螺旋CT机图像传输系统与其外设网络传输线路的改建

通过改建图像传输网络线路,使图像传输系统传输CT图像更加方便、稳定、快捷.     

额窦引流系统的CT解剖特征及价值

目的探讨额窭引流系统的CT解剖特征及价值。方法对17例正常成人颅骨标本行螺旋CT横断位扫描．将原始图像传输到工作站，分别行冠状面和矢状面重建。结果螺旋CT三维成像技术能清楚显示钩突的附着部位和类型，其中在34侧钩突中，纸样板12侧（35．3％），鼻丘气房4侧（11．8％），中鼻甲9侧（26．5％），前颅底6侧（17．6％）．分叉3侧（8．8％）；在额隐窝气房28侧中，终末气房15侧（53．6％），鼻丘气房7侧（25．o％），前筛气房6侧（21．4％）：额窭内气房共30侧，有额气房10侧（33．3％），眶上气房12侧（40．o％），额窦中隔气房即M气房8侧（26．7％）。结论了解额窦引流系统的CT解剖特征，可以为慢性额窦炎术前提供有用的信息。     

脊柱结核的影像学诊断及临床病理分析

研究脊柱结核的影像学诊断价值,并探讨各型脊柱结核的临床病理特点.对156例经临床及病理证实且影像学资料完整的脊柱结核进行回顾性分析,比较其X线(或CR)、CT及MRI的影像学特点及符合率.结果显示①X线(或CR)、CT及MRI对脊柱结核诊断符合率分别为90.5%、96.2%及99.5%.②X线(或CR)、CT及MRI对椎体骨质破坏、椎间隙狭窄的敏感性分别为74.5%、89.9%及96.87%.③对椎旁软组织肿块和腰大肌脓肿、附件破坏及骨性椎管受累的显示,CT优于X线(和CR)片;对早期病变的显示及脊髓受累情况,MRI优于X线(或CR)及CT,有显著差异性(P＜0.01).④对死骨及钙化的显示CT优于X线(或CR)及MRI.认为X线(或CR)检查为诊断脊柱结核的基本方法,但对早期病变的显示有限度;CT显示早期微小的骨质破坏、死骨、脓肿、钙化及脓肿对椎管脊髓压迫明显优于X线;MRI可清晰显示硬膜外脓肿及脊柱后突畸形对脊髓的压迫和脊髓变性情况,尤其是对早期病变的诊断,有较高的敏感性和特异性,但对死骨及钙化不敏感.     

Helical CT in the primary trauma evaluation of the cervical spine: an evidence-based approach

This review provides a summary of the cost-effectiveness, clinical utility, performance, and interpretation of screening helical cervical spine CT for trauma patients. Recent evidence supports the use of helical CT as a cost-effective method for screening the cervical spine in high-risk trauma patients. Screening cervical spine CT can be performed at the time of head CT to lower the cost of the evaluation, and when all short- and long-term costs are considered, CT may actually save money when compared with traditional radiographic screening. In addition to having higher sensitivity and specificity for cervical spine injury, CT screening also allows more rapid radiological clearance of the cervical spine than radiography. Patients who are involved in high-energy trauma, who sustain head injury, or who have neurological deficits are candidates for CT screening. Screening with CT may enhance detection of other potentially important injuries of the cervical region. Received: 17 March Revision requested: 14 April 2000 Revision received: 19 July 2000 Accepted: 19 July 2000     

Hemangioma of bone arising in the ulna: imaging findings with emphasis on MR

An 18-year-old woman presented with left elbow joint pain. Radiographs and computed tomographic scan showed a well-defined osteolytic lesion of the left ulna associated with a honeycomb appearance on the radiographs. Magnetic resonance images showed intermediate signal intensity on T1-weighted images and mixed intermediate and high signal intensities on T2-weighted images. Only the periphery of the lesion enhanced with intravenously injected gadolinium-diethylenetriamine pentaacetic acid. The lesion was curetted to avoid pathologic fracture, and a histologic diagnosis of cavernous hemangioma of bone was made. Hemangioma involving the ulna is rare, but should be included in the differential diagnosis of a radiographic osteolytic lesion with a honeycomb appearance. Received: 17 September 1999 Revision requested: 31 October 1999 Revision received: 10 December 1999 Accepted: 13 December 1999     

Intraosseous microcystic meningioma

Extradural ectopic meningioma is a rare tumor. We report on an example of microcystic meningioma arising in the skull of an elderly woman. Radiological examination revealed a localized osteolytic lesion in the left parietal bone. At surgery, it was discovered that the tumor was located within the skull without any evidence of extraosseous extension. The light microscopic, immunohistochemical and ultrastructural features were consistent with a microcystic variant of meningioma. To our knowledge, this is the first case of an intraosseous microcystic meningioma, and we believe that this type of meningioma should be considered in the differential diagnoses of myxoid bone tumors of the calvarium. Received: 10 January 2000 Revision requested: 21 February 2000 Revision received: 8 March 2000 Accepted: 13 March 2000     

肝细胞癌NF κ-B表达与CT表现的相关性

目的 探讨核因子（NF κ-B）在肝细胞癌组织中的表达与CT影像特点间的关系。方法 收集华西医院有完整临床资料和全肝CT扫描图像并经手术完整切除的肝癌组织标本患者80例,采用免疫组织化学方法染色定量分析癌组织中NF κ-B表达情况和在不同的临床参数中表达的差异;再分别以肿瘤坏死、血供、瘤体直径和瘤周子灶的有无分四组,探讨NF κ-B表达量在不同CT影像特征中有无差异。结果 CT检测80例患者中肝癌细胞核内NF κ-B表达阳性有74例（92.5%）。肝细胞癌NF κ-B表达与临床参数,包括性别、肝炎病史无相关性,瘤体大小与NF κ-B表达无统计学差异。CT检测肿瘤血供、坏死及瘤周子灶的有无与NF κB表达相关（P＜0.05）,富血供肝细胞癌NF κ-B表达较乏血供者明显增高,而瘤体有坏死者较未发生坏死者低,瘤周出现子灶的病例NF κ-B表达也增高,且差异有统计学意义（P＜0.05）。结论 肝癌血供、坏死及瘤周子灶CT影像特点与NF κ-B水平密切相关。瘤体血供丰富、瘤内无坏死、瘤周伴有子灶的肝癌组织NF κ-B表达水平明显增高,NF κ-B表达水平量可能与肿瘤的生物学特性,疾病的转归和预后相关,CT检测可为肝癌的治疗及预防评估提供重要依据。     

浸润型肺结核CT与临床疗效对比分析

目的 评价初治浸润型肺结核患者的临床疗效和螺旋CT影像学特点的对比研究。方法 116例浸润型肺结核患者,采用抗结核治疗,分别在1,2,4,8和12个月进行对比研究。结果 在1,2和4个月的对比研究中,螺旋CT影像学表现的好转情况明显低于临床表现（P〈0．05）,而8和12个月对比结果两者表现相同。结论 CT表现晚于临床症状的转归。说明即使临床结核中毒症状好转或消失,也不应该忽视结核的化学治疗。     

高分辨率CT对耳部复杂骨结构外伤的诊断体会

为了观察耳部复杂骨结构.对36例患者采用HRCT显示耳部外伤骨结构异常,骨性外耳道非常清晰,易于显示骨折线、乳突及鼓室部骨折、听骨脱位、面神经管及岩部骨折等.     

Atorvastatin Reduces Circulating S100A12 Levels in Patients with Carotid Atherosclerotic Plaques - A Link with Plaque Inflammation

Aims: Inflammation is involved in various processes of atherosclerosis development. Serum C-reactive protein (CRP) levels, a predictor for cardiovascular risk, are reportedly reduced by statins. However, several studies have demonstrated that CRP is a bystander during atherogenesis. While S100A12 has been focused on as an inflammatory molecule, it remains unclear whether statins affect circulating S100A12 levels. Here, we investigated whether atorvastatin treatment affected S100A12 and which biomarkers were correlated with changes in arterial inflammation. Methods: We performed a prospective, randomized open-labeled trial on whether atorvastatin affected arterial (carotid and thoracic aorta) inflammation using¹⁸fluorodeoxyglucose positron emission tomography/computed tomography (¹⁸F-FDG-PET/CT) and inflammatory markers. Thirty-one statin-naïve patients with carotid atherosclerotic plaques were randomized to either a group receiving dietary management (n=15) or one receiving atorvastatin (10mg/day,n=16) for 12weeks.¹⁸F-FDG-PET/CT and flow-mediated vasodilation (FMD) were performed, the latter to evaluate endothelial function. Results: Atorvastatin, but not the diet-only treatment, significantly reduced LDL-cholesterol (LDL-C, -43%), serum CRP (-37%) and S100A12 levels (-28%) and improved FMD (+38%).¹⁸F-FDG-PET/CT demonstrated that atorvastatin, but not the diet-only treatment, significantly reduced accumulation of¹⁸F-FDG in the carotid artery and thoracic aorta. A multivariate analysis revealed that reduction in CRP, S100A12, LDL-C, oxidized-LDL, and increase in FMD were significantly associated with reduced arterial inflammation in the thoracic aorta, but not in the carotid artery. Conclusions: Atorvastatin treatment reduced S100A12/CRP levels, and the changes in these circulating markers mirrored the improvement in arterial inflammation. Our observations suggest that S100A12 may be an emerging therapeutic target for atherosclerosis.