CT定位扫描像的使用及价值

定位扫描像(Scout view或称Scanogram，以下简称定位像)有重要价值，操作者可根据定位像选择机架的倾斜角度．并可在定位像上用参考线标出要扫描的位置、角度及层厚，以供医生分析提供准确可靠定位依据。CT扫描常规应先定位扫描，而有的医院CT科(室)在进行CT扫描时未先扫描定位像，或CT片上未照定位像，给诊断及定位带来麻烦，为此笔者就定位像的价值进行探讨。     

乳腺疾患的CT扫描价值

目的：通过对行乳腺ＣＴ扫描的资料进行分析,探讨乳腺疾患的ＣＴ扫描价值。材料和方法：对１０例正常乳腺行常规平扫,２２例乳腺疾患均患均行增强前后薄层扫描。结果：２２例乳腺疾患中,乳腺小叶增生８例,急性乳腺炎２例乳腺脓肿４例,乳腺囊肿３例,乳腺癌５例,手术证实１０例。讨论：乳腺疾患的ＣＴ扫描价值在于对良恶病变鉴别,指导临床手术及ＣＴ扫描价值在于对良恶性病变鉴别,指导临床手术及地下的穿刺治疗有重要意义。     

头部外伤的CT扫描体会

头部外伤者，临床多以颅脑、上颌窦，眼眶等部位，申请CT检查。在实际操作过程中，特别是头部严重外伤的CT扫描，笔者认为是以临床申请单的扫描部位为重点，适当改变扫描范围或局部特殊扫描以及图像处理技术的应用，能提高扫描效率，缩短患者的CT受检时间，降低X线的辐射剂量。     

喉癌的薄层CT扫描

喉癌的薄层ＣＴ扫描郭德安林鹏祁吉喉癌为较常见的肿瘤，其诊断和治疗一直受到重视。为评价ＣＴ扫描在喉癌诊断中的价值，我们对３０例喉癌薄层ＣＴ影像进行了分析。资料和方法本组３０例喉癌均经手术及病理证实。其中男２６例，女４例；年龄４５～８１岁，平均６０．３岁...     

肝脏肿瘤的动态CT扫描

Dynamic CT manifestations in 44 cases of hepatic tumors proved by pathology were reviewed. 30 were hepatoma, 6 metastatic tumor, 7 cavernous hemangioma and 1 adenoma. 50 ml of contrast medium were administered as a bolus injection, and scanning was performed at 15, 25, 60, 120 and 300 sec after injection. The tumor enhancement patterns were divided into 3 types based on time-density curve. Type 1 manifested rapid and prolonged marked tumor enhancement; Type 2 was characterized by a rapid rise followed by a rapid decline in tumor density; In type 3 there was no significant change over time in density of the tumor. All cavernous hemangiomas belonged to type 1. Type 2 and 3 were not specific. Parafocal enhancement which occurred in 83.3% of primary hepatic carcinoma in this article and without false positive cases was considered by the authors to be pathognomonic of hepatoma. Evaluation was also made of dynamic CT in treatment planning of hepatic tumors.     

CT技术的进步革新：CT透视与实时螺旋扫描CT

本介绍了两项ＣＴ应用新技术：ＣＴ透视与实时螺旋扫描，在接近０．６ｓ延迟时间后，ＣＴ图像以６帧／ｓ的速度显示，能达实时观察目的。ＣＴ透视能监视穿刺及活检操作过程，实时螺旋扫描能在扫描期间评价造影增强的程度、选择扫描时机并估计扫描范围。这两项技术很有价值，并期望成为将来ＣＴ应用的重要部分。