Results 11 to 20 of about 986 (148)
胸部CT检查中iDose4迭代重建联合管电流自动调节技术的应用
Zhongguo shiyan zhenduanxue, 2020 计算机断层扫描（CT）技术的发展使得CT机体积更大、分辨率更高、噪音更低,但这也增加了辐射暴露的风险[1]。在快速发展的多层螺旋CT领域,为了提高图像质量、诊断准确性,辐射剂量的问题可能已经被忽视了[2]。近年来,国内外主要医疗公司引入的迭代技术受到了各临床医院的关注,飞利浦2011年引入的第四代迭代技术,即iDose4迭代技术就是其中之一[3 ...
信瑞 +5 more
doaj
, 2007 目的:利用仿真模型研究结肠结节状病灶的特征、CT扫描参数、阅片视窗及仿真成像(CTC)对CT检出病灶的影响。材料与方法:利用仿真材料制造30个结节放置到仿真人的结肠内壁上,结节分别为0.5cm隆起形、0.3cm隆起形、0.2cm隆起形、0.2cm扁平形、0.2cm高密度扁平形,每种结节6个。分别应用方案8.0mm/2.5mm/17.5(层厚/准直/螺距)和方案5.0mm/1.0mm/7.0扫描并CTC成像。对横断面扫描图像分别应用3种视窗阅片。检测不同情况下结节的显示情况。结果:窗宽1000HU,窗中心-
周水添 +4 more
core
Chinese expert consensus on clinical practice of locally advanced gastric cancer invading adjacent organs (2024 edition) [PDF]
Gastric cancer is one of the most common malignant tumors, and over 70% of patients were diagnosed as advanced stage at the first visit in our country. For patients with locally advanced gastric cancer invading adjacent organs, the diagnosis and surgical
Professional Committee on Gastric Cancer of Shanghai Anticancer Association , Professional Committee on Gastrointestinal Cancer of China Association for Promotion of Health Science and Technology
core +1 more source
Estimation of Sex from Patella Measurements in Sichuan Han Population Based on CT-Three-Dimensional Volume Reconstruction Technique [PDF]
, 2020 Objective To estimate sex based on patella measurements of Sichuan Han population by computed tomography three-dimensional volume reconstruction technique, and to explore the application value of patella in sex estimation.
ZHAN Meng-jun , LI Ming, LI Chun-lin , et al.
core +1 more source
Zhongguo shiyan zhenduanxue, 2015 近年来,随着科技的进步和医疗技术水平的提高,多层螺旋CT已在临床得到广泛应用,并发挥着重要作用,其横扫图像具有较高的密度分辨率[1],能准确定位病变部位,显示病变大小、数目、形态及其与周围组织的关系,快速扫描可连续采集图像,患者一次屏气即可完成整个肝脏的扫描,进而避免呼吸移位引起的病变遗漏[2],多层螺旋CT后处理技术方便、快捷、准确,可获得质量最佳的图像 ...
梁康炎
doaj
Value of Pulmonary Cavity Wall Thickness Characteristics and Accompanying CT Signs in the Differential Diagnosis of Thick-wall Cancerous Cavities and Inflammatory Cavities [PDF]
Objective: To explore the value of various computed tomography (CT) features in the differential diagnosis of pulmonary thick-wall cancerous cavitation and inflammatory cavitation.
Hao LI +5 more
core +1 more source
Establishment of Mathematical Models for Skeletal Age Determination of Extremitas Sternalis of Clavicle in Shanxi Adolescents [PDF]
, 2020 Objective To develop mathematical models for skeletal age determination with multiple statistic method based on the correlation between age and the growth of the epiphysis of extremitas sternalis of clavicle in Shanxi adolescents.
ZHANG Hua-hua , ZHAO Chen , LIU Hu-yue , et al.
core +1 more source
Zhongguo shiyan zhenduanxue, 2011 目的探讨肋骨骨折低剂量多层螺旋CT扫描的最佳参数。方法将30名志愿者随机分为3组,分别行低剂量螺旋CT扫描,管电流分别设置为100 mA、50 mA及25 mA,扫描后行薄层及VR、MPR重建,由三位不同年资医师分别进行影像分析,并进行不同管电流组间统计学秩和检验（Kruskal Wallis检验）,选取最佳低剂量扫描参数。再选择10例肋骨骨折患者利用最佳扫描参数进行检查以判断其对于诊断肋骨骨折的可靠性。结果统计学表明,χ2=18.921,P=0.000,三组间差异均有统计学意义。100 mA、50 ...
刘岳峰 +4 more
doaj
Research on Visualization and Virtual Surgery of Liver and its Vessel Based on CT Data Set [PDF]
, 2005 虚拟器官的建模与仿真是当前国际上生物医学工程领域研究的前沿课题。肝脏作为人体最大的实质性脏器，其建模与仿真系统的实现具有十分重大的科学价值和实用意义。肝脏的管道系统是人体内最复杂的管道系统之一，分析其拓扑及形态结构不仅可以应用于解剖教学，更有助于肝脏外科手术规划的制定。本课题中，我们首先探索出一种对DICOM格式的CT数据进行半自动图像分割的方法。并在此基础上重建出肝脏与其内部管道的表面模型。接着运用我们提出的基于平滑的模型简化算法对模型进行平滑与简化。之后，提取出肝脏管道的骨骼线 ...
沈毅
core
70KV超低辐射剂量结合270碘对比剂在主动脉CTA检查中的意义
Zhongguo shiyan zhenduanxue, 2015 随着多层螺旋CT的迅速发展,多层螺旋CT已经成为主动脉疾病诊断和治疗评估的常规手段[1]。对主动脉CT血管成像(CTA)检查而言,往往为了追求图像质量而采用高浓度对比剂,而高浓度对比剂给患者带来的肾脏毒性越来越被人们重视,尤其对于充血性心力衰竭、肾功能受损、糖尿病性肾病的患者,更有必要降低对比剂浓度以减少碘的摄入量,从而降低因使用对比剂可能带来的风险,
杨立强 +5 more
doaj