节细胞神经瘤的CT、MRI诊断

目的 探讨CT和MRI在诊断节细胞神经瘤中的价值.方法 回顾性分析19例经病理证实的节细胞神经瘤患者的CT和MRI影像学表现及临床资料,其中15例行CT增强扫描,4例行MRI扫描(3例增强).结果 所有病灶均为单发.1例位于颈部,7例位于后纵隔,3例位于腹膜后间隙,8例位于肾上腺.边界均清楚,形态多呈椭圆形或不规则形.CT平扫呈均匀或不均匀低密度,动脉期无明显强化,静脉期呈渐进性不均匀强化.4例病灶内见斑点状、结节状钙化.MRI表现为T1WI低信号,T2WI不均匀高信号为主,增强后不强化或轻度强化.2例病灶内呈现"漩涡征".结论 节细胞神经瘤的生长方式及影像学表现具有一定的特征性,CT延迟增强及MRI扫描对其诊断和鉴别诊断有很大的价值.     

肾上腺节细胞神经瘤的影像学表现

目的探讨肾上腺节细胞神经瘤的影像学表现,以提高该病的诊断准确性.资料与方法回顾性分析15例经手术病理证实的肾上腺节细胞神经瘤的影像特点.结果15例肾上腺节细胞神经瘤中,11例行 CT 平扫及增强检查, CT 平扫8例呈均匀低密度,3例呈不均匀低密度;7例病灶内可见钙化,以散在点状或小斑块状钙化为主;增强扫描后2例病灶未见明显强化,9例病灶表现为不均匀轻、中度进行性强化,2例增强后可显示包膜.5例行 MRI 检查,病灶呈稍长 T1不均匀长 T2信号,反相位无信号减低,DWI 呈等低信号,4例增强后呈渐进性轻、中度强化,1例表现为较明显的不均匀团块状强化,4例T2WI 及增强后可显示完整包膜.结论肾上腺节细胞神经瘤一般表现为渐进性轻、中度强化,CT 可见散在点状钙化,MRI 可清晰显示包膜及内部组织成分,二者结合可对大多数病变作出正确的术前诊断.     

节细胞神经瘤的影像诊断及病理分析

目的探讨CT及MRI在诊断节细胞神经瘤中的价值,旨在提高诊断的准确率。方法收集并分析30例节细胞神经瘤患者的CT及MRI影像与临床资料,并与病理结果进行对照。结果29例为单发病灶,另1例位于颈1/2椎管内病灶为双侧发病。后纵隔12例,椎管内外5例,后腹膜3例,肾上腺8例,淋巴结2例。CT平扫呈均匀或不均匀性低密度影,低于邻近肌肉密度,增强扫描动脉期病灶轻度强化或无强化,静脉期及延迟期可见持续性不均匀强化。6例肿瘤内见弧形、斑点状钙化。MRI平扫T1WI呈低信号,T2WI呈稍高/高信号为主,增强后呈轻至中度渐进性强化。结论节细胞神经瘤的CT和MRI表现具有一定特征性。当发生于后纵隔、腹膜后、肾上腺、椎管内外及淋巴结等部位时又具有相对的特异性,了解这些共性与个性,对进一步提高该病诊断的准确性非常有价值。     

肾上腺节细胞神经瘤的CT、MRI表现及病理对照

目的：总结分析肾上腺节细胞神经瘤的CT和MRI表现,提高对本病的认识。方法：回顾性分析经手术病理证实的19例肾上腺节细胞神经瘤患者的CT和MRI表现。15例患者行CT平扫及增强扫描,5例患者行MRI扫描,其中l例患者同时行CT和MRI检查。结果：19例病灶均为单发,位于右侧肾上腺者14例（73．6％）,左侧肾上腺者5例（26．3％）。病灶最小者为2．0cm×2．0cm,最大者为10cm×7．0cm。肿瘤边界清楚,CT平扫密度低于肌肉组织,CT值20～30HU,增强扫描动脉期无明显强化,静脉期、延迟期呈轻度强化。2例（10．5％）肿块边缘见点状钙化。5例行MRl扫描的病例中,病灶T1wI呈低信号,T2wl呈高或稍高信号,增强扫描动脉期病灶无明显强化,静脉期、延迟期呈轻度强化。结论：CT、MRI能很好地显示肾上腺节细胞神经瘤的影像学特点,并能清晰显示病灶与周围组织结构的关系,有助于和肾上腺其他病变的鉴别。     

肾上腺节神经细胞瘤CT、MRI的诊断价值

目的分析肾上腺节细胞神经瘤的影像学表现,以提高该病的诊断准确性。方法回顾性分析8例经手术病理证实的肾上腺节细胞神经瘤的影像特点。结果 8例均为单发,位于右侧5例,左侧3例,CT平扫多呈低密度,其中合并钙化3例,CT增强多呈轻中度渐进样不均匀强化。MRI平扫多呈不均匀长T2WI信号影,可见‘漩涡征’,T1WI多较均匀,动态增强扫描呈不均匀轻中度强化。CT及MRI均表现为病变呈钻孔样生长,可见‘伪足征’,相邻血管、器官受压推移而不侵犯。结论肾上腺节神经细胞瘤一般表现为渐进样轻、中度强化,CT可见散在点状钙化,MRI可清晰显示包膜及内部组织成分,二者结合可对大多数病变做出正确的术前诊断。     

小儿外周性节细胞神经瘤的影像表现与病理对照分析

目的:分析小儿外周性节细胞神经瘤的影像表现特征,以提高诊断准确性。方法:回顾性分析24例小儿外周性节细胞神经瘤影像学资料,并与病理结果进行对照。术前19例CT平扫与增强,7例MRI平扫与增强,其中2例同时做了CT和MRI检查。结果:24例外周性节细胞神经瘤中位于腹膜后10例,肾上腺8例,后纵隔5例,颈部1例。均为单发病灶,边界清楚,圆形或类圆形22例,不规则形2例。病灶平均直径7.9cm,CT平扫为均匀或不均匀低密度,4例肿瘤内出现点状或条状钙化。增强后轻度强化或不均匀条片状强化,4例延迟后进行性增强。T1WI表现为均匀或不均匀低信号,T2WI表现为均匀或不均匀高信号,其中1例内见曲线形低信号灶。强化方式与CT相似。肿瘤推移和包绕血管但不侵犯血管。结论:CT和MRI平扫及增强扫描能较好地显示节细胞神经瘤的内部结构和影像学特点,反映病灶的病理特征,有助于与其它病变的鉴别。     

节细胞神经瘤的CT和MRI诊断

目的：分析节细胞神经瘤的影像表现特点,提高节细胞神经瘤影像诊断的准确性。方法：搜集经手术病理证实的21例节细胞神经瘤的CT和MRI资料,回顾性分析病灶的影像特点,并与组织病理学特征相对照。结果：所有病例均为单发病灶。4例位于后纵隔,9例位于肾上腺,8例位于腹膜后间隙,病灶平均大小约4.2cm,CT平扫为均匀或不均匀低密度,T1WI表现为不均匀低信号,T2WI表现为不均匀高信号,增强后不强化或轻度强化,延迟后可进行性增强,肿瘤包绕血管但管腔不狭窄,5例肿瘤内出现点状或条状钙化。结论：CT和MRI平扫及增强扫描能较好地显示节细胞神经瘤的内部结构和影像学特点,反映病灶的血供特点和病理特征,有助于其它病变进行鉴别。     

节细胞神经瘤的CT、MRI表现与病理对照分析

目的 分析节细胞神经瘤的CT与MRI表现以及与病理的对照.方法 回顾性分析经手术病理证实的11例节细胞神经瘤的CT与MRI表现及临床病理资料,11例全部行CT检查,其中4例同时行MRI检查.结果 11例节细胞神经瘤大小范围在3cm×4cm×4cm～6cm×7.8cm× 8.5cm之间.肿瘤形态表现为边界清楚的椭圆形肿块,亦可呈不规则形,沿冠状轴生长,可对邻近大血管包绕1/2以上.CT平扫表现为水样至肌肉样密度,多表现低密度,其内散在点状或结节状钙化,不增强或轻度增强居多.MRI T1WI为低信号,T2WI为不均匀混杂信号,但以高信号为主;动态增强扫描中,肿瘤早期不强化,并呈逐渐强化的特征,肿瘤包膜可强化.结论 节细胞神经瘤的CT与MRI表现有一定特征性,并与病理中肿瘤富含大量黏液基质呈相关性.     

肾上腺外节细胞神经瘤的CT和MRI特征

目的 探讨肾上腺外节细胞神经瘤的CT和MRI特征,提高对该病的认识.资料与方法 回顾性分析8例经病理证实的肾上腺外节细胞神经瘤的CT和MRI表现,并与组织病理学特征作对比.结果 8例肾上腺外节细胞神经瘤发生于脊柱和脊柱旁区,圆形2例,伴足突的不规则形6例;7例边界完全清楚,1例部分边界清楚;5例CT均表现为均匀低密度,3例增强扫描呈轻-中度强化,2例肿瘤内可见强化线条影.5例MRI T1WI表现为稍低、等信号,T2WI呈不均匀高、显著高信号,增强后呈中等度明显强化,3例肿瘤内可见典型“漩涡征”.肿瘤镜下表现具有特征性,为黏液基质背景下大量梭形细胞及散在的或巢状分布的神经节细胞.免疫组化:S100(+),NF(+),Syn(+),CgA(+).结论 肾上腺外节细胞神经瘤好发部位为脊柱及脊柱旁区,CT和MRI表现具有一定的特征性.     

节细胞神经瘤的CT和MRI诊断

目的 通过分析节细胞神经瘤的影像学表现,提高对该病诊断的准确性.方法 回顾性分析17例经手术病理证实的节细胞神经瘤的影像学特点.结果 17例肿瘤中,4例位于纵隔,3例位于肾上腺,7例位于腹膜后间隙,2例位于颈部,1例为纵隔及腹膜后多发;肿瘤最大者约14.9cm×13.5cm×11.2cm;肿瘤边界清楚,其中8例表现为类圆形,9例形态不规则,其中2例呈嵌入性生长.17例CT平扫表现为低密度,低于肌肉密度,8例可见散在点状或小斑块状钙化,T1WI呈低信号,T2WI中高混杂信号;增强扫描一般为条片状不均匀轻中度进行性强化.结论 节细胞神经瘤的CT和MRI表现有一定的特征,正确认识其影像表现,可对大多数病例做出正确诊断.     

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.     

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     

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).     

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.     

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.     

High Intensity Interval Training:New Insights

KEY POINTS ·High-intensity interval training(HIT)is characterized by repeated sessions of relatively brief，intermittent exercise.often performed with an“a11 out”effort or at an intensity close to that which elicits peak oxygen uptake(i.e.，≥90%of VO2 peak).     

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.     

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].