ARFI elastography in patients with chronic autoimmune liver diseases: A preliminary study

ObjectiveAcoustic radiation force impulse (ARFI) is a new software-based technique that evaluates liver stiffness during B-mode ultrasonography. The purpose of this study was to evaluate the accuracy of ARFI in distinguishing patients with chronic autoimmune liver disease from healthy subjects.Material and methodsWe enrolled 9 adult patients (8 women, 1 man; age 48.1 ± 12.8 years) with chronic autoimmune disease (primary biliary cirrhosis (PBC, n = 3), autoimmune hepatitis (AIH, n = 2), primary sclerosing cholangitis (PSC, n = 1) and overlap syndromes, (n = 3) who underwent a liver biopsy and 11 healthy volunteers (age 34.7 ± 10.4 years; 7 women, 4 men). Liver stiffness was evaluated and expressed as the shear wave velocity (SWV) in m/sec. We used a US scanner Siemens-Acuson S2000, evaluating the right liver lobe and the left liver lobe.ResultsThe SWV was significantly higher in cases (right lobe: 1.51 ± 0.44; left lobe: 1.57 ± 0.40) than in controls (right lobe: 1.08 ± 0.10; left lobe: 1.12 ± 0.13) (right lobe: P = 0.002; left lobe: P = 0.013). We found no significant correlation between right and left lobe SWVs in cases (P = 0.779) or controls (P = 0.385). The SWV cut-off that best distinguished cases from controls was 1.25 m/sec (accuracy: AUC=0.885; sensitivity: 70.6%; specificity: 95.5%).ConclusionsARFI elastography is a noninvasive ultrasonographic technique that can differentiate healthy subjects from patients with fibrotic stages of chronic liver disease.     

Evaluation of Non-alcoholic Fatty Liver Disease Using Acoustic Radiation Force Impulse Imaging Elastography in Rat Models

The aim of this study is to evaluate the utility of acoustic radiation force impulse (ARFI) elastography for assessing hepatic fibrosis stage and non-alcoholic fatty liver disease (NAFLD) severity, as well as the relationship among hepatic histologic changes using shear wave velocity (SWV). Animal models with various degrees of NAFLD were established in 110 rats. The right liver lobe was processed and embedded in a fabricated gelatin solution (porcine skin). Liver mechanics were measured using SWV induced by acoustic radiation force. Among the histologic findings, liver elasticity could be used to differentiate normal rats from rats with simple steatosis (SS) as well as distinguish SS from non-alcoholic steatohepatitis (NASH), with areas under the receiver operating characteristic curves (AUROC) of 0.963 (95% confidence interval = 0.871–0.973) and 0.882 (95% confidence interval = 0.807–0.956), respectively. For NAFLD rats, the diagnostic performance of ARFI elastography in predicting significant fibrosis (F ≥ 2) had an AUROC of 0.963. For evaluating steatosis severity, we found a progressive increase in ARFI velocity proportional to steatotic severity in NAFLD rat models, but we observed no significant differences for steatotic severity after excluding the rats with fibrosis. ARFI elastography may be used to differentiate among degrees of severity of NAFLD and hepatic fibrotic stages in NAFLD rat models.     

声脉冲辐射力成像技术鉴别诊断肝脏良恶性局灶性病变

目的探讨声脉冲辐射力成像技术(ARFI)对肝脏良恶性局灶性病变的鉴别诊断价值。方法对64例患者76个肝脏局灶性病变进行ARFI检查并分析,包括声触诊组织成像技术(VTI)和声触诊组织量化技术(VTQ)。所有患者均经手术或穿刺病理证实或两种增强影像学检查(CEUS、CT、MRI)确诊。采用ROC曲线评价剪切波速(SWV)对肝脏局灶性病变良恶性的鉴别诊断价值,并确定临界点。结果 VTI声像图中,31个(31/40,77.50%)恶性病灶和13个(13/36,36.11%)良性病灶呈灰黑色(P<0.05);良性病灶SWV明显低于恶性病灶[(1.67±0.61)m/s vs(2.80±1.07)m/s,P<0.01)。以SWV=2.04m/s为临界点鉴别肝脏局灶性病变的良恶性,其敏感度、特异度和准确率分别是82.50%、80.60%和81.58%。结论 ARFI有助于鉴别诊断肝脏良恶性局灶性病变,具有良好的临床应用前景。     

Serial change of liver stiffness measured by acoustic radiation force impulse imaging in chronic liver disease: correlation with biochemical markers

Purpose

In patients with chronic diffuse liver diseases, liver fibrosis severity is an important element for prognosis and for selecting therapy. Acoustic radiation force impulse (ARFI) imaging techniques were recently developed to measure liver fibrosis, but their specificity is impaired by cholestasis, inflammation, or edema in acute hepatitis. Herein, our objectives were to evaluate serial changes in shear wave velocity (SWV) and to correlate these changes with biochemical activity.

Methods

This study included 108 patients who underwent ARFI because of viral hepatitis [hepatitis B (HBV) or C (HCV)] with serial follow-up after 3–6 months at our institution between August 2011 and May 2013. Based on baseline and follow-up ARFI, we divided patients with HBV and HCV into two groups: a decreasing SWV group and a non-decreasing SWV group. We evaluated serial SWV changes and correlated these changes with biochemical activity changes.

Results

The patients were divided into SWV groups as follows: decreasing SWV group (HBV, n = 23; HCV, n = 7) and non-decreasing SWV group (HBV, n = 40; HCV, n = 38). In both HBV and HVC patients, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were significantly decreased at follow-up in the decreasing SWV group.

Conclusions

The liver stiffness value assessed by ARFI became lower over time in patients who had decreasing AST and ALT levels. According to this study, ARFI overestimates fibrosis grade in patients with high AST and ALT. Thus, assessment of liver fibrosis by ARFI elastography should include consideration of biochemical markers such as AST and ALT levels and additional follow-up using ARFI elastography.     

声触诊组织定量技术检测正常儿童肾皮质弹性

目的 探讨声触诊组织定量技术检测正常儿童肾皮质弹性的价值。方法 超声诊断仪检测600名健康儿童双侧肾脏皮质SWV值,比较不同年龄、性别、侧别间SWV值差异;对372名儿童同时测量双侧肾脏大小(以肾脏长轴最大径线作为肾脏长度,以此值为参考),比较不同肾脏大小SWV值差异;对101名儿童分别测量双侧肾脏中极和下极SWV值,比较不同取样部位SWV值差异;对31名5~6岁儿童分别用4C-1凸阵探头和9L-4线阵探头测肾脏SWV值,比较不同探头间肾脏SWV值差异。结果 健康儿童不同年龄、肾脏大小、取样部位间肾皮质SWV值差异均有统计学意义(P均<0.05);而不同性别、侧别、探头间肾皮质SWV值差异均无统计学意义(P均>0.05)。结论 ARFI可用于儿童肾脏弹性检测。     

Acoustic Radiation Force Impulse Elastography for Chronic Liver Disease: Comparison with Ultrasound-Based Scores of Experienced Radiologists,Child-Pugh Scores and Liver Function Tests

The purpose of our study was to investigate whether acoustic radiation force impulse (ARFI) elastography provides better diagnostic performance for diagnosis of chronic liver disease and correlates better with Child-Pugh scores and liver function tests, compared with an ultrasound (US) scoring system based on visual assessment of conventional B-mode US images by experienced radiologists. Five hundred and twenty-one patients with clinically proven chronic liver disease (n = 293), fatty liver (n = 95) or normal liver (n = 133) were included in this study. B-mode liver US and ARFI elastography were performed in all patients. ARFI elastography was performed at least five times, with each measurement obtained at a different area of the right hepatic lobe; mean shear wave velocity (SWV) was calculated for each patient. The mean SWV was compared with US-based scores from two radiologists (based on liver surface nodularity, parenchyma echotexture and hepatic vein contour), Child-Pugh scores and liver function tests. The mean SWV of the normal liver group was 1.08 m/s ± 0.15; of the fatty liver group, 1.02 m/s ± 0.16; and of the chronic liver disease group, 1.66 m/s ± 0.60 (p < 0.001). The area under the receiver operating characteristics curve of the mean SWV in ARFI elastography was significantly higher than that of the conventional B-mode US-based scores by two radiologists (0.89 vs. 0.74 and 0.77, p < 0.05), with a sensitivity of 75.4% and a specificity of 89.5% at the cut-off value of 1.22 m/s. The sensitivity of the mean SWV was significantly higher than the US-based scores (p < 0.001), although the specificity was not (p > 0.05). The mean SWV was better correlated with Child-Pugh scores and all liver function tests (except total protein) than the US-based scores from two radiologists. In conclusion, ARFI elastography showed better diagnostic performance than visual assessment of experienced radiologists for diagnosis of chronic liver disease, as well as for evaluation of the severity of chronic liver disease. (E-mail: leejy4u@snu.ac.kr)     

声辐射脉冲力技术定量鉴别诊断良恶性乳腺肿块

目的 探讨声辐射脉冲力(ARFI)技术在定量诊断乳腺良恶性肿块中的应用价值.方法 对175例患者227个乳腺肿块进行常规二维、彩色多普勒超声检查,同时采用ARFI技术测量剪切波速度(SWV),取样框分别置于肿块内部、肿块与周围腺体组织交界处以及周围腺体组织,以病理结果为金标准.结果 良性肿块内部及交界处SWV分别为(2.38士0.52)m/s、(2.14±0.61)m/s;恶性肿块内部及交界处SWV分别为(7.62士2.51)m/s、(5.32±2.63)m/s.恶性肿块内部及交界处SWV值均明显高于良性肿块(P均＜0.05);良性肿块内部与交界处SWV值均明显高于周围腺体(P均＜0.05).绘制ROC曲线,以3.29 m/s为分界值,ARFI技术诊断良恶性肿块的敏感度为78.9％,特异度为98.3％,准确率为77.5％,曲线下面积为0.914.结论 ARFI在乳腺良恶性肿块诊断与鉴别诊断中具有重要临床意义.     

声触诊组织定量技术诊断结节性甲状腺肿的初步研究

目的 探讨结节性甲状腺肿的声脉冲辐射力(ARFI)弹性成像声触诊组织定量(VTQ)特征.方法 应用ARFI弹性成像VTQ技术检测结节性甲状腺肿病灶44个,记录病灶的横向剪切波速度(SWV)并与其周围相同深度甲状腺组织的SWV比较.并计算每个病灶与其周围甲状腺组织的SWV比值.结果 结节性甲状腺肿的SWV为0.61～4.02 m/s,平均值为(2.24±0.83)m/s;周围甲状腺组织的SWV为1.18～3.32 m/s,平均值为(2.05±0.46)m/s,两者比较差异无统计学意义(t=1.37,P=0.174).病灶与其周围甲状腺组织SWV比值为0.31～2.59,平均值为(1.17±0.45).结论 AFRI弹性成像VTQ技术能定量反映结节性甲状腺肿病灶与周围甲状腺组织的弹性特征,可对结节性甲状腺肿的诊断提供一定的帮助.     

声脉冲辐射力弹性成像在颈部淋巴结良恶性诊断中的价值

目的探讨声脉冲辐射力成像（ARFI）中声触诊组织成像（VTI）与声触诊组织定量（VTQ）技术在颈部淋巴结良恶性鉴别诊断中的应用价值。 方法分析65例100个颈部淋巴结疾病患者的常规超声及ARFI成像特征,测量淋巴结VTI图像与二维图像面积比及其SWV值,以病理学结果作为金标准,绘制ROC曲线,获得区分颈部淋巴结良恶性VTI面积比值及SWV的临界值。 结果5个常规超声评价指标中P < 0.01的有短径/长泾、淋巴门及微钙化,它们在常规超声鉴别颈部淋巴结良恶性的敏感度、特异度及准确度分别为84.81%,90.47%,86%;86.07%,95.23%,88%;0,52.38%,11%。非特异性反应性淋巴结组VTI面积比为1.07±0.26,恶性淋巴结组的VTI面积比为1.68±0.31,两者相比差异具有统计学意义（T=8.9356,P < 0.001）。非特异性反应性淋巴结组的SWV值为1.72±0.89 m/s,恶性淋巴结组的SWV值为2.68±0.48 m/s,二者比较差异具有统计学意义（T=4.7141,P < 0.001）。构建VTI及SWV的ROC曲线后,其AUC分别为0.799和0.862,根据ROC曲线选取鉴别良恶性淋巴结的VTI面积比及SWV值的临界值分别为1.2、1.9,其对应的敏感度、特异度、准确度分别为96.20%,95.23%,96%;89.87%,90.47%,90%。 结论ARFI弹性成像有助于鉴别颈部淋巴结的良恶性。       

基于剪切波超声弹性成像评价不同姿势对胸腰筋膜和斜方肌组织硬度的影响

目的:利用剪切波弹性成像技术研究健康男性受试者在不同姿态下胸腰筋膜和斜方肌硬度变化,以了解姿态对胸腰筋膜硬度的影响和探索胸腰筋膜与斜方肌之间的关系。方法:招募20名健康男性青年分别在无前倾坐位、前倾30°坐位和前倾60°坐位下,利用剪切波弹性超声(SWE)测量右侧胸腰筋膜(L1-2、L3-4)和斜方肌(T5-6、T7-8、T9-10、T11-12)的硬度。结果:与无前倾坐位相比,随着前倾坐位的角度增加,胸腰筋膜(L3-4、L1-2)和斜方肌(T11-12)的硬度显著增加(P<0.05);斜方肌(T5-6)的肌肉硬度在前倾30°时无显著增长(P>0.05),在前倾60°时肌肉硬度极显著增加(P<0.001);所有测量点的硬度变化均与胸腰筋膜L3-4处的硬度变化有极强相关性(r>0.8)。结论:胸腰筋膜与斜方肌之间存在极显著的连续性,且前倾坐位能够显著增加胸腰筋膜的硬度,进而影响到斜方肌的硬度。     

剪切波弹性成像诊断18F-FDG PET/CT显像甲状腺局灶性高代谢偶发瘤

目的 探讨超声剪切波弹性成像对¹⁸F-FDG PET/CT显像高代谢的甲状腺局灶性良恶性偶发瘤的诊断价值。方法 对因非甲状腺疾病接受¹⁸F-FDG PET/CT显像、并存在甲状腺局灶性高代谢偶发瘤的61例患者（67个病灶）行超声剪切波弹性成像,测量偶发瘤的剪切波速度（SWV）,联合常规二维超声判断甲状腺偶发瘤的良恶性,并与病理结果对照,比较良恶性偶发瘤间SWV值的差异,以ROC曲线评价SWV值的诊断效能。结果 67个高代谢偶发瘤中,恶性38个,良性29个。常规二维超声联合剪切波弹性成像诊断恶性偶发瘤的敏感度为89.47%（34/38）,特异度为86.21%（25/29）,准确率为88.06%（59/67）。良性和恶性偶发瘤的SWV分别为（2.06±0.75）m/s和（4.64±1.75）m/s,差异有统计学意义（t=8.133,P<0.001）。ROC曲线分析结果显示,SWV值诊断恶性偶发瘤的AUC为0.946（P<0.001）,临界值为2.28 m/s时,敏感度为97.4%,特异度为82.8%,约登指数最大,为0.802。结论 超声剪切波弹性成像对¹⁸F-FDG PET/CT显像高代谢甲状腺局灶性偶发瘤具有较高诊断价值,以SWV=2.28 m/s为临界值时诊断效能最大。     

Quantitative Shear Wave Velocity Measurement on Acoustic Radiation Force Impulse Elastography for Differential Diagnosis between Benign and Malignant Thyroid Nodules: A Meta-analysis

The aim of this study was to evaluate the diagnostic performance of quantitative shear wave velocity (SWV) measurement on acoustic radiation force impulse (ARFI) elastography for differentiation between benign and malignant thyroid nodules using meta-analysis. The databases of PubMed and the Web of Science were searched. Studies published in English on assessment of the sensitivity and specificity of ARFI elastography for the differentiation of thyroid nodules were collected. The quantitative measurement of ARFI elastography was evaluated by SWV (m/s). Meta-Disc Version 1.4 software was used to describe and calculate the sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, diagnostic odds ratio and summary receiver operating characteristic curves. We analyzed a total of 13 studies, which included 1,854 thyroid nodules (including 1,339 benign nodules and 515 malignant nodules) from 1,641 patients. The summary sensitivity and specificity for differential diagnosis between benign and malignant thyroid nodules by SWV were 0.81 (95% confidence interval [CI]: 0.77–0.84) and 0.84 (95% CI: 0.81–0.86), respectively. The pooled positive and negative likelihood ratios were 5.21 (95% CI: 3.56–7.62) and 0.23 (95% CI: 0.17–0.32), respectively. The pooled diagnostic odds ratio was 27.53 (95% CI: 14.58–52.01), and the area under the summary receiver operating characteristic curve was 0.91 (Q* = 0.84). In conclusion, SWV measurement on ARFI elastography has high sensitivity and specificity for differential diagnosis between benign and malignant thyroid nodules and can be used in combination with conventional ultrasound.     

实时剪切波弹性成像技术评估跟腱急性闭合性损伤

目的 探讨采用实时剪切波弹性成像（SWE）技术根据跟腱硬度评价急性跟腱闭合性损伤的临床价值。方法 对49例跟腱急性闭合性损伤患者行高频超声及实时SWE检查，获得患侧和健侧跟腱的杨氏模量值和剪切波速度（SWV），比较完全断裂跟腱、不完全断裂跟腱与正常侧跟腱的差异。结果 经手术证实跟腱完全断裂患者36例，高频超声均诊断正确；经MRI证实，跟腱不完全断裂13例，其中超声正确诊断10例，漏诊3例。跟腱完全断裂组、跟腱部分断裂组和正常跟腱组跟腱杨氏模量值分别为（130.02±24.64） kPa、（281.08±84.36） kPa和（546.51±48.52） kPa，SWV分别为（6.23±1.04） m/s、（9.05±0.97） m/s和（14.33±1.41） m/s，3组间总体差异和两两比较差异均有统计学意义（P均<0.05）。结论 超声弹性成像可以作为高频超声诊断跟腱急性闭合性损伤的有效补充。     

声辐射力脉冲成像鉴别诊断肾肿瘤

目的 探讨声辐射力脉冲成像(ARFI)鉴别诊断肾良恶性肿瘤的价值,以及ARFI所示肿瘤硬度与CEUS反映的肿瘤灌注之间的关系。 方法 对经手术或穿刺病理证实的35例肾肿瘤患者依次行ARFI及CEUS检查,运用声触诊组织量化(VTQ)技术测量肿瘤组织的剪切波速度(SWV),采用ROC曲线评价SWV对肾良恶性肿瘤的鉴别诊断价值并确定界值,并将ARFI所示肿瘤硬度与CEUS反映的肿瘤灌注情况进行对比。 结果 35例肾肿瘤患者中,VTQ测量的肾良恶性肿瘤的SWV值分别为(2.25±0.33)m/s和(2.72±0.46)m/s(P<0.05);以SWV=2.355 m/s为界值,鉴别诊断肾良恶性肿瘤的敏感度为83.30%,特异度为72.70%。22例(22/35,62.86%)肾肿瘤SWV值高于肾皮质,其中CEUS表现为高强化19例,低强化3例;13例(13/35,37.14%)肾肿瘤SWV值低于肾皮质,其中CEUS表现为高强化5例,低强化8例。不同硬度的肾肿瘤血流灌注程度不同,质地硬者灌注较高,质地软者灌注较低(P<0.05)。 结论 ARFI技术有助于鉴别良恶性肾肿瘤,其所示肾肿瘤硬度与血流灌注有关。     

声脉冲辐射力成像技术定量诊断慢性肝病

目的 探讨声脉冲辐射力成像(ARFI)技术定量检测慢性肝病肝纤维化的价值。方法 研究对象包括61例乙型肝炎病毒阳性患者(慢性肝病组)、29例肝硬化患者(肝硬化组)及109名健康对照者(对照组)。采用ARFI技术定量测量肝实质剪切波速度。结果 慢性肝病组、肝硬化组、对照组肝脏平均剪切波速分别为(1.59±0.38)m/s、(2.35±0.53)m/s、(1.11±0.18)m/s,两两比较差异均有统计学意义(P<0.05)。结论 ARFI可无创测量肝实质剪切波速度,客观反映肝组织的弹性模量,有望成为定量评估肝纤维化的客观准确的新方法。     

剪切波速度提高肌筋膜疼痛综合征患者疗效的价值初探

目的 探索剪切波速度（shear wave velocity, SWV）提高肌筋膜疼痛综合征（myofascial pain syndrome, MPS）患者治疗疗效的价值。方法 选择我院收治的MPS患者80例并定义为MPS组,同期选择健康志愿者80例作为对照组。采用视觉模拟评分(visual analogue scale, VAS)、疼痛评定指数(values of pain rating index, PRI)、现时疼痛强度 (present pain intensity, PPI)评估患者疼痛程度。使用声辐射力脉冲（acoustic radiation force impulse, ARFI）弹性成像观察斜方肌组织弹性并记录SWV值。MPS患者均接受6个疗程的常规治疗,之后将疗效达到显效及以上的患者根据患者自愿原则进行分组,继续以SWV作为疗效观察指标并进行治疗的定义为继续治疗组,不继续治疗的患者定义为停止治疗组。所有患者进行为期1年的随访,比较继续治疗组与停止治疗组治疗后复发率的差异。结果 治疗过程中患者VAS值和SWV值均呈下降趋势,其差异有统计学意义（FVAS=3.649,PVAS=0.000;FVAS=2.631,PVAS=0.018）。MPS患者整体治疗的显效率为78.8%。治疗后MPS患者的VAS 、PRI、PPI均显著低于治疗前,差异均具有统计学意义（均P＜0.05）。MPS组治疗后平均SWV（2.63±1.09 m/）显著低于治疗前（4.35±1.56 m/s）,差异具有统计学意义（t=8.084,P=0.000）。继续治疗组累计无复发率（93.33%）显著高于停止治疗组（61.29%）,Logrank检验差异有统计学意义（X2=8.760,P=0.003）。结论 ARFI的SWV值可以客观反应MPS患者病情的严重程度,利用SWV值作为疗效的判定标准可能可以获得更好的疗效。     

Efficacy of foam rolling with additional vibration stimulation on the mobility of the thoracolumbar fascia. An observational study

IntroductionObservations show that foam rolling improves joint movements. Likewise, it can be stated that a vibration stimulation of the tissue leads to improved joint mobility.MethodThis study investigates whether the combination of foam rolling and vibrations (31 Hz) can influence the sliding of the thoracolumbar fascia more effectively than normal foam rolling. 45 subjects participated in the study and were divided into a foam roll with additional vibration group (FRV), a foam roll group (FR) and a control group (CG). The intervention groups rolled out the gluteal muscles, the lateral trunk and the upper and lower back. Mobility measures were taken pre and post the respective intervention. Subsequent cross correlation software analysis quantified the sliding of the fascia and calculated its shear strain mobility (SSM).ResultsThe sliding of the thoracolumbar fascia improved significantly within the FRV by 2.83 mm (SD ± 1.08/p < .001), in the FR by 0.96 mm (SD ± 0.43/p < .001) and in the CG decreased the sliding by 0.1401 mm (SD ± 0.28/p = .076). The fascia/fascia SSM increased in the FRV by 22.61% (SD ± 15.64/p < .001), in the FR by 11.41% (SD ± 20.38/p = .056) and in the CG decreased the SSM by 0.9473% (SD ± 11.35/p < .751). The lumbar movement increased in both intervention groups, but showed no significant result.ConclusionThe use of a foam roll with additional vibration and standard intervention have increased thoracolumbar fascia sliding and lumbar movements. The improved shear strain mobility can be attributed to the multi-activity of mechanoreceptors, such as Pacini- and Ruffini-Bodies.     

2型糖尿病患者跟腱病变的超声特征

目的利用剪切波弹性成像(SWE)评估2型糖尿病(T2DM)跟腱截面积、周长、厚径及生物学弹性的变化,并探讨T2DM患者跟腱剪切波速度与糖化血红蛋白水平之间的相关性。方法收集T2DM患者及健康体检志愿者各50例。测量跟腱中段横截面积、周长及厚径,剪切波弹性成像测量该处跟腱弹性的剪切波速度(SWV),记录T2DM患者的入院糖化血红蛋白值,绘制剪切波速度与T2DM患者糖化血红蛋白水平的相关性散点图。结果受试者左、右侧中段跟腱弹性对比及性别间对比均无统计学意义(P>0.05);对照组跟腱各参数较A组均无统计学意义(P>0.05),较B组仅SWV值有统计学意义(P<0.05),较C组跟腱周长、厚径、截面积及SWV均有显著差异,且差异有统计学意义(P<0.05);A组较B组仅SWV有统计学差异(P<0.05),A组较C组除周长无统计学意义外,其余参数均有统计学差异(P<0.05);B组较C组截面积与SWV值两参数统计学差异显著(P<0.05)。相关性分析显示,糖化血红蛋白水平与跟腱SWV值显著相关(r=0.601,P<0.05),糖化血红蛋白值越高对跟腱生物学弹性的影响也就越大。结论SWE技术可定量评估T2DM患者跟腱生物学弹性的改变,为临床医师在预防糖尿病下肢病变的过程中提供参考。     

声辐射力脉冲弹性成像诊断干燥综合征涎腺病变

目的 探讨声辐射力脉冲弹性成像（ARFI）诊断干燥综合征（SS）涎腺病变的价值。方法 收集SS患者38例（SS组）及同期健康志愿者29名（对照组）,以声触诊组织量化（VTQ）技术对所有受检者双侧腮腺和颌下腺行ARFI,检测其剪切波速度（SWV）;绘制ROC曲线,获得SWV诊断SS的最佳阈值,采用Pearson相关系数分析SWV值与实验室指标的相关性。结果 SS组腮腺、颌下腺SWV值均高于对照组（P均<0.01）。ARFI诊断腮腺SS的最佳阈值2.14 m/s,敏感度、特异度、Youden指数及曲线下面积（AUC）分别为94.7%、86.2%、0.809及0.971。ARFI诊断颌下腺SS的最佳阈值1.94 m/s,敏感度、特异度、Youden指数及AUC分别为86.8%、82.8%、0.696及0.899。腮腺SWV值与SS患者的血沉（ESR）、IgG、类风湿因子水平呈正相关（P均<0.05）;颌下腺SWV值与SS患者的IgA、ESR、IgG水平呈正相关（P均<0.05）。结论 ARFI诊断SS具有较高价值,可定量提供SS腺体的硬度值,并可反映疾病活动状况,进而对疗效进行评估。     

胃肠超声造影联合或不联合ARFI技术诊断胃壁常见良恶性病变的比较研究

目的:探讨胃肠超声造影联合或不联合声脉冲辐射力成像(ARFI)技术对胃壁常见良恶性病变的诊断价值。方法:回顾性分析2017年4月~2019年4月间医院收治的67例胃壁增厚患者的临床资料,根据病理组织活检结果分为良性组(49例)、恶性组(18例)。两组患者均行胃肠超声造影及ARFI技术检查。记录两组患者的超声造影指标(胃半排空时间(t_1/2)、胃窦动力指数(MI))及ARFI技术指标(平均剪切波速度(SWV)),并采用受试者工作特征(ROC)曲线比较以上指标对胃壁常见良恶性病变的的诊断价值。结果:良性组患者的t_1/2、SWV分别为(73.04±18.65)min、(1.38±0.26)m/s,均低于恶性组患者的(84.20±21.44)min、(2.41±0.74)m/s,而MI为(63.37±21.05)大于恶性组患者的(52.22±16.55),差异具有统计学意义(P<0.05)。ROC曲线显示,t_1/2、MI、SWV对胃壁常见良恶性病变具有一定诊断价值,且三项联合的(AUC=0.946,P<0.05)的诊断价值较高。结论:胃肠超声造影联合ARFI技术诊断胃壁常见良恶性病变的价值优于单纯胃肠超声造影,给临床诊断胃壁常见良恶性病变提供了新思路。