多层螺旋CT对主动脉夹层的诊断价值

目的探讨多层螺旋CT(MSCT)对主动脉夹层的诊断价值。方法回顾性分析了经手术和随访证实的21例主动脉夹层患者的MSCT表现。结果诊断符合率为100%,均能辨别真假腔;可以清楚显示主动脉分支受累及情况及显示破口位置。结论 MSCT对主动脉夹层诊断及随访有着重要的价值,是首选影像学检查方法。     

磁共振成像对主动脉夹层的诊断价值(附22例报告)

目的：探讨磁共振成像常规自旋回波(SE)序列与心电门控MBI电影检查对主动脉夹层的诊断价值。方法：搜集经手术证实的主动脉夹层病例22例，其中男17例，女5例。所有病例均行常规自旋回波(SE)序列和心电门控MRI电影检查。分析磁共振成像检查对主动脉夹层的显示能力。结果：22例常规SE序列和心电门控MRI电影检查对夹层隔膜的显示均为100％，但对隔膜撕裂口的显示，心电门控MRI电影检查显示较好，为86、3％(19／22)，而常规SE序列显示不满意。结论：磁共振成像检查作为一种无创伤的影像检查方法，对主动脉夹层的诊断有其优越性，能敏感地显示夹层隔膜、辨别真腔假腔，并能利用心电门控MRI电影检查很好地显示隔膜撕裂口，具有重要的诊断价值，为临床手术方案的选择提供很大的帮助。     

低场强MRI对主动脉夹层的诊断价值

目的 评价低场强磁共振成像对主动脉夹层的诊断价值。方法 对16例主动脉夹层在低场强MRI自旋回波（SE）序列和梯度回波（GRE）表现进行回顾性分析总结，其中，6例经手术病理证实。结果 16例均能清晰显示病变的范围、夹层起始部位、内膜片、真假腔，6例假腔内显示血栓。结论 低场强MRI作为一种无创性检查能对主动脉夹层作出准确及时的诊断。     

主动脉夹层的超声心动图诊断与磁共振影像诊断的比较

 目的探讨经胸超声心动图(TTE)、经食管超声心动图(TEE)对主动脉夹层诊断价值,并与磁共振影像(MRI)进行比较.方法对21例经手术证实的主动脉夹层患者影像资料进行分析,对照手术结果,评价超声心动图(CDE)诊断主动脉夹层及其并发症的准确性,并同磁共振影像(MRI)诊断结果进行比较.结果CDE、MRI对主动脉夹层的诊断率分别为95.2%、90.5%.CDE对诊断主动脉瓣损害,显示心腔扩大、心功能降低、心包腔积液等心脏整体情况优于MRI.MRI对内膜破口及主动脉分支受累的诊断优于CDE.结论CDE对主动脉夹层的诊断具有较高的临床应用价值,对主动脉夹层的诊断敏感性与MRI相似,联合应用TTE、TEE、MRI检查有利于全面估计疾病情况,从而为临床医生提供准确而全面的信息.     

MSCT增强检查对主动脉夹层的诊断价值

为探讨多层螺旋CT（MSCT）增强检查对主动脉夹层的诊断价值,收集经临床及CT或MRI或超声确诊的50例主动脉夹层患者临床资料,分析如下。     

CT和MRI对口腔和口咽部病变的诊断价值

目的：探讨CT和MRI对口腔及口咽部病变的诊断价值。方法：回顾性分析63例经病理及细胞学证实的口腔口咽部病变的CT、MRI资料,其中恶性肿瘤40例,良性肿瘤18例,感染性病变5例。结果：40例恶性肿瘤中,CT检查24例,MRI检查16例,除各有一例浅表型溃疡未能显示外,其余病灶及范围均较清晰显示,两者的区别在于MRI显示肿瘤侵犯邻近结构及深部组织方面优于CT;两者在显示良性病变的大小方面与手术结果相同。结论：CT及MRI对口腔口咽部病变的诊断有重要价值,MRI稍优于CT。     

主动脉夹层CT与MRI临床价值

目的:分析MRI(磁共振成像方法)和螺旋CT诊断AD(主动脉夹层)的影像特征,总结2种技术的临床应用价值。方法:回顾分析手术或临床证实的20例AD的MRI、螺旋CT表现。结果:CT和MRI两种检查手段诊断AD的敏感性与特异性都较高,可以不同程度的显示AD范围、分型、真假腔、内膜片、主动脉扩张、分支血管受累等情况。结论:对疑有AD患者进行MRI和CT检查,两种技术的显示相似,但是内膜片、附壁血栓、内膜破口、壁内水肿以及主动脉整体及分支受累的显示MRI优于CT,对内膜及主动脉壁钙化和急危重者的检查CT优于MRI。     

主动脉假性动脉瘤的影像诊断

目的：探讨主动脉假性动脉瘤的影像表现，评价MRI的诊断价值。方法：报道5例经手术证实的主动脉假性动脉瘤的影像所见，MRI检查4例，彩超检查3例，CT检查2例和主动脉造影1例。结果：胸、腹主动脉假性动脉瘤分别为3例和2例，假性动脉瘤位于主动脉轮廓外。彩超显示瘤体与主动脉有双向血流。CT和主动脉造影表现层状密度瘤体、早期强化和显影。MRI表现假性动脉瘤壁厚薄不均和信号不均质，均有破裂口。GRE显示经主动脉狭窄破裂口向瘤腔内喷射高信号血流。结论：MRI对假性动脉瘤的诊断有重要价值。     

SE序列结合电影MRI诊断主动脉夹层

目的 探讨 SE序列结合电影MRI对主动脉夹层的诊断价值。资料与方法 搜集主动脉夹层17例．所有病例均行MR SET1WI扫描，其中10例加作电影MRI，分析其MRI表现。结果 17例中，Ⅰ型8例，Ⅱ型5例，Ⅲ型3例。SE序列和电影MRI均清楚地显示了主动脉双腔、内膜片。SE序列中5例显示主动脉破口，电影MRI检查10例中，6例显示了主动脉破口。结论 在常规SE序列基础上，结合电影MRI是诊断主动脉夹层的较好方法，能为临床提供更多的信息。     

MRI在主动脉夹层诊断中的应用价值

目的：探讨磁共振技术在诊断主动脉夹层的应用价值。方法：通过对24例主动脉夹层的MRI影像分析,并与CR对照,结果：MRI在破口位置,内膜片及附壁血栓的显示皆优于CT,而在真假腔显示上两者相近。结论：MRI是诊断主动脉夹层的主要检查方法之一。     

The role of interventional radiology in trauma

Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient.In all hospitals,regardless of size,the Interventional Radiologist must consider their relationships with the trauma service in order to     

Diagnóstico ecográfico del neumotórax

The ultrasonographic diagnosis of pneumothorax is based on the analysis of artifacts. It is possible to confirm or rule out pneumothorax by combining the following signs: lung sliding, the A and B lines, and the lung point. One fundamental advantage of lung ultrasonography is its easy access in any critical situation, especially in patients in the intensive care unit. For this reason, chest ultrasonography can be used as an alternative to plain-film X-rays and computed tomography in critical patients and in patients with normal plain films in whom pneumothorax is strongly suspected, as well as to evaluate the extent of the pneumothorax and monitor its evolution.     

Carbohydrate Supplementation during Exercise: Does It Help? How Much is Too Much?

KEY POINTS· Carbohydrate intake during exercise can delay the onset of fatigue and improve performance of prolonged exercise as well as exercise of shorter duration and greater intensity (e.g., continuous exercise lasting about 1h and intermittent high-intensity exercise), but the mechanisms by which performance is improved are different.     

The acutely limping child

Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.     

磁共振DWI和动态增强鉴别颅底脊索瘤和侵袭性垂体瘤的应用

目的 探讨磁共振扩散加权成像(DWI)和动态增强在颅底脊索瘤和侵袭性垂体瘤(IPA)鉴别诊断中的应用价值.方法 搜集经手术病理证实且影像学有鞍区破坏的颅底脊索瘤患者15例、向鼻咽部侵犯的IPA患者20例.测量二者的表观扩散系数(ADC)值,绘制受试者工作特征曲线(ROC),分析动态增强曲线的类型,统计达峰时间(TTP)、增强峰值(EP)和最大对比增强率(MCER),分析各个参数在鉴别诊断中的价值.结果 颅底脊索瘤的ADC值为(1.274±0.07)×10-3mm2/s,高于IPA ADC值(0.672±0.03) ×10-3 mm2/s(P ＜0.001),ADC阈值为0.964×10-3mm2/s时,ROC曲线下面积为0.997,敏感度为93.3％,特异度为100％.颅底脊索瘤时间-信号强度曲线(TIC)Ⅰ型14例,TICⅢ型1例,此例TICⅢ型者TTP约40 s;IPA TIC Ⅰ型7例,TICⅢ型13例.颅底脊索瘤和IPA的EP、MCER差异均有统计学意义(P ＜0.001).结论 ADC值和TIC的类型及其相关参数(EP,MCER)有助于颅底脊索瘤和IPA之间的鉴别.     

Do Balance Board Training Programs Reduce the Risk of Ankle Sprains in Athletes?

Introduction Ankle sprains are the most common musculo-skeletal injury that occurs in athletes,particularly in sports that require jumping and landing on one foot such as soccer,and basketball(1-4).These injuries often result in significant time loss from participation,long-term disability,and have a major impact on health care costs and resources(5-8).     

Treatment of intrahepatic arteriovenous fistula in hepatocellular carcinoma with N-butyl-2-cyanoacrylate

Primary hepatocellular carcinoma (HCC) continues to be one of the most common malignancies with an incidence of approximately one million cases per year and a dismal prognosis; some authors have reported a median survival of 1 ～ 2 months after diagnosis. Although surgery remains the only hope for cure, few patients are candidates[1,2].     

U50,488H对正常及缺氧心肌细胞L型钙电流的作用

目的 探讨心脏阿片受体和β-受体相互作用的机制。方法 采用全细胞膜片钳技术,观察U50,488H(β-阿片受体选择性激动剂)对正常和缺氧心肌细胞L型钙电流的作用。结果 U50,488H剂量依赖性(0．1～100μmol／L)抑制正常心肌细胞的L型钙电流及异丙肾上腺素(0．1μmol／L)激动的钙电流,而细胞缺氧后,这一抑制作用减弱;U50,488H对Forskolin(10μmol／L)激动的L型钙电流无明显影响。结论 β-阿片受体对β-受体信号的负性调节作用在细胞缺氧后减弱,其作用位点可能发生于β-受体与腺苷酸环化酶环节之间。