Bilateral ethmoidal dural arteriovenous fistula: Unexpected surgical diagnosis

Dural arteriovenous fistulae (DAVFs) are infrequent lesions, the most common locations of which are the cavernous, sigmoid and transverse sinuses. The cribiform plate is one of the less frequent sites for DAVFs, where they entail a high hemorrhage risk. Feeding arteries for ethmoidal DAVFs can be uni- or bilateral. However, the draining fistulous system has classically been described as unilateral. The authors report the second case in literature of bilateral ethmoidal DAVF, which is defined as that with bilateral draining veins. The present case was diagnosed only after surgical exploration of both cribiform plates. No preoperative radiological test could detect the presence of a bilateral venous draining system from the ethmoidal DAVF. Possible reasons for that lack of presurgical diagnosis are discussed. Bilateral surgical exploration of the anterior cranial fossa is recommended when dealing with ethmoidal DAVFs, even when they seem to be unilateral on preoperative studies.     

Blood pool inversion volume-rendering technique for visualization of the aortic valve

This brief review focuses on use of an advanced postprocessing volume-rendering technique for cardiac computed tomographic angiography (CTA) called blood pool inversion (BPI). In particular, we focus on the application of BPI in visualization of the aortic valve. Practical tips and tricks about aortic valve imaging with cardiac CTA are given. Topics include optimization of patient preparation and image acquisition; strengths and limitations of standard postprocessing techniques such as multiplanar reconstruction, maximal intensity projection, and minimum intensity projection; and use of advanced volume rendering with BPI for assessment of aortic valve disease.     

3例颈动脉体瘤的CTA及DSA表现

颈动脉体瘤(carotid body tumor,CBT)是一种较少见的副神经节瘤,本研究收集经手术病理证实的3例颈动脉体瘤,分析其CTA和DSA 表现,并评估其诊断价值.     

Diagnostic Accuracy of Coronary CT Angiography for the Evaluation of Bioresorbable Vascular Scaffolds

Objectives

The purpose of this study was to assess the diagnostic accuracy of coronary computed tomography angiography (CTA) for bioresorbable vascular scaffold (BVS) evaluation.

Detection of mesenteric ischemia by means of endoscopic visible light spectroscopy after luminal feeding

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化瘀通脉颗粒干预经皮腔内冠状动脉介入治疗术后再狭窄的临床研究

目的观察化瘀通脉颗粒干预冠心病经皮腔内冠状动脉介入治疗(PCI)术后再狭窄的临床效果。方法将60例冠心病经PCI治疗患者随机分为对照组和治疗组,治疗组31例,对照组29例。对照组按照常规治疗方法治疗,治疗组在对照组药物基础上加服化瘀通脉颗粒治疗。两组疗程均为6个月。结果治疗组总有效率为83.87%,明显高于对照组的62.07%(P0.05)。治疗组中医症状积分降低较对照组更加明显(P0.05)。治疗组心绞痛和临床再狭窄人数明显少于对照组(P0.05);冠脉CTA再狭窄发生人数治疗组也少于对照组(P0.05)。结论化瘀通脉颗粒具有预防PCI术后再狭窄的作用。     

CT三维重建联合肾脏血管造影在经皮肾镜取石术治疗鹿角形肾结石中的应用研究

目的探讨螺旋CT三维重建联合肾脏血管造影(CTA)在经皮肾镜取石术(PCNL)治疗鹿角形肾结石的可行性及临床效果。方法本组34例鹿角形肾结石均行经皮肾镜取石术,观察手术时间、术中失血量、结石清除率。结果全部手术均取得成功,无严重并发症发生。手术耗时1.0～2.5h,平均1.5h。出血量30～300ml,平均112±30ml。总结石清除率91.4%。结论 CT三维重建联合肾脏CTA可提供肾盂肾盏集合系统、肾实质血管分布的清晰图像,并可发现结石和明确结石与肾盂肾盏集合系统的关系,可在术前发现肾动静脉瘘。与静脉尿路造影相比较,三维CT重建更有利于确定经皮肾穿刺的部位及穿刺通道选择。对于鹿角形肾结石,CT三维重建联合肾脏CTA应该成为经皮肾镜取石术前一种常规的影像学定位方法。     

寰椎椎弓根钉内固定通道的三维CT影像学研究

目的利用三维影像学探讨常人寰椎椎弓根钉内固定通道的解剖学基础。方法从本院PACS系统中随机选取60例头颈部CTA枕寰枢复合体无明确异常的影像学资料,进行回顾性三维CT成像。测量相关解剖学数据,以颈椎扩孔器横截面面积(3~5 mm2)为对照,归纳出3种椎弓根类型。结果 60例头颈部CTA三维图像显示寰椎及周围结构清楚,测量出寰椎椎动脉沟底部后弓外径高度男性(4.39±1.16)mm,女性(3.84±0.84)mm,小于常规螺钉直径(3.50 mm)占27.7%;在寰椎椎弓根通道分型中,Ⅰ型68侧,占56.67%,Ⅱ型25侧,占20.83%;Ⅲ型27侧,占22.50%;皮质骨面积比例随通道面积的减小而增大,在各型椎弓根通道都在80%以上。结论寰椎椎动脉沟底部后弓外径高度是制约寰椎椎弓根钉固定的重要因素,而寰椎椎弓根骨性通道的解剖结构特点则影响置钉技术的选择;设计出适应寰椎椎动脉沟底部后弓外径高度的螺钉是非常必要的。     

双源CT前瞻性心电触发技术用于脑血管成像的初步研究

目的 探讨双源Flash Spiral CT前瞻性心电触发序列(step-and-shoot,SAS)模式脑血管成像的图像质量及辐射剂量.方法 将43例临床怀疑脑血管性病变的患者,行前瞻性心电触发序列模式的脑血管造影术( SAS-CTA)扫描,采集期相:应用60％ R-R间期的ECG演示模式,对SAS-CTA做图像后处理,分析评价图像质量评分、统计辐射剂量及优良率.结果 评价SAS-CTA,图像质量评分为4.72±0.50,优良率达97.7％ (42/43),平均有效剂量为(0.216±0.01) mSv,SAS-CTA有效辐射剂量与双能量CTA( DE-CTA)比较降幅达到76.31％.结论 前瞻性心电触发序列模式应用于脑血管成像,可在保证图像质量的同时显著降低辐射剂量.