.Results
Of the 53 lesions, 26 (49.18 %) were classified as invasive cancer and 27 (50.9 %) as DCIS. Ultrasonography (US) showed only echogenic calcifications in five (9.4 %), calcifications within hypoechoic parenchymal thickening in 14 (26.4 %), calcifications within ductal changes in three (5.7 %), and calcifications within a mass in 14 (26.4 %). Seventeen (32.1 %) lesions were not visible on US. Negative findings in US were more frequently observed for DCIS (n = 15, 55.6 %) than for invasive cancers (n = 2, 7.7 %) (p < 0.001). Masses (n = 11, 42.3 % of invasive cancer; n = 3, 11.1 % of DCIS; p = 0.01) were more frequently observed in invasive cancers than in DCIS.Conclusions
US findings of breast cancers presenting as only mammographic microcalcifications were significantly different between DCIS and invasive cancers. Targeted US of microcalcifications might be helpful for predicting invasive cancers and for determining the clinical preoperative work-up, including axillary staging. 相似文献17.
目的探讨剪切波弹性成像(SWE)鉴别乳腺影像报告和数据系统(BI-RADS)4类乳腺肿块的价值。方法回顾性分析经术后病理证实的96个BI-RADS 4类乳腺肿块,比较良性(良性组,n=43)及恶性肿块(恶性组,n=53)剪切波参数,包括弹性最大值(SWE max)、最小值(SWE min)和平均值(SWE mean);以受试者工作特征(ROC)曲线确定SWE max、SWE min及SWE mean的截断值,比较其ROC曲线下面积(AUC)、敏感度、特异度和准确率,评价并比较SWE对BI-RADS 4a、4b及4c亚分类的诊断准确率。结果良性组SWE max和SWE mean均低于恶性组(P均<0.01),组间SWE min差异无统计学意义(P>0.05);SWE max、SWE mean的AUC分别为0.86、0.83,均高于SWE min的AUC(0.59,P均<0.01);SWE max诊断敏感度、特异度和准确率分别为96.23%、81.40%和89.58%,SWE mean分别为94.34%、76.74%和86.46%,均明显高于SWE min的34.00%、37.21%和35.42%(P均<0.01);SWE max和SWE mean的AUC及其诊断BI-RADS 4类乳腺良恶性肿块的敏感度、特异度、准确率差异均无统计学意义(P均>0.05)。SWE max和SWE mean对BI-RADS 4a、4b及4c乳腺肿块的诊断准确率明显高于SWE min(P<0.05)。结论BI-RADS 4类乳腺恶性肿块的SWE max和SWE mean均高于良性肿块。高频超声SWE可有效鉴别BI-RADS 4类乳腺良恶性肿块,SWE max和SWE mean的诊断效能优于SWE min。 相似文献
18.
《Ultrasound in medicine & biology》2021,47(11):3111-3121
The usefulness of color Doppler ultrasound (CD) in distinguishing between benign and malignant breast lesions remains controversial. Our prior study, the Japan Association of Breast and Thyroid Sonology (JABTS) BC-04 study (malignant: 839, benign: 569), found CD was useful in breast cancer diagnosis, and we developed CD diagnostic criteria. The first aim of the current study (the CD-CONFIRM study) was to evaluate the usefulness of the CD diagnostic criteria. The second aim was to evaluate the relationship between CD and elastography. We evaluated ultrasound images of breast masses from 13 institutions (malignant: 639, benign: 712). While the sensitivity of B-mode alone was very high and was not significantly improved with CD, the specificity was significantly improved with CD (61.2%–69.2%, p < 0.0001). Furthermore, the specificity of the combination of B-mode and CD improved significantly with the addition of elastography (72.8%–79.0%, p < 0.0001). This study found that the CD criteria are useful, and CD and elastography are independent. 相似文献
19.
目的 探讨剪切波弹性成像(SWE)联合CEUS在校正乳腺影像报告和数据系统(BI-RADS)3~5类乳腺肿瘤中的应用价值。方法 收集50例乳腺病变患者(57个病灶),其中良性病灶28个,恶性29个。对所有病灶术前行常规超声、SWE和CEUS检查,以常规超声进行BI-RADS分类,并采用SWE、CEUS及SWE联合CEUS对BI-RADS分类进行校正。以病理结果为金标准,计算常规超声、SWE、CEUS及SWE联合CEUS诊断乳腺良恶性病灶的敏感度、特异度和诊断正确率。结果 SWE参数最大杨氏模量值(Emax)诊断乳腺良恶性病灶的临界值为87.2 kPa,CEUS的临界值为8.5分,SWE联合CEUS的多因素Logistic回归模型为Y(P)=-18.785+0.161X1+11.822X2,X1为Emax,X2为增强后病灶大小改变。SWE联合CEUS将11个病灶正确降为3级,4个病灶误诊;SWE联合CEUS诊断乳腺良恶性病灶的敏感度、特异度和诊断正确率分别为100%(29/29)、85.71%(24/28)和92.98%(53/57)。结论 SWE联合CEUS对BI-RADS 3~5类乳腺病灶具有良好的校正作用,可提高超声诊断正确率。 相似文献
20.
《Ultrasound in medicine & biology》2022,48(9):1879-1887
The aims of this study were to investigate the value of sound touch elastography (STE) in predicting axillary lymph node metastasis (ALNM) in patients with invasive breast cancer (IBC) and to explore whether lysyl oxidase (LOX) is correlated with increasing stiffness and promotion of metastasis in IBC. A total of 142 lesions in 142 patients were assessed by STE. The STE values of IBCs in the two groups were compared and the best cutoff values for diagnosing ALNM determined. Immunohistochemistry was used to detect LOX expression. Collagen fiber and elastic fiber content was determined by Masson and Weigert elastic fiber staining. Correlation analyses were performed to identify the associations of the data. The optimal cutoff values of Emax (maximum stiffness value of the tumor) and Smax (maximum stiffness value of the shell) for predicting ALNM of IBC were 94.58 and 148.78 kPa. Immunohistochemistry and Masson and Weigert elastic fiber staining were performed on 67 samples. LOX expression and collagen volume fraction were significantly higher in the ALNM+ group than in the ALNM– group (p = 0.04 and 0.03), except for elastic fiber content (p = 0.628). Moreover, Emax, Smax and LOX expression were positively correlated with collagen volume fraction (r = 0.624, 0.512, and 0.533, respectively). Emax and Smax were found to be predictors for ALNM of IBC. STE could serve as a non-invasive method for assessing lymph node status before surgery. Overexpression of LOX and increased collagen fiber contributed to the increased stiffness in the lesions and metastases of IBC. 相似文献