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1.
实时超声造影在肾脏肿瘤诊断中的研究现状 总被引：1，自引：0，他引：1
王建国 《河北北方学院学报(医学版)》2009,26(1)
彩色多普勒血流图及彩色多普勒能量图已广泛用于肿瘤的诊断和鉴别诊断,为临床诊疗提供了较多的帮助.但对小血管、低速血流及部位较深的肿瘤内血管显示仍不满意,人们期待能够应用超声造影改善对肿瘤的诊断能力[1].近年来,超声造影在肝脏占位性病变诊断的开展非常迅速,令人瞩目,其临床的应用已得到公认,而肾脏占位性病变,文献报道主要集中在基础研究方面[2,3],临床应用报道不多.肾脏本身的血供很丰富,相当于心输出量的1/5～1/4[4],大部分肾脏恶性肿瘤为多血供型[5],造影剂易于灌注.能更好地显示包括1cm以下的肿瘤、细小低速血流灌注情况和缺血区域[6,7].已有学者探索研究肾脏良恶性肿瘤的超声造影特征[8].本文就超声造影对肾脏肿瘤的诊断及鉴别诊断综述如下: 相似文献
2.
李桂华 《赤峰学院学报(自然科学版)》2009,25(2):74-75
涎腺疾病,不论是弥漫性或局限性病变,临床常难以作出较明确的诊断．超声作为一种简便、无创、快速的检查手段,能给临床提供有价值的信息．涎腺疾病应用高频声像图进行诊断已得到临床广泛应用．由于恶性肿瘤血流丰富且有一定的特征,因而用彩色多普勒血流显像（CDFI）为涎腺腺体良恶性肿瘤的鉴别诊断提供了重要的诊断依据． 相似文献
3.
CDFI(彩色多普勒血流显像)是UCG(超声心动图)诊断中的必要环节。先来回顾一下CDFI与B型超声显示的关系:CDFI的发射过程与普通B超相似,但接收时有所不同,提取的信号被分为两路,一路经放大器处理后按回声强弱形成二维黑白解剖图像;另一路对扫描线全程作多点取样,进行多普勒检测。显示血流频移信号,信号经自相关技术处理。并用红、 相似文献
4.
目的：回顾性分析了76例乳腺肿块二维声像图和彩色多普勒血流表现，探讨乳腺肿块的诊断和鉴别诊断。方法：76例乳腺肿块经二维超声了解其形态，边界，边缘、内部回声，有无后方衰减及侧方声影等，然后用彩色多普勒检查，观察肿块内部及周边血流情况，结果：在乳腺肿块声像图诊断中，以边界回声特征最为重要，它是鉴别良，恶性肿块的关键，本组大多数恶性肿块形态不规则，边界不清，内部回声较低且不均匀，同时彩色多普勒检查出丰富或散在血液信号，良性肿瘤多表现边界光滑，内回声均匀，彩色多普勒检查大多数无明显的血流信号，结论：二维及彩色多普勒诊断乳腺肿块等符合率较高，且具较大的临床应用价值。 相似文献
5.
目的:探讨甲状腺肿块的二维声像图及彩色多普勒血流图特征与病理类型的对应关系。方法:用二维及多普勒超声诊断仪检测230例甲状腺肿块的声像图特征,并与手术、病理结果进行对比分析。结果:230例甲状腺肿块中经过二维超声检查诊断符合率70.43%(162/230);同时结合CDFI诊断符合率95.22%(219/230)。结论:甲状腺肿块形式多样,表现复杂,甲状腺肿块的声像图特征对判断其病理类型有一定的临床价值,采用二维超声结合彩色多普勒血流图进行综合分析,可提高诊断准确率。 相似文献
6.
目的：运用经阴道彩色多普勒超声,准确有效地诊断及鉴别诊断子宫内膜良性病变。方法：应用LIGIQ400彩色多普勒超声仪,经阴道检查36例患者的子宫内膜厚度、形态及血流状态,并观察病变处血流阻力指数。结果：有效地诊断及鉴别诊断宫颈内膜息肉、黏膜下小肌瘤、内膜增生过长。结论：经阴道彩色多普勒所提供的二维及血流信息能较为准确地诊断子宫内膜良性病变。 相似文献
7.
探讨高频超声在甲状腺结节良恶性诊断中的临床价值.对甲状腺结节良恶性的二维声像图及多普勒血流显像（CDFI）进行分析比较.结果发现,一、在二维声像图上,甲状腺良恶性结节的形态、边界、囊变、钙化、晕环及颈部淋巴结肿大等差异均有统计学意义.二、在多普勒血流显像（CDFI）上,良恶性结节的内部及周边血流差异均有统计学意义.得出高频超声在甲状腺结节的良恶性诊断中具有较高的临床价值,可为临床在甲状腺结节的诊断与治疗中提供重要参考. 相似文献
8.
目的：探讨高频彩色多谱勒血流显像（CDFI）超声对乳腺肿块诊断的临床应用价值。方法：对432例乳腺肿块进行高频彩色多谱勒血流显像（CDFI）超声检查。本文对432例乳腺肿块经高频CDFI检查诊断,并经手术及病理证实的乳腺肿块进行回顾性分析。结果：高频CDFI诊断432例肿块中,实质性410例,囊性22例,良性肿块231例,恶性肿块201例。对肿块的囊性、实质性、混合性的检出率100%。良恶性肿块除18例与手术病理不符合外,总符合率为95.8%（414/432）。高频CDFI超声对乳腺彩色血流的检出率为70.3%（304/432）。良恶性肿块的动脉血流阻力指数有显著差异,P〈0.01.[1]结论：高频CDFI超声检查对乳腺肿块的性质、良恶性鉴别诊断,对临床手术均有指导意义,此检查方法就作为乳腺肿块诊断的首选方法之一。 相似文献
9.
丁久香 《襄樊职业技术学院学报》2011,10(3):33-34
目的探讨彩色多普勒超声诊断宫外孕的特征性依据,提高宫外孕诊断的准确性。方法对临床怀疑异位妊娠患者行多途径（经阴道或腹部）彩色多普勒超声探查子宫附件区域,并与血人绒毛膜促性腺激素（HCG）检查结果比较,确诊宫外孕。结果 100例疑似宫外孕患者的超声检查中,5例因附件区未见异常包块未能确定。另95例均发现附件区包块,其中包块内实质性部分可检测到滋养血流信号57例,频谱为低阻力型;伴有不同程度的盆腹腔积液54例,双侧卵巢可同时显示85例。结论对疑似早期宫外孕的患者进行二维经阴经腹彩超检查,测量包块处滋养动脉血流频谱存在,同时测定血HCG阳性,可以早期诊断宫外孕。 相似文献
10.
目的探讨多普勒与CT在胆道梗阻诊断中的价值.方法60例胆道梗阻患者分别经多普勒与CT检查.结果对梗阻部位的诊断,CT与多普勒无明显差异,在写性方面二者有一定的区别.结论多普勒对胆道结石及良性病变所致梗阻方面优于CT,在胰头病变的诊断中CT较佳. 相似文献
11.
目的：探讨经颅多普勒与彩色多普勒超声联合检查头臂型大动脉炎的价值。方法：应用彩超和TCD检查7例头臂型大动脉炎患者的颅内和颅外动脉．分析二维及血流动力学指标。结果：头臂型大动脉炎病变多位于颅外动脉起始段或近心端（84％）；颅外段动脉狭窄程度与颅内动脉流速呈大致负相关；结论：彩超与TCD联合检查头臂型大动脉炎，对于了解动脉炎所致血管狭窄的分布情况及分析颅外动脉狭窄或闭塞对颅内循环的影响具有重要诊断价值。 相似文献
12.
Increased expression of aquaporin-4 in human traumatic brain injury and brain tumors 总被引：15，自引：0，他引：15
Hu H Yao HT Zhang WP Zhang L Ding W Zhang SH Chen Z Wei EQ 《Journal of Zhejiang University. Science. B》2005,6(1):33-37
Objective:To characterize the expression of aquaporin-4(AQP4),one of the aquaporins(AQPs),in human brainspecimens from patients with traumatic brain injury or brain tumors.Methods:Nineteen hnman brain specimens were obtahledfrom the patients with traumatic brain injury,brain tumors,benign meningioma or early stage hemorrhagic stroke.MRI or CTimaging was used to assess brain edema.Hematoxylin and eosm staining were used to evaluate cell damage,Immunohistochem-istry was used to detect the AQP4 expression.Results:AQP4 expression was increased from 15 h to at least 8 d after injury.AQP4immunoreactivity was strong around astrocytomas,ganglioglioma and metastatic adenocarcinoma.However,AQP4 immunore-activity was only found in the centers of astrocytomas and ganglioglioma,but not in metastatic adenocarcinoma derived from lung.Conclusion:AQP4 expression increases in human brains alter traumatic brain injury,within brain-derived tumors,and aroundbrain tumors. 相似文献
13.
目的探讨肝脏局灶性结节增生(focal nodular hyperplasia,FNH)的影像学诊断价值.方法回顾性分析经病理证实的肝脏局灶性结节增生18例22个病灶的US、CT和MR影像资料.结果US、CT和MR非造影检出率:US13个,占59.1%(13/22);CT检出16个,占72.7%(16/22);MR显示全部病灶,占100%(22/22).US、CT和MR造影检出率:US共检出17个,占77.3%(17/22);CT共检出19个,占86.4%(19/22);MR全部检出,占100%(22/22).正确诊断:US27.3%(6/22),CT40.9%(9/22),MR68.2%(15/22).影像综合正确诊断:90.9%(20/22).结论影像学综合检查能够正确诊断大部分肝脏局灶性结节增生,MRI诊断准确性明显优于CT和US. 相似文献
14.
目的探讨经腹部及经阴道彩色多普勒超声在异位妊娠诊断中的临床价值。方法经腹部及经阴道彩色多普勒超声检查160例异位妊娠患者。结果 160例宫外孕,经手术证实输卵管妊娠129例,宫颈妊娠8例,卵巢妊娠8例,均与超声诊断相符。5例超声诊断为腹腔妊娠,其中4例手术证实为卵巢妊娠,4例超声诊断为残角子宫妊娠,3例手术证实为输卵管间质部妊娠,子宫肌壁间妊娠1例,5例超声初次检查为阴性,再次复查诊断为异位妊娠,超声诊断符合率90.6%。结论经腹及经阴道彩色多普勒超声图像直观、方便、安全,可以多次复查而无创伤性,联合运用为超声诊断异位妊娠提供更多重要的参考信息。 相似文献
15.
Geng Y Shi GH Jiang Y Xu LX Hu XY Shao YQ 《Journal of Zhejiang University. Science. B》2005,6(1):22-27
Objective: To investigate the role of 99mTc-TRODAT-1 SPECT in diagnosis and assessing severity of idiopathic Parkinson's disease (PD). Methods: Thirty-eight patients with primary, tentative diagnosis of PD and eighteen age-matched normal controls were studied with 99mTc-TRODAT-1 SPECT imaging. The regions of interests (ROIs) were drawn manually on cerebellum (CB), occipital cortex (OC) and three transverse plane slice-views of striatums, the semiquantitative BG (background)/[(OC CB)/2] were then calculated. Results: A lower uptake of 99mTc-TRODAT-Ⅰ in striatums were displayed in thirty-six out of thirty-eight PD patients by visual inspection, compared to controls. In twenty-four PD cases with HYS (Hoehn and Yahr scale) stage I, a greater loss of DAT uptake was found in striatum and its subregions contralateral striatum to the affected limbs than in the same regions of the controls, although the striatal uptake was bilaterally reduced. Using Spearman correlation analysis showed that the reduction of the uptake ratios significantly correlated with the UPDRS in striatum and all its subregions in the PD group (P＜0.05), a similar change was also found in the putamen by using the rating scale of Hoehn and Yahr (P＜0.05).However, analysis of variance (ANOVA) did not show any relationship between the decreasing uptake of 99mTc-TRODAT-1 and increasing severity of PD patients, although the specific uptake of 99mTc-TRODAT-Ⅰ was continuously decreased in the striatum by visual inspection with the progress of PD from HYS stage Ⅰ to Ⅲ. Conclusion: 99mTc-TRODAT- 1 SPECT imaging may serve as a useful method for improving the correct diagnosis of PD. In assessing the role of99mTc-TRODAT- 1 SPECT in disease severity of PD, UPDRS can offer a comprehensive index, although the Hoehn and Yahr assessment may be available in part. 相似文献
16.
The diagnostic value of virtual colonoscopy versus colonoscopy was compared in detection of colorectal neoplasia. Virtual
colonoscopy was performed on 29 patients with suspected colorectal diseases, Results were compared with colonoscopy for each
case. Virtual colonoscopy was successfully performed on each patient. All patients tolerated virtual colonoscopy well, had
no complications. All colorectal malignance were identified both by virtual colonoscopy and colonoscopy. Twenty-five polyps
were detected with colonoscopy, whereas only 16 polyps were defined by virtual colonoscopy. Detection rates of polyps greater
than 1.0 cm, between 0.5–0.9 cm and less than 0.5 cm in size were 90%, 62.5% and 28.6% respectively. Virtual colonoscopy is
fast, minimally invasive and well tolerated. This technique is a valuable clinical method in diagnosis of colorectal malignance
and polyps larger than 0.5 cm in size. 相似文献
17.
Objective:To examine the values of endoscopic ultrasonography(EUS) on diagnosis and treatment of esophageal hamartoma.Methods:We compared and analyzed various kinds of imaging examinations such as barium esophagram,contrast-enhanced computed temography(CT)and conventional gastroscopy in retrospectively reviewing the clinical data of an esophageal hamartoma patient seen in our clinic in the First Affiliated Hospital,School of Medicine,Zhejiang University,Hangzhou,China.Having received various imaging examinations,this patient was finally diagnosed with esophageal hamartoma and underwent gastroscopic resection of hamartoma with the diagnostic information obtained from EUS.The patient had been regularly followed up for 13 months after treatment.Results:Barium esophagram,CT and conventional gastroscopy detected the lesion,but were unable to distinguish it from conlmon esophagopolypus and other submucosal lesions,and unable to determine etiopathogenisis.EUS detected the hamartoma and identified its intemal structure,echo,exact size,depth of invasion,origin and the relationship between adjacent tissues and organs,differentiating the lesion from other submucosal tumors and clearly defining the diagnosis.EUS-guided fine needle aspiration(FNA) also helped to identify the etiological diagnosis.Conclusion:EUS was superior to other imaging means in diagnosis and treatment of hamartoma. 相似文献
18.
Sun CX Meng XL Xie SN Yu Y Yang HJ Wu B 《Journal of Zhejiang University. Science. B》2011,12(7):575-581
A modified hemilaminectomy was introduced in an attempt to explore the operative techniques and the values of the limited
approach to spinal cord tumors. Forty-five consecutive patients with intradural extramedullary lesions, who underwent modified
hemilaminectomy, were studied retrospectively. The intraspinal tumors were removed via the limited bone window with a 3.3-cm
mean length (range: 2.0–6.5 cm) and a 1.2-cm mean width (range: 0.6–1.5 cm), in which the inner parts of the medial and lateral
laminae were mostly undercut for wider view. Spinal lesions were cervical in 21 cases, thoracic in 12 cases, lumbar in 10
cases, and multiple in 2 cases. Forty-three cases were completely excised via hemilaminectomy alone. Two subjects with dumbbell
neurinoma underwent two-stage tumor removal via anterolateral cervical approach following hemilaminectomy. With respect to
neurological status, the percentage of good Frankel scale (D+E grade) was markedly improved from 22.2% on admission to 93.3%
at follow-up. At the median 26-month follow-up evaluation by magnetic resonance imaging (MRI), none of the subjects showed
spinal deformity or instability. By preserving musculoligamentous attachments and posterior bony elements as much as possible,
the modified approach is minimally invasive and may be routinely used to remove intradural and extramedullary tumors, especially
in patients with meningiomas and neurinomas. 相似文献
19.
目的：探讨Skp2蛋白表达与上皮性卵巢癌发生、发展及预后评价的意义。方法：采用免疫组化法检测15例卵巢上皮性良性肿瘤、10例卵巢上皮性交界性肿瘤及58例上皮性卵巢癌中Skp2蛋白的表达情况。结果：Skp2在卵巢上皮性良性及交界性肿瘤中的表达均为阴性，而在上皮性卵巢癌中高表达，阳性率为48．28％（28／58），Skp2在中低分化组、Ⅲ／Ⅳ期组及有淋巴结转移组分别高于高分化组（P〈0．01）、Ⅰ／Ⅱ期组（P〈0．01）及无淋巴结转移组（P〈0．01）。在不同年龄及组织类型的卵巢癌中表达无显著性差异。结论：Skp2在上皮性卵巢癌中表达，表达水平越高提示预后越差。 相似文献