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find Keyword "超声诊断" 23 results
  • LOCALIZATION OF SMALL BENIGN TUMOR OF PANCREAS (REPORT OF 12 CASES)

    目的 探讨胰腺良性微小肿瘤的术前及术中定位方法。方法 对1995年1月至2000年8月收治的12例直径lt;2 cm的胰腺良性肿瘤定位方法进行分析。结果 术前B超、CT或MRI和动脉造影的诊断敏感性分别是16.7%、40.0%和87.5%。通过术中探查发现病灶7例(58.3%),其余5例借助于术中B超定位成功4例。结论 术中B超是目前最有价值的定位手段,而且还能提供病灶更详细的资料,对顺利完成手术、减少并发症有重要作用。在定位过程中注意操作细节可提高定位诊断的成功率。

    Release date:2016-08-28 05:30 Export PDF Favorites Scan
  • 子宫峡部剖宫产切口部位妊娠的彩色多普勒超声诊断分析

    目的探讨子宫峡部剖宫产切口部位妊娠的彩色多普勒超声声像图特点,为临床诊疗提供有价值的参考依据。 方法选取2011年8月-2013年7月诊断的12 例子宫峡部剖宫产切口部位妊娠的患者作为研究对象,回顾性分析其彩色多普勒超声声像图特点及临床资料。 结果12例患者中5例停经时间短、妊娠囊较小,位置完全位于子宫峡部切口处因声像图典型而确诊;3例因停经时间长、妊娠囊大部分位于宫腔内,少部分位于切口处误诊为宫内孕;2例切口妊娠流产,误诊不全流产;另外2例因院外人工流产术后阴道流血增多就诊,诊断为切口妊娠。 结论彩色多普勒超声对子宫峡部剖宫产切口妊娠的诊断具有准确性、可靠性。

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  • Discussion on Detailed Classification of Breast Ultrasonographic BI-RADS Category 4 Lesions

    ObjectiveTo investigate the methods and significances of the breast ultrasonographic breast imaging reporting and data system (BI-RADS) category 4 lesions divided into category 4a, 4b, and 4c, and to assess the risk of malig-nancy of lesions with BI-RADS category 4 in order to improve the accuracy of diagnosis. MethodsTwo hundred and eighty-eight breast lesions with BI-RADS category 4 confirmed by histopathology were collected. The ultrasonographic characteristics of benign and malignant lesions, containing the shape, aspect ration, margin, calcification, changes of the surrounding tissue, boundary, blood flow characteristics, internal echo, rear echo of the lesions, were comparatively anal-yzed, and the lesions with BI-RADS-US category 4 were divided into 4a, 4b, 4c according to these ultrasonographic charac-teristics and analyzed by statistics. ResultsThere were 192 malignant lesions and 96 benign lesions in the 288 breast lesions. There were statistical significances in the benign and malignant lesions with the shape, aspect ratio, margin, calci-fication, change of surrounding tissue, and boundary (P < 0.05), in other words, the proportion of these ultrasonographic characteristics were higher in the malignant lesions as compared with the benign lesions. But there were no significant differences of internal echo, rear echo, and blood flow characteristics between two lesions (P > 0.05). The positive predictive value of malignant tumor with BI-RADS category 4a, 4b, and 4c were 21.74%, 58.90%, and 91.78%, respectively, and there was significant difference (χ2=106.09, P=0.000). ConclusionsThe classification of breast lesions with BI-RADS category 4 is refined, it could more accurately assess the risk of benign and malignant breast masses. At the same time, it has an important clinical significance for diagnosis and treatment of benign and malignant breast masses.

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  • 糖尿病视网膜病变患者视网膜学流动力学研究

    Release date:2016-09-02 05:58 Export PDF Favorites Scan
  • 睾丸畸胎瘤的超声诊断及其鉴别诊断

    目的 总结睾丸畸胎瘤的超声表现。 方法 回顾性分析2006年4月-2011年12月经病理证实的25例睾丸畸胎瘤的声像图特征,彩色血流显像以及超声与病理诊断对比资料。 结果 在25例睾丸畸胎瘤中,未成熟畸胎瘤4例(16%),成熟性畸胎瘤19例(76%),未分类2例(8%)。本组睾丸畸胎瘤超声表现共同特征是:患侧睾丸内部可见囊、实混合性团块,成熟性畸胎瘤的囊性成分多,未成熟畸胎瘤的实性成分多,瘤内检出血流的可能性也增大。 结论 高频超声是诊断睾丸畸胎瘤的重要方法。

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  • Effect of Hemorheology on Ultrasonic Doppler Blood Flow Spectrum Diagram

    The present research aims to point out the long-existing defect of analyzing the spectrum diagram only from the perspective of haemodynamics instead of haemorheology. In the light of the theories of haemodynamics and haemorheology, the causes of spectrum diagram formation of carotid artery blood at the rapid and slow flow can be clarified completely and accurately. Four conclusions have been drawn in the end. As long as the velocity gradient is large enough, obvious red blood cells concentrate to the shaft even in the big or bigger blood vessels; the spectrum diagram is the powerful proof of the two phase flow model of blood; the spectrum diagram can be completely and accurately analyzed only by combining haemodynamics with haemorheology; and only when the red blood cells concentrate to the shaft, the big or bigger blood vessels can be regarded as haemogeneous fluid.

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  • Comparison Study of Oral Ultrasound Contrast Agents with Different Echogenic for Gastrointestinal Diseases

    【摘要】 目的 探讨不同回声类型超声造影剂在胃肠疾病诊断中的价值。 方法 采用“胃窗声学造影剂”充盈检查法,用凸阵3.5 MHz探头,对2009年3-8月366名受检者行经腹壁超声检查。受检者随机分为两组:饮水者为A组,饮有回声造影剂者为B组。 结果 选择性地应用合适的造影剂,能有效地提高对胃肠疾病的超声诊断水平。【Abstract】 Objective To evaluate the application of contrast agents with different echogenic in the diseases of stomach and intestine. Methods Totally, 366 patients were included in the study from March to August 2009. Patients were randomly divided into two groups: group A (oral acoustic contrast agent) and group B (water). Contrast-enhanced Doppler sonography was performed with 3.5 MHz abdomen probe. Results Contrast agent with anechoic was good for showing iso-echoic and hyperechoic tissue.Hyperechoic contrast agent was better for showing hypoechoic changes according to its long sitting-time in stomach. Conclusion Contrast enhanced ultrasound has practical value in diagnosis of the diseases of stomach and intestine.

    Release date:2016-09-08 09:50 Export PDF Favorites Scan
  • 超声诊断在胆囊三角中的应用

    目的探讨B型超声测定术前急性结石性胆囊炎胆囊壁厚度与术中胆囊三角显示之间的关系。 方法将2011年7月-2012年12月42例急性结石性胆囊炎患者,按术前B型超声提示的胆囊壁厚情况分为壁厚≥4 mm组(n=17)和<4 mm组(n=25),分析胆囊三角与胆囊壁厚之间的关系。 结果42例患者术中胆囊三角可显示率为52.4%,其中胆囊壁厚≥4 mm组显示率仅为17.6%,<4 mm组显示率为76.0%,两组在术中胆囊三角分离显示率比较,差异有统计学意义(P<0.05)。随着胆囊壁厚度的增加,胆囊三角显示清晰度减低。 结论术前B型超声测定急性结石性胆囊炎胆囊壁厚,可间接提示胆囊三角显露难易程度,指导急性结石性胆囊炎患者手术时机与方法的选择,避免因胆囊三角显示不清而造成胆道损伤。

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  • Risk assessment of thyroid papillary carcinoma with ultrasound

    ObjectiveTo evaluate the value of preoperative risk assessment of papillary thyroid carcinoma with ultrasound for clinic diagnosis and treatment.MethodsThe data of 400 patients with papillary thyroid carcinoma received operative treatment in 2017 were retrospectively analyzed. Recorded and analyzed the ultrasonic risk assessment and postoperative grading of clinic risk assessment, to evaluate coherence and correlation between them.ResultsThere were 400 lesions with an average size of (12.8±8.5) mm. Among 400 lesions, diameter of 214 lesions less than 10 mm, diameter of 178 lesions were between 10 mm and 40 mm, and diameter of 8 lesions were larger than 40 mm. A total of 242 cases had lymph node metastasis and 309 cases had capsule invasion. Clinical and ultrasoud risk assessment was performed on 400 lesions. There were 224 lesions with low risk of clinical risk stratification vs. 111 lesions with low ultrasonic risk, 148 lesions with intermediate risk of clinical risk stratification vs. 270 lesions with intermediate ultrasonic risk, and 28 lesions with high risk of clinical risk stratification vs. 19 lesions with high ultrasonic risk. The consistency of postoperative recurrence risk stratification and preoperative ultrasound recurrence risk stratification was moderate (κ=0.414, P<0.01). In addition, the consistency between ultrasound examination and clinical lymph node metastasis was poor (κ=0.291, P<0.05), and the consistency of invasion of the capsule was moderate (κ=0.402, P<0.05).ConclusionPre- operative evaluation of recurrence risk grading before thyroid ultrasound, focusing on individualized preoperative assessment, the assessment is more detailed and detailed, and is helpful for follow-up treatment and early screening for recurrence risk.

    Release date:2018-12-13 02:01 Export PDF Favorites Scan
  • 胎儿心脏房室传导的研究进展

    房室传导是胎儿心脏电生理活动的基础;房室传导阻滞的发生将严重影响心脏泵血功能,并危害胎儿健康。现着重对胎儿房室传导的生理、病理及临床等方面的研究进展进行介绍,旨在为胎儿房室传导阻滞等心脏疾病的筛查提供参考。

    Release date:2016-09-07 02:38 Export PDF Favorites Scan
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