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[目的]探讨超声造影在肝局灶性结节增生(FNH)的诊断以及与原发性肝癌(PHC)鉴别诊断中的价值。[方法]经病理学检查证实的原发性肝癌22例和肝局灶性结节增生病变16例,采用GE-LOGIQ9彩色多普勒系统,具有CPS(contrast pulse sequence)造影专用程序和造影剂Sonovue进行超声造影成像,造影时记录肝实质及病灶的充填过程、充盈方式及增强程度。[结果]22例原发性肝癌的造影方式均呈典型的快进快退型。16例FNH在动脉期呈强回声,而门脉相呈等回声。在延迟相,15/16例(94%)FNH病灶呈等回声或稍高回声,1/16例(6%)较肝实质回声稍低;11/16例(69%)病灶在门脉和延迟相可见中央瘢痕。[结论]超声造影能清楚显示肝局灶性结节增生和原发性肝癌的造影充填过程及充填方式,在两者的诊断和鉴别诊断中具有重要意义。 相似文献
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目的 探讨肝硬化背景下肝细胞肝癌(HCC)、肝海绵状血管瘤(HCH)的超声造影表现及相关参数。方法 选取143例肝硬化合并肝内结节样病灶患者,将82例肝硬化背景下HCC患者纳入HCC组,61例肝硬化背景下HCH患者纳入HCH组。观察两组患者的超声造影表现,比较两组患者的常规超声特征和超声造影参数,采用受试者工作特征(ROC)曲线及曲线下面积(AUC)分析超声造影各参数对肝硬化背景下HCC的诊断效能。结果超声造影下,HCC组以快进快退、均匀增强为主,部分可见快进慢退和不均匀增强;HCH组以延迟期对比剂无或轻度退出、门脉期向心性填充、动脉期病变周围呈结节样环状强化为主。两组患者病灶边界、内部回声情况比较,差异均有统计学意义(P﹤0.01);HCC组病灶边界以模糊为主,内部回声以低回声、混合回声多见,而HCH组病灶边界以清晰为主,内部回声以高回声多见。HCC组患者的达峰时间(TTP)、平均通过时间(MTT)均明显短于HCH组,峰值强度(IMAX)明显高于HCH组,差异均有统计学意义(P﹤0.01)。两组患者动态血管模式(DVP)曲线特征比较,差异有统计学意义(P﹤0.01);HCC组患者DV... 相似文献
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目的 :比较周围型肝内胆管细胞癌的超声造影与增强磁共振成像(magnetic resonance imaging,MRI)的影像学特点,旨在提高影像学诊断的准确性。方法 :对51例经手术或穿刺病理证实为周围型肝内胆管细胞癌的患者的超声造影和增强MRI表现进行分析和比较。结果 :51例患者共有55个病灶。超声造影显示55个病灶在动脉期均有增强;门脉期有8个呈现为等回声,47个呈现为低回声;延迟期55个病灶均呈现低回声。增强MRI显示55个病灶在动脉期均有增强;门脉期和延迟期延迟强化的病灶有44个,11个病灶呈现为低回声。超声造影显示有42个(76.4%)病灶表现为周边环状增强,13个(23.6%)病灶表现为整体增强,增强过程中有40个(72.7%)病灶表现为"树枝样"向内延伸的增强方式;增强MRI显示40个(72.7%)病灶表现为周边环状强化,15个(27.3%)病灶表现为整体强化。超声造影的特征性表现为动脉期病灶周边环状增强,并呈"树枝样"向内延伸,达峰值时大多数病灶表现为不均匀增强;增强MRI的特征性表现为动脉期周边环状增强,而门脉期和延迟期表现为延迟强化。以"快进快出"、周边环状增强和(或)"树枝样"增强作为周围型肝内胆管细胞癌超声造影的特征,其出现率为70.9%(39/55);而以动脉期周边环状增强和延迟增强作为增强MRI的特征性表现,其出现率为69.1%(38/55)。超声造影与增强MRI的特征性影像出现率差异无统计学意义(P=1.000)。结论 :周围型肝内胆管细胞癌的超声造影和增强MRI均有特征性表现,具有较高的诊断价值。 相似文献
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张喜锦 《中华肿瘤防治杂志》2010,17(19)
目的:观察肝转移癌超声造影表现并探讨其临床应用价值.方法: 对38例恶性肿瘤患者肝脏行常规超声检查及低机械指数超声造影检查,对肝内转移性病灶超声造影表现进行分析.结果: 38例肝转移癌患者超声造影动脉相表现,55个(49.11%)病灶为周边环状增强型;41个(36.61%)病灶为整体增强型;11个(9.82%)病灶为不均匀增强型;5个(4.46%)病灶为相对无增强型.延迟相为112个(100.00%)病灶呈边界清晰的低回声,21 例(55.26%)患者发现新病灶,其中直径<10 mm的占51.11%.结论: 肝转移癌超声造影有特征性表现,能够明显提高肝转移癌尤其直径<10 mm的微小转移灶的检出率,可为临床筛查、诊断及鉴别诊断提供可靠依据. 相似文献
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目的 评价超声造影(CEUS)对原发性肝癌(PHC)血供增强模式的显像特征,探讨PHC微血管构筑与病理组织学分型的关系。方法 278例329个PHC病灶行CEUS检查并分析其造影增强模式与病理特征的相关性。结果 PHC病灶造影模式:71.7%(236/329)为“快进快出”,13.4%(44/329)为“快进慢出”,7.3%(24/329)为“快进同出”,4.3%(14/329)为“慢进快出”,2.1%(7/329)为“慢进慢出”,1.2%(4/329)为“快进不出”。本组PHC病灶中,90.3%(297/329)为多血供病灶,见于肝细胞性肝癌(HCC);9.7%(32/329)为乏血供病灶,仅见于肝内胆管细胞癌(ICC)。PHC造影灌注填充模式与病灶大小有差异(P<0.05),灌注廓清模式与病灶大小无差异(P>0.05)。CEUS诊断PHC与病理对照,误诊9个病灶,诊断正确符合率为97.3%。结论 CEUS可判定PHC不同血供灌注特征并与病理组织学分型密切相关,对肝癌诊断与治疗具有重要临床价值。 相似文献
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目的:探讨经直肠超声(transrectal ultrasound, TRUS)联合超声造影(contrast-enhanced ultrasound, CEUS)对前列腺低回声病灶良恶性诊断的应用价值。方法:队列研究分析131例患者共167个前列腺原发低回声病灶的TRUS及CEUS声像图特征,依据穿刺病理结果分为前列腺癌(prostate cancer, PCa)组和非PCa组。对各超声特征参数进行单因素及多因素Logistic回归分析,筛选出与低回声病灶良恶性相关的独立预测因子,建立Logistic回归预测模型,绘制受试者工作特征曲线(receiver operating characteristic curve, ROC)比较各单一超声特征参数及联合预测模型对前列腺低回声病灶的诊断效能。结果:前列腺低回声病灶分类情况、血流分级、阻力指数(resist index, RI)、造影模式、强化程度、强化均匀性在两组间差异均有统计学意义(P<0.05)。多因素Logistic回归分析结果显示“污渍”样低回声、“快进快出”与“快出非快进”的造影模式、高增强是预测低回声病灶恶性诊断的独... 相似文献
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Jialing Wu Guang Yang Xiaoqin Qian Rui Hou 《中德临床肿瘤学杂志》2008,7(3):125-127
Objective: By observing the pattern of the focal liver lesions (FLL) in different phases by real time contrast-enhanced ultrasound (CEUS), compared to enhanced CT, investigate the value of CEUS in diagnosing focal liver lesions. Meth. ods: 35 patients with unconfirmed focal liver lesions were studied by contrast agent SonoVue and Technos DU 8 produced by Esaote company. Results: Among the 14 cases of hepatocellular carcinoma (HCC), 10 were typical, presented with early artery enhancement and immediate wash-out. The enhancement patterns of 6 livers metastasis were diverse, including peripheral or entire degree enhancement. The wash-out time in malignant tumors was eadier than other focal liver lesions (P 〈 0.05), appeared as hypoechoic in the portal phase or parenchyma phase. The 6 cases of hemangioma were enhanced centripetally nodular in artery phase and washed out after several minutes. The patterns of different lesions were similar compared to contrast-enhanced CT, without significant statistic differences. Conclusion: The contrast enhanced ultrasound technique can significantly improved the value of diagnosing focal liver lesions. 相似文献
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Objective: By observing the pattern of the focal liver lesions (FLL) in different phases by real time contrast-enhanced ultrasound (CEUS), compared to enhanced CT, investigate the value of CEUS in diagnosing focal liver lesions. Methods: 35 patients with unconfirmed focal liver lesions were studied by contrast agent SonoVue and Technos DU 8 produced by Esaote company. Results: Among the 14 cases of hepatocellular carcinoma (HCC), 10 were typical, presented with early artery enhancement and immediate wash-out. The enhancement patterns of 6 livers metastasis were diverse, including peripheral or entire degree enhancement. The wash-out time in malignant tumors was earlier than other focal liver lesions (P<0.05), appeared as hypoechoic in the portal phase or parenchyma phase. The 6 cases of hemangioma were enhanced centripetally nodular in artery phase and washed out after several minutes. The pattems of different lesions were similar compared to contrast-enhanced CT, without significant statistic differences. Conclusion: The contrast enhanced ultrasound technique can significantly improved the value of diagnosing focal liver lesions. 相似文献
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目的 探讨超声造影对脂肪肝伴实性占位病变的良恶性诊断和鉴别诊断的临床价值。方法 对经病理证实的脂肪肝伴实性占位70例(91个病灶)采用超声造影技术实时观察,并与增强CT进行对照分析。结果 超声造影和增强CT诊断敏感性、特异性、阳性预测值、阴性预测值、准确性分别为97.2%、92.1%、94.5%、96.1%、96.7%和93.4%、94.1%、95.1%、90.8%、94.1%,两者具有较好的一致性,与病理诊断均具有良好的信度(Kappa值分别为0.92、0.86)。结论 超声造影对诊断和鉴别诊断脂肪肝背景下实性占位具有重要的临床价值。 相似文献