Methods : spiral ct ( sct ) scanning technology , digital image transfer and transcription were used to obtain the initial 3 - d data of the upper central incisor 方法：采用螺旋ct扫描、数字影像传输与转录方法，获得中切牙三维形态的原始数据。
The tube is the most expensive and consumable part of in spiral ct . this article analysis usual problems , and introduces some preventive maintenance method 球管是ct中最昂贵的消耗性核心部件。本文简析了球管的一般常见故障,以及对非致命故障的排除方法。
Objective to investigate the spiral ct manifestations and their pathological bases of cavernous transformation of the portal vein ( ctpv ) due to tumor thrombosis in primary hepatic carcinoma ( phc ) 目的探讨原发性肝癌门静脉栓塞后侧支开放的螺旋ct表现及病理基础。
Multi - slice spiral ct has enabled the real volume data acquisition and opened a brand - new window for non - invasive imaging diagnosis . its tremendous advantages have gradually been demonstrated in clinical application 摘要多层螺旋ct实现了真正意义上的容积数据采集，为无创性影像诊断学开创了一个全新领域，其巨大的优越性已逐渐体现在临床应用领域。
Objective to report 16 cases of intracranial aneurysms with calcified vascular wall and study the relationship between vascular calcification and pathogenic mechanism of intracranial aneurysms . methods spiral ct scan , clinical data and serum calcium , phosphate , glucose , lipid , renal function of the 16 patients were studied in retrospect . all aneurysms were clipped , in which 8 were resected after clipping . results the location of aneurysms with aneurismal wall calcification was , on posterior communicating artery in 3 , on middle cerebral artery in 2 , on anterior communicating artery in 2 , on basilar artery in 5 and on basilar artery in 4 . all patients showed normal serum calcium , phosphate , glucose and normal renal function . serum lipid of patients had been elevated . all patients recovered with no significant neurological deficits . conclusion intracranial vascular calcification is an active and regulated process in close relation to atherosclerosis , serum calcium , phosphate , lipid , thyroid , parathyroid function and other factors . intracranial vascular calcification has close relationship with the pathogenesis and management of intracranial aneurysms 目的报告16例瘤壁有钙化的颅内动脉瘤病例的治疗,分析颅内血管钙化与颅内动脉瘤病理发生机制的关系.方法回顾性分析16例瘤壁有钙化的颅内动脉瘤病例的影像学、临床资料及手术治疗.结果瘤壁有钙化的颅内动脉瘤的位置是: 3例位于后交通动脉, 2例位于大脑中动脉, 2例位于前交通动脉, 5例位于椎动脉, 4例位于基底动脉.所有患者血钙、磷酸盐、血糖、肾功能正常. 6例患者血脂增高. 16例患者均行动脉瘤夹闭术,其中8例术中切除动脉瘤,治疗效果良好.结论动脉瘤瘤壁钙化与其病理发生机制有关,常见于巨大或大动脉瘤,瘤壁血管钙化是与动脉粥样硬化、血钙、磷酸盐、血脂、甲状腺、甲状旁腺等因素有关的主动耗能,多因素调控的病理过程
