不典型脑膜瘤一例

患者，女，43岁，因“头昏、头痛6月，双眼视物模糊2月”入院。 入院前6月，无明显原因出现头痛，呈持续性发作，阵发性加剧，无呕吐、四肢抽搐及意识障碍，未引起重视。2月前，其头昏头痛症状加重，并出现双眼视物模糊，当地诊断为“鞍区占位”。

研究肺部低剂量螺旋CT扫描的放射剂量

目的:分析肺部低剂量螺旋CT扫描的放射剂量。方法:收治肺癌患者40例,随机分为甲组和乙组,分别给予常规剂量的螺旋CT扫描和低剂量螺旋CT扫描,对扫描方式和剂量值进行分析。结果:在本次研究中对甲组和乙组的放射剂量、CTDIw、DLP(m GY·cm)、扫描时间、扫描长度、m As等系数进行对比。实践证明,乙组的各项系数明显低于甲组,组间数据对比差异具有统计学意义(P<0.05)。结论:在临床放射诊断中采用低剂量螺旋CT扫描方式,其优势明显。

冠状动脉疾病诊断中放射CT血管造影的临床应用

目的:探讨冠状动脉疾病诊断中放射CT血管造影的应用效果。方法:收治冠状动脉疾病患者79例,随机分为1 mm组和3 mm组。采用放射CT血管造影检查,比较两组检查结果。结果:1 mm组检出小钙化斑块和钙化斑块患者比例显著高于3 mm组(P<0.05)。结论:冠状动脉疾病诊断中放射CT血管造影的应用效果显著。

从“说”开始，锻炼语言修养

说话是一门艺术。小学语文教师不仅要教导学生说话的礼仪，更要教会他们说话的技巧，提高学生的语青修养。

The effect of spherical aberration on temperature distribution inside glass by irradiation of a high repetition rate femtosecond pulse laser

In this paper, we study the effect of spherical aberrations on the light intensity and the temperature distribution in the focal region in a 250-kHz femtosecond laser irradiated Ag^＋-doped borosilicate glass. When a focused beam goes through an interface between air and glass, spherical aberration will result in the separation of the focal point and then cause a clear change of the light intensity distribution along the incident direction. That phenomenon will further influence the longitudinal cross-section temperature distribution in glass. Here we use Ag nanoparticle formation as a marker for establishing temperature distribution and we find that the formation of nanoparticle shows a strong dependence on the temperature field and the detailed precipitation process is also discussed.