声触诊组织量化技术及生化指标在脂肪肝定量诊断中的应用

目的 探讨声触诊组织量化技术(VTQ)测量肝脏剪切波速度(SWV)与生化指标在脂肪肝定量诊断及分度中的临床应用价值.方法 应用VTQ技术测量225例受检者肝脏SWV,包括轻、中及重度脂肪组185例和正常组40例.收集生化指标包括丙氨酸转移酶(ALT)、天门冬氨酸转移酶(AST)、总胆固醇(CHO)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)值,并分析各定量指标与脂肪肝的关系.结果 正常组与脂肪肝组的SWV比较差异有统计学意义(P＜0.05),在正常组与轻、中、重度脂肪肝组4组的SWV两两比较中,除正常组与轻度脂肪肝组差异无统计学意义(P＞0.05)外,其余各组之间的SWV比较差异均具有显著统计学意义P＜0.05).正常组与脂肪肝组的ALT、AST、CHO、TG、HDL-C、LDL-C比较差异有统计学意义(P＜0.05).肝脏的SWV与ALT、AST具有相关性(P=0.02,P=0.00).结论 VTQ技术及各生化指标对脂肪肝定量诊断具有一定的价值,为临床诊断及治疗提供了可靠、客观的依据,具有良好的临床应用前景.     

声触诊组织定量技术在 IgA 肾病的应用简

目的评价声触诊组织定量（virtual touch tissue quantification,VTQ）技术在lgA肾病（IgA nephropathy,IgAN）的应用价值。方法选择2012年1月1日至4月30日北京协和医院经肾活检证实的28例IgAN患者,对所有患者左肾进行常规超声（肾脏长径、皮质厚度、叶间动脉阻力指数）及VTQ超声[剪切波速度（shear wave velocity,SWV）]检查。分析常规超声与VTQ指标间,以及各超声指标与患者临床／病理指标一慢性肾脏病（chronic kidney disease,CKD）分期、Lee分级、肾小球硬化指数（glomerulars clerosis index,GSI）、肾小管萎缩（tubular atrophy,TA）以及肾间质纤维化（interstitial fibrosis,IF）的相关性。结果IgAN患者。肾脏常规超声指标与其VTQ结果、临影病理指标无显著相关性（P〉0．05）;VTQ测定的SWV与CKD分期（r=-0．382,P=0．045）、Lee分级（r=-0．407,P=0．031）及IF（r=-0．397,P=0．036）呈负相关,与GSI和TA无显著相关性（P〉0．05）。结论通过VTQ技术测定的肾皮质swV与多项临床／病理指标存在相关性,这一新型超声弹性成像技术的临床意义值得进一步研究。     

Diagnosis of Thyroid Nodules Using Virtual Touch Tissue Quantification Value and Anteroposterior/Transverse Diameter Ratio

This paper proposes an effective approach to differential diagnosis of thyroid nodules using a hierarchical classification model based on the Virtual Touch tissue quantification (VTQ) value and anteroposterior/transverse diameter (A/T) ratio. One hundred twenty nodules (92 benign, 28 malignant) were analyzed using this approach by combining the quantitative elastic characteristic with the conventional sonographic feature. First, nodules were classified as benign (VTQ values <2.27 m/s), malignant (VTQ values >2.73 m/s) and indeterminate (2.27 m/s ≤ VTQ values ≤2.73 m/s) using two cutoff points selected on the basis of receiver operating characteristic analysis. Second, the indeterminate nodules were separated into malignant and benign nodules using an A/T ratio ≥1. The advantage of this approach was that it could alleviate the limitation of an overlap in VTQ values between benign and malignant nodules. According to the pathologic results, the accuracy of this approach was 95%. The proposed approach may potentially improve diagnostic accuracy.     

桥本氏甲状腺炎临床进程的声触诊组织定量技术研究

目的 运用声触诊组织定量技术探讨桥本氏甲状腺炎（Hashimoto''s thyroiditis,HT）在不同临床进程中的组织弹性变化。 方法 回顾性分析153例经临床确诊的HT患者,所有患者均经过实验室血清学检查,正常对照组50例。根据HT的二维超声图像特征分为局灶型（I类）、类结节型（II类）、弥漫回声减低型（III类）、弥漫回声增强型（IV类）,分别对应于HT的临床初期、进展期、活动期、恢复期;运用声触诊组织定量技术（virtual touch tissue quantification,VTQ）分析不同时期的HT的剪切波速度（shear wave velocity,SWV）变化。 结果 HT超声表现局灶型（I类）35例,类结节型（II类）59例,弥漫回声减低型（III类）27例,弥漫回声增强型（IV类）32例;对照组SWV值与HT组比较差异有统计学意义（P＜0.05）;HT组SWV值不同组别间除II、III类间差异无统计学意义,其余组别间比较差异有统计学意义（P＜0.05）;随HT临床进程的发展SWV值由I类逐渐升高至II、III类达峰值,至IV类逐渐下降。     

声触诊组织量化技术评价桥本氏甲状腺炎进程的可行性

目的：探讨声触诊组织量化技术（virtual touch tissue quantification,VTQ）在评价桥本氏甲状腺炎进程中的价值.材料与方法：收集66例经临床确诊的桥本氏甲状腺炎（Hashimoto＇s thyroiditis,HT）的患者,根据甲状腺功能分为甲状腺功能亢进组、甲状腺功能正常组、甲状腺功能减低组,并以50例甲状腺正常者为对照组,测量甲状腺VTQ值,分别统计各组间VTQ值的差异,并分析其与血清中抗甲状腺球蛋白抗体（TGAb）、抗甲状腺过氧化物酶抗体（TPOAb）.结果：VTQ值对照组＜甲亢组＜甲功正常组＜甲减组,VTQ值与血清中TGAb、TPOAb含量之间无相关性.结论：声触诊组织量化技术有助于评价HT的病程进展情况.     

Acoustic Radiation Force Impulse Imaging with Virtual Touch Tissue Quantification: Measurements of Normal Breast Tissue and Dependence on the Degree of Pre-compression

Acoustic radiation force impulse imaging (ARFI) with Virtual Touch tissue quantification (VTTQ) enables the determination of shear wave velocity in meters per second (m/s). We investigated shear wave velocity in normal breast tissue and analyzed the influence of the degree of pre-compression on the measurements. In repeated measurements and with normal pre-compression, the mean shear wave velocity in breast parenchyma was significantly higher than that in breast adipose tissue (3.33 ± 1.18 m/s vs. 2.90 ± 1.10 m/s; p < 0.001; 712 measurements in 89 patients). Furthermore, we found a significant positive correlation between degree of pre-compression and velocity measurements. Shear wave velocities with low, moderate and high pre-compression were 1.89, 3.18 and 4.39 m/s in parenchyma, compared with 1.46, 2.55 and 3.64 m/s in adipose tissue, respectively (p < 0.001; 360 measurements in 60 patients). VTTQ of breast tissue is a feasible method with high accuracy; however, the degree of pre-compression applied may significantly influence the measurements.     

Sonographic Characteristics of Papillary Thyroid Carcinoma with Coexistent Hashimoto's Thyroiditis: Conventional Ultrasound,Acoustic Radiation Force Impulse Imaging and Contrast-Enhanced Ultrasound

Our objective was to provide the various sonographic characteristics of papillary thyroid carcinomas for Hashimoto's thyroiditis (HT) patients, including conventional ultrasound (US), acoustic radiation force impulse Virtual Touch imaging and quantification (ARFI-VTIQ) and contrast-enhanced ultrasound (CEUS). Sixty-nine HT patients with 85 thyroid nodules (TNs) (49 malignant and 36 benign) were enrolled in this study. We evaluated the size, shape, margin, echogenicity, presence of halo, calcification, vascularity and ARFI-VTIQ and CEUS parameters for each nodule and compared the findings with the reference standards of histopathological and/or cytologic results. Univariate analysis indicated that compared with benign TNs with HT, papillary thyroid carcinomas with HT more often had taller-than-wider shapes, ill-defined margins, microcalcifications, peripheral vascularity, relatively harder stiffness with a higher shear wave speed, hypo-enhancement, peak intensity index <1 and area under the curve index <1 at pre-operative US, ARFI-VTIQ and CEUS. Multivariate analysis revealed that ill-defined margins, microcalcifications and peak intensity index <1 are independent characteristics related to malignant TNs for their differentiation from benign TNs (all p < 0.05). Our study indicated that pre-operative multiparameter US characteristics may serve as a useful tool to identify malignant TNs in HT patients.     

声触诊组织量化技术测量肝硬度的可重复性研究

目的：研究声触诊组织量化（virtual touch tissues quantification,VTQ）技术测量肝硬度的可重复性.方法：应用德国西门子公司ACUSON S2000超声诊断仪对104例慢性乙型肝炎患者进行VTQ测量.104例患者中,男性81例、女性23例;平均年龄（46.2±12.7）岁.每位患者分别由2位医师行VTQ测量：1位为从事超声诊断工作20年的高年资医师,1位为低年资住院医师.每位医师对受检者的肝左、右叶分别测量5次,采用组内相关系数（intraclass correlation coefficient,ICC）评价测量VTQ的一致性.结果：高年资医师所测肝左叶及右叶VTQ值分别为（2.07±0.73）m/s与（1.83±0.63） m/s,住院医师所测VTQ值分别为（2.19±0.80）m/s与（1.82±0.69）m/s,2位医师对肝左叶测量VTQ的一致性好（ICC=0.859）,肝右叶测量VTQ的一致性很好（ICC=0.922）,肝右叶VTQ值的观察者间一致性较左叶好.高年资医师所测肝左、右叶VTQ值间差异有统计学意义（P＜0.001）,肝左、右叶VTQ的一致性尚可（ICC=0.589）;住院医师所测的肝左、右叶VTQ值间差异有统计学意义（P＜0.001）,肝左、右叶VTQ的一致性尚可（ICC=（0.510）.结论：VTQ技术检测肝硬度的重复性好,该技术可作为无创性评价肝纤维化的新方法.     

2013版BI-RADS分类标准结合声触诊组织量化技术鉴别诊断乳腺良恶性病灶的价值

目的 探讨2013版超声乳腺影像报告和数据系统(BI-RADS)分类诊断标准结合声触诊组织量化技术(VTQ)鉴别乳腺良恶性病灶的价值。方法 对251位患者共334个乳腺病灶行常规超声检查,并用BI-RADS分类诊断标准判断其良恶性;然后应用VTQ技术测量病灶的剪切波速度(SWV);以病理结果作为金标准,构建受试者的工作特征曲线,比较两种方法的诊断价值。结果 BI-RADS分类诊断标准及VTQ技术鉴别乳腺良恶性病灶的ROC曲线下面积分别为0.899、0.855,两者差异无统计学意义(z=1.367,P=0.172)。结论 BI-RADS分类诊断标准与VTQ技术结合可以提高乳腺病灶的诊断准确性。对于BI-RADS 4类的病灶,联合VTQ技术可减少不必要的穿刺活检或手术。     

声触诊组织量化成像技术联合超声造影技术在TI-RADS 4类甲状腺结节良恶性鉴别诊断中的应用价值

目的 探讨声触诊组织量化成像（VTIQ）技术及超声造影（CEUS）技术在TI-RADS 4 类甲状腺结节良恶性鉴别诊断中的应用价值。 方法 选取欲行手术切除并经病理证实的TI-RADS 4 类甲状腺结节患者86例（共98个结节），术前行VTIQ及CEUS检查，获取结节的剪切波速度（SWV）值（SWVmax、SWVmin、SWVmean、SWVratio）及超声造影特征，建立VTIQ联合CEUS技术Logistic 回归模型，通过曲线下面积比较VTIQ、CEUS及两者联合后的回归模型对TI-RADS 4 类甲状腺结节良恶性的鉴别诊断价值。结果 TI-RADS 4 类甲状腺良、恶性结节组内SWVmax、SWVmin、SWVmean、SWVratio值比较，差异均具有统计学意义（P均<0.05）。超声造影特征中，强化程度、强化均匀、强化方式、环状增强、消退方式在TI-RADS 4 类甲状腺良、恶性结节中差异有统计学意义（P均＜0.05）。多因素分析显示SWVmean（＞2.96m/s）、强化程度（低增强）是诊断TI-RADS 4 类甲状腺恶性结节的重要指标（P均＜0.05）。SWVmean、CEUS技术及Logistic回归模型诊断TI-RADS 4类甲状腺良、恶性结节的曲线下面积分别为0.862、0.835和0.933。结论 声触诊组织量化成像技术及超声造影技术均可鉴别TI-RADS 4类甲状腺结节良恶性，两者联合可明显提高对TI-RADS 4类甲状腺结节的诊断价值。