Clinical significance of B-mode ultrasound found bladder trabeculation in BPH patients

Objective To study the role of bladder trabeculation found by B-mode ultrasound in evaluating the degree of bladder outlet obstruction ( BOO ) and the bladder function in benign prostatic hyperplasia ( BPH) patients. Methods Conducted prospective research to determine differences in clinical data and urodynamic

A Study on the Temperature Correlation of B-mode Ultrasonic Image Gray for Noninvasive Temperature Monitoring in Hyperthermia

This paper deals with the temperature correlation of gray scale of B-mode ultrasound image from heated tissue. In this study, many in-vitro fresh pig livers are heated in a temperature range from 28 ℃ to 45℃, from which a series of B-mode ultrasonic images of livers were obtained. The gray-value is evaluated from the ultrasound images respectively. A correlation of the mean gray value of the selected regions (12×12 pixels) in B-mode ultrasonic images of liver and its temperature was pointed out. And the experiment results agreed the evaluation well. And it is possible to monitor the tissue temperature changing in hyperthermia using this correlation.

Estimation of Sediment Incipient Velocity Using B-Mode Ultrasound Imaging Technique

Sediment incipient velocity （SIV） is a vital parameter for sediment research and river dynamics. This paper describes a novel method of estimating SIV based on the known flow velocity in the movable-bed model experiment. In this method, we use B-mode ultrasound imaging technique to get video images of moving particles and topography under water. By statistical analysis of video images, the relationship between the average number of imaging particles and flow velocity is obtained. The relationship between the change rate of average number and flow velocity is analyzed in sediment incipient process. These relationships are used to estimate the SIV. Lastly, the changed topography verifies the estimated velocity. The results show there is a sudden change in these relationships which can be used to estimate the SIV with high resolution by using a B-mode ultrasound device. The estimated SIV of plastic sands （particle size is about 0.25 mm） is 3.64 cm · s^-1 and the estimated SIV of natural sands （particle size is about 0.25 mm） is 5.47 cm · s^-1in the same condition.

Application and prospects of AI-based radiomics in ultrasound diagnosis

Artificial intelligence (AI)-based radiomics has attracted considerable research attention in the field of medical imaging, including ultrasound diagnosis. Ultrasound imaging has unique advantages such as high temporal resolution, low cost, and no radiation exposure. This renders it a preferred imaging modality for several clinical scenarios. This review includes a detailed introduction to imaging modalities, including Brightness-mode ultrasound, color Doppler flow imaging, ultrasound elastography, contrast-enhanced ultrasound, and multi-modal fusion analysis. It provides an overview of the current status and prospects of AI-based radiomics in ultrasound diagnosis, highlighting the application of AI-based radiomics to static ultrasound images, dynamic ultrasound videos, and multi-modal ultrasound fusion analysis.

Contrast-enhanced ultrasound imaging for intestinal lymphoma

BACKGROUND Intestinal lymphoma is a rare tumor.Contrast-enhanced ultrasound(CEUS)findings of intestinal lymphoma have not been reported previously,and the relationship between CEUS and clinicopathological features and prognostic factors is still unknown.AIM To describe the B-mode US and CEUS features of intestinal lymphoma and investigate the correlation of CEUS and histopathological features.METHODS This was a single-center retrospective study.Eighteen patients with histologically confirmed intestinal lymphoma underwent B-mode US and CEUS examinations between October 2016 and November 2019.We summarized the features of Bmode US and CUES imaging of intestinal lymphoma and compared the frequency of tumor necrosis in intestinal lymphomas with reference to different pathological subtypes(aggressive or indolent)and clinical stage(early or advanced).The time–intensity curve parameters of CEUS were also compared between patients with normal and elevated serum lactate dehydrogenase.RESULTS In B-mode imaging,four patterns were observed in intestinal lymphoma:Mass type(12/18,66.7%),infiltration type(1/18,5.6%),mesentery type(4/18,22.2%)and mixed type(1/18,5.6%).All cases were hypoechoic and no cystic areas were detected.On CEUS,most cases(17/18,94.4%)showed arterial hyperechoic enhancement.All cases showed arterial enhancement followed by venous wash out.A relatively high rate of tumor necrosis(11/18,61.1%)was observed in this study.Tumor necrosis on CEUS was more frequent in aggressive subtypes(10/13,76.9%)than in indolent subtypes(1/5,20.0%)(P=0.047).There were no correlations between tumor necrosis and lesion size and Ann Arbor stage.There was no significant difference in time–intensity curve parameters between normal and elevated lactate dehydrogenase groups.CONCLUSION B-mode US and CEUS findings of intestinal lymphoma are characteristic.We observed a high rate of tumor necrosis,which appeared more frequently in aggressive pathological subtypes of intestinal lymphoma.

Ultrasonogram of hepatocellular carcinoma is associated with outcome after radiofrequency ablation

AIM: To investigate the association between B-mode ultrasound classification of small hepatocellular carcinoma (HCC) and outcome after radiofrequency ablation (RFA).

Contrast-enhanced ultrasound:Improving the preoperative staging of hepatocellular carcinoma and guiding individual treatment

AIM: To investigate the clinical role of contrast-enhanced ultrasound (CEUS) combined with contrast-enhanced computed tomography (CE-CT) or magnetic resonance imaging to improve the preoperative staging of hepatocellular carcinoma (HCC) and guide surgical decision-making. METHODS: Sixty-nine patients who underwent liver resection for HCC in our center were enrolled prospectively in the study. CEUS and CE-CT/MRI were performed before surgery. Intraoperative ultrasound (IOUS) was carried out after liver mobilization. Lesions depicted by each imaging modality were counted and mapped. To investigate the impact of tumor size on the study, we divided the patients into two groups, the 'Smaller group'(S-group, <= 5 cm in diameter) and the 'Largergroup' (L-group, > 5 cm in diameter). The sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of CE-CT/MRI, CEUS, IOUS, CEUS+CE-CT/MRI and the tumor node metastasis staging of tumors were calculated and compared. Changes in the surgical strategy as a result of CEUS and IOUS were analyzed. RESULTS: One hundred and twenty-seven nodules, comprising 94 HCCs confirmed by histopathology and 33 benign lesions confirmed by histopathology and follow-up, were identified in 69 patients. The overall diagnostic sensitivity rates of CE-CT/MRI, CEUS, IOUS and CEUS+ CE-CT/MRI were 78.7%, 89.4%, 89.4% and 89.4%, respectively. There was a significant difference between CEUS + CE-CT/MRI and CE-CT/MRI (P = 0.046). Combining CEUS with CT or MRI increased, the diagnostic specificity compared with CT/MRI, CEUS and IOUS, and this difference was statistically significant (100%, 72.7%, 97.0%, and 69.7%, P = 0.004, P = 0.002, P = 0.002, respectively). The diagnostic accuracy was significantly higher for CEUS + CT/MRI compared with CT/MRI (92.1% vs 77.2%, P = 0.001). The TNM staging of tumors based on CEUS + CE-CT/MRI approximated to the final pathological TNM staging (P = 0.977). There was a significant difference in the accuracy of TNM staging when comparing CEUS + CECT/MRI with CE-CT/MRI (P = 0.002). Before surgery, strategies were changed in 15.9% (11/69) of patients as a result of CEUS. Finally, only 5.7% (4/69) of surgical strategies were changed because of IOUS findings. In the S-group, CEUS revealed 12 false positive lesions, including seven false positive lesions that were diagnosed by preoperative imaging examinations and five by IOUS. In contrast, in the L-group, IUOS revealed eight new malignant lesions; six of these lesions were true HCCs that were also identified by preoperative CEUS. CONCLUSION: CEUS combined with CT or MRI improves the accuracy of preoperative staging for hepatocellular carcinoma and may help to guide individualized treatment for patients with HCC. CEUS may better identify non-malignant lesions in patients with small tumors and discover new malignant lesions in patients with large tumors. (C) 2014 Baishideng Publishing Group Inc. All rights reserved.

Diagnostic accuracy of endoscopic ultrasonography for rectal neuroendocrine neoplasms

AIM: To investigate the diagnostic accuracy of endoscopic ultrasonography (EUS) for rectal neuroendocrine neoplasms (NENs) and the differential diagnosis of rectal NENs from other subepithelial lesions (SELs).

Relationship between Dual-Energy X-Ray Absorptiometry-Derived Appendicular Lean Tissue Mass and Total Body Skeletal Muscle Mass Estimated by Ultrasound

Dual-energy X-ray absorptiometry (DXA) is an attractive method for evaluating sarcopenia, age-related loss of skeletal muscle mass and function, using appendicular lean tissue (aLT) mass for criteria of diagnosis, although minimal radiation is exposed. Skeletal muscle (SM) mass can be estimated by using ultrasound-measured muscle thickness (MTH). However, the association between these two methods is unclear. To examine the relationship between DXA-derived aLT mass and total body SM mass estimated by ultrasound, thirty-six healthy adults (18 men and 18 women) aged 19 - 65 years participated in this study. Ultrasound-measured muscle thickness was used to estimate the total SM mass. DXA was used to estimate whole body and regional body composition, and aLT mass was considered equivalent to the sum of lean tissue in both the right and left arms and legs. Total SM mass (26.3 ± 4.4 kg for men and 15.7 ± 2.6 kg for women) estimated by ultrasound was similar to DXA-estimated aLT mass (24.5 ± 3.8 kg for men and 15.7 ± 2.7 kg for women). There was a strong correlation between DXA-measured aLT mass and total SM mass estimated by ultrasound in men (r = 0.927, n = 18) and women (r = 0.931, n = 18) as well as overall sample (r = 0.975, n = 36). The ratio of total SM mass to aLT mass was 1.07 for men and 1.00 for women. These results suggest that DXA-derived aLT mass can be accurately predicted from ultrasound estimated total SM mass, although the predicted value may underestimate in men (approximately 7% at the group level).

Curative effect analysis of therapeutic ultrasonic in vitro on hyperlipemia

Objective To observe the effects of therapeuti c ultrasound in vitro on hyperlipemi a.Methods Comparing clinical effects of only ultrasound treatment,only adminis tration of Geminifbrozip and combin ation of these two therapies.These p atientswere divided into three grou ps and the follow-up observation was 3months.Result Curative effect of the ultrasound gr oup was better than that of drug group(P <0.05).Curative effect of the combined therapy group was the best(P <0.01).Result of follow-up suggested that serum glyceryl trioleate and cholesterol relapse rate of ultrasonic group was lower than that of drug group .Serum g lyceryl trioleate and cholesterol r elapse rate of combined therapy grou p was the lowest.Conclusion Combination of ultrasound treatmen t in vitro and administration of Gemi nifbrozip is the best way to treat hyper-lipemia,and it is not easy to relapse.

超声B-Mode Ratio对糖尿病患者颌下腺脂肪沉积的诊断效能

为了对比评价超声B-mode ratio及MR-IP-OP两种检查方法对糖尿病患者颌下腺脂肪沉积的诊断效能。选取志愿者174人(糖尿病患者89人和健康志愿者85人),利用超声B-mode ratio技术和3D MR-IP-OP方法评估和检测颌下腺的脂肪含量。使用独立样本t检验比较两组患者B-radio和MRI-IP-OP的FF值组间差异。采用受试者工作特征曲线(ROC)分析两种技术对颌下腺脂肪沉积的诊断效能。用Spear-man相关系数评价两组参数之间的相关性。糖尿病组的B-mode ratio值(1.337±0.128)明显高于正常组(0.917±0.138)。糖尿病组MR-IP-OP的FF值(21.88±7.86%)明显高于正常组(8.87±3.09%)。ROC曲线表明脂肪沉积评价中B-mode ratio和3D MR-IP-OP的曲线下面积(AUC)分别为0.860和0.909,超声B-mode ratio和3D MR-IP-OP方法获得的结果间有良好相关性(r=0.502,p<0.001)。超声B-mode ratio对颌下腺脂肪变性的诊断具有良好的诊断效能,可以替代MR-IP-OP检查技术,并且有很好的临床应用前景。

钼粉粒度均匀性对钼渗铜材料组织的影响

采用熔渗法制备了钼渗铜材料。采用超声波探伤的方法对钼渗铜材料进行了无损检测,采用SEM和金相分析对钼渗铜材料进行了微观组织观察,分析了钼粉的粒度均匀性对钼渗铜钼材料组织的影响。研究结果表明:粉末粒度均匀性对钼骨架的渗铜性能有影响;粉末中存在的细颗粒较多或者有粉末团聚现象时,钼骨架局部细小孔隙聚集,铜难以渗入这些聚集的小孔隙,造成超声波探伤渗铜均匀性不佳;超声波探伤发现的“面积型渗铜不均”实际是“密集微孔聚集”。

Pre-Trained Deep Neural Network-Based Computer-Aided Breast Tumor Diagnosis Using ROI Structures

Deep neural network(DNN)based computer-aided breast tumor diagnosis(CABTD)method plays a vital role in the early detection and diagnosis of breast tumors.However,a Brightness mode(B-mode)ultrasound image derives training feature samples that make closer isolation toward the infection part.Hence,it is expensive due to a metaheuristic search of features occupying the global region of interest(ROI)structures of input images.Thus,it may lead to the high computational complexity of the pre-trained DNN-based CABTD method.This paper proposes a novel ensemble pretrained DNN-based CABTD method using global-and local-ROI-structures of B-mode ultrasound images.It conveys the additional consideration of a local-ROI-structures for further enhan-cing the pretrained DNN-based CABTD method’s breast tumor diagnostic performance without degrading its visual quality.The features are extracted at various depths(18,50,and 101)from the global and local ROI structures and feed to support vector machine for better classification.From the experimental results,it has been observed that the combined local and global ROI structure of small depth residual network ResNet18(0.8 in%)has produced significant improve-ment in pixel ratio as compared to ResNet50(0.5 in%)and ResNet101(0.3 in%),respectively.Subsequently,the pretrained DNN-based CABTD methods have been tested by influencing local and global ROI structures to diagnose two specific breast tumors(Benign and Malignant)and improve the diagnostic accuracy(86%)compared to Dense Net,Alex Net,VGG Net,and Google Net.Moreover,it reduces the computational complexity due to the small depth residual network ResNet18,respectively.

腮腺混合瘤、腺淋巴瘤及恶性肿瘤的超声造影弥散特征

目的探讨腮腺混合瘤(pleomorphic adenomoa,PA)、腺淋巴瘤(adenolymphomas,AL),及恶性肿瘤(malignant tumor,MT)在超声造影(contrast enhanced ultrasonography,CEUS)上定量弥散特征。方法对75例腮腺肿块患者(包括PA 31例、AL 27例和MT 17例)进行CEUS检查,绘制肿块及周边腺体组织的时间-强度曲线(time intensive curve,TIC)曲线,对比分析各组的弥散特征。手术病理结果为诊断的金标准。结果相比于周边腺体,PA组的TTP(time to peak)和TFP(the time from peak to one half)的差异均无统计学意义(均P>0.05)、而PI(peak intensity)的差异有统计学意义(P<0.05),表现为“等进、等退”高增强;AL组PI及TFP的差异均有统计学意义(均P<0.05),而TTP的差异无统计学意义(P>0.05),表现“等进、慢退”高增强;MT组的TTP及TFP的差异均无统计学意义(均P>0.05),但TTP的差异有统计学意义(P<0.05),表现为“快进、等退”高增强。联合应用“快进”或非“慢退”诊断MT的敏感度、特异度及准确度分别为88.23%(15/17)、77.59%(45/58)和80.00%(60/75)。结论在CEUS中,AL的“慢退”和MT的“快进”具有比较特征性表现,联合应用两者,可明显提高CEUS对腮腺恶性肿瘤的检出率。

25例布-加综合征的彩色多谱勒超声诊断

目的 探讨彩色多谱勒诊断布加综合征条件。方法 分析25例布加综合征彩超检查及X线血管造影检查结果。结果 肝内侧支循环及血流流向,下腔静脉、肝静脉一支或多支狭窄或阻塞是诊断布加氏综合征必备条件。另外,尾状叶肥大,血栓形成、局限性狭窄、膜状物回声,门静脉高压肝血管表现为布加综合征辅助诊断条件。结论 CDFI在BCS定性诊断符合率100%,定型诊断符合率96%,超声应为BCS临床影像学首选诊断方法。

经阴道彩色多普勒超声在剖宫产后子宫瘢痕妊娠中的诊断分析

目的探讨经阴道彩色多普勒超声检查对剖宫产术后子宫瘢痕妊娠的诊断意义。方法对经阴道彩色多普勒超声诊断为子宫瘢痕妊娠的34例患者进行回顾性分析。结果经阴道超声将患者分为单纯孕囊型、不均质包块型、部分位于宫颈管或宫腔型,彩色多普勒声像图有不同的表现,部分病灶区周边见丰富的血流信号,并可见五彩状血流显示,呈高频低阻型。治疗方案的选择与超声图像中孕囊或包块的类型,周围血流的情况以及子宫肌层的厚薄有关。结论经阴道彩色多普勒超声检查对子宫瘢痕妊娠的诊断是一个非常实用、方便的一线影像学检查手段,具有非常重要的临床应用价值。

无效语音过滤技术在医院超声业务的应用研究

通过调查超声科业务流程和需求,根据其工作特点,设计和实现了超声检查的语音录入和语音命令等功能.详细分析了超声业务工作中无效语音的问题,研究无效语音在超声科应用的主要根源,从而在传统语音识别方法上设计无效语音过滤技术的应用.在采用无效语音过滤技术后,语音识别准确率显著提高,无效语音过滤技术有效地解决了语音识别技术在医院超声业务的应用难点,对于推广至其他检查科室具有一定参考价值,并拓展了语音识别技术在医疗业务中应用的深度和广度.

日本血吸虫病肝脾肿的临床流行病学调查

根据在一重疫区,以血吸虫性肝脾肿的临床流行病学调查为重点的社区研究资料,描述了该社区在持续若干年间断和不规则化疗后肝脾肿的临床流行病学状态,并阐述了该社区日本血吸虫感染的流行率,感染度和患病率之间的关系。作者发现,在该社区特定条件下,血吸虫感染是高流行率伴低感染度状态,同时显示相当高程度的肝脾肿患病率。研究资料分析结果提示,肝脾肿的发生与感染的积累和持续时间,并在一定程度上与感染度有关。作者还指出应用便携式超声诊断仪作超声影像诊断调查是衡量日本血吸虫病患病或病情的敏感工具。

Magnetic resonance cholangiopancreatography for the detection of pancreatic duct stones in patients with chronic pancreatitis

AIM:To assess the role of magnetic resonance cholangiopancreatography(MRCP) in detection of pancreatic duct stones(PDS) in patients with chronic pancreatitis(CP).METHODS:Clinical data of 78 CP patients who were treated at the First Affi liated Hospital of Xi'an Jiaotong University(China) between January 2004 and July 2008 were retrospectively analyzed.A predictive model of pancreatic duct stones was established through logistic regression and its effectiveness was verifi ed.Among these patients, MRCP was performed in 60 patients who served as a control group, while 44 patients with a higher predictive value than the entry threshold of the predictive model served as an experimental group.RESULTS:The positive rate of PDS in the 78 patients with CP was 19.2%(15/78).The predictive entry threshold of the predictive model was 5%(P < 0.05).The possibility of existence of PDS could be predicted according to the following 4 indexes:gastrointestinal symptoms, intermittent abdominal pain, diabetes mellitus(DM)/impaired glucose tolerance(IGT) and positive B-mode ultrasound results.The incidence of PDS in the experimental group was higher than that in the control group(P < 0.05).CONCLUSION:MRCP is strongly suggested for the detection of PDS in patients with gastrointestinal symptoms, intermittent abdominal pain, DM/IGT and positive B-mode ultrasound results.

光面护壁爆破的护壁效果及作用机理探讨

试验研究了光面护壁爆破的护壁效果,论述了护壁爆破的作用机理。采用智能声波检测仪测试爆破前后岩体的超声波速度,从而评价光面护壁爆破与普通光面爆破在相同条件下的爆破效果,结果发现护壁爆破声波平均降低率1.45%,普通光面爆破平均降低4.83%,普通光面爆破是光面护壁爆破的3倍以上,显示出光面护壁爆破避免岩体损伤的优越性。分析认为:在冲击波和爆生气体准静压作用下,光面护壁爆破在产生定向爆裂岩石的同时,保留部分岩体得到药包外壳半圆管的保护,从而避免爆破损伤。在龙16号油气井钻前场地施工工程中应用,岩体损伤小,护壁效果好。