Results 21 to 30 of about 2,052 (140)

Application of Intravascular Imaging in Forensic Autopsy#br# [PDF]

open access: yes, 2019
With the emergence of new technologies and devices including minimally invasive catheters and rotary couplers, the application of imaging technology such as traditional ultrasound and optical coherence tomography (OCT) is gradually expanded.
LI Yang, WEI Zhi-bin, DING Yu-han,et al.
core   +1 more source

ECG电流调控模式在256层螺旋CT冠脉成像中的应用

open access: yesZhongguo shiyan zhenduanxue, 2011
目的比较256层螺旋CT冠脉成像中ECG电流调控模式及回顾性心电门控扫描的图像质量和病人的辐射剂量。方法对62例怀疑冠心病患者进行256层螺旋CT冠状动脉造影,患者随机分成两组,A组采用回顾性心电门控扫描成像,B组采用ECG电流调控模式成像,对两组患者的图像质量进行主观及客观评价,客观评价包括信号噪声比及对比度噪声比,同时对患者的辐射剂量进行比较。结果 A组及B组的图像信号噪声比分为(14.41±1.05)和(15.07±3.29),差异无统计学意义(t=-1.07,P=0.29 ...
郭铁刚   +5 more
doaj  

Value of CT and MRI imaging features in differential diagnosis of giant cell tumors with prominent aneurysmal bone cysts in the extremities and primary aneurysmal bone cysts [PDF]

open access: yes
Objective To explore the value of computerized tomography (CT) and magnetic resonance imaging (MRI) imaging features in differential diagnosis of giant cell tumors with prominent aneurysmal bone cysts (GABCs) in the extremities and primary aneurysmal ...
LIU Jianhui, WANG Dezhi, CUI Jiufa, XU Wenjian
core   +1 more source

CT检出结肠结节状病灶的影响因素 [PDF]

open access: yes, 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  

近景摄影测量技术在坡耕地土壤侵蚀速率研究中的应用

open access: yesShuitu Baochi Xuebao, 2018
以5°,10°,20°的紫色土坡耕地为研究对象,分别进行5,10,15次强度的模拟耕作试验,在此基础上采用60 L/min的流量进行3轮放水冲刷试验,采用近景摄影测量技术监测试验前后紫色土坡耕地小区的地形变化,通过生成高精度DEM数据计算土壤流失体积,并采用插钎法测量土层深度变化,验证近景摄影测量技术测定地形变化的准确度,进而推算不同坡度条件下的紫色土坡耕地耕作侵蚀速率和水力侵蚀速率。结果表明:(1)采用近景摄影测量技术能够准确监测地形变化,其测算结果与插钎法的结果比较接近 ...
杨, 苏正安
doaj  

The application of 18F-FDG PET/CT with tumor markers NSE and ProGRP in the diagnosis and treatment of small cell lung cancer [PDF]

open access: yes
Small cell lung cancer (SCLC) is the most common neuroendocrine tumor in the lungs. SCLC is characterized by high malignancy and high recurrence and metastasis rates.
LIN Shuai, WANG Yanli
core   +1 more source

Evidence for Involvement of Unaffected Parietal Cortex in Brain Reorganization from Acute Stroke : A fMRI Study [PDF]

open access: yes, 2005
目的:利用功能性磁共振成像(fMRI)技术探讨缺血性卒中急性期的脑功能重组特点。资料与方法:采用被动单指运动任务,对4例急性皮质下梗死患者和4名正常人进行fMRI研究,比较正常人与卒中患者之间以及每个卒中患者之间fMRI结果的异同。结果:正常人被动单指运动激活对侧感觉运动皮层(SMC)、后顶叶皮层(PPC)和双侧辅助运动区(SMA)。卒中患者健手运动fMRI结果基本同正常人; 患手运动时,除1例同(健)侧SMC、SMA、前运动皮层(PMC)激活外,4例均呈现出同侧PPC的激活。结论 ...
夏圣梅   +5 more
core  

多层螺旋CT分析周围型肺癌形态学特征—MPR正交重组切面结合MIP

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2016
【目的】分析多层螺旋CT后处理图像(MPR正交重组切面结合MIP)对周围型肺癌形态学特征的显示价值。【方法】回顾性纳入75例(男:女= 36:39;平均年龄:60.0岁)术前行64排CT检查并经手术病理证实为周围型肺癌的孤立性肺结节。记录结节形态学特征(边缘,分叶征、血管集束征、胸膜凹陷征、毛刺征)分别在横断位,冠、矢状切面及MPR正交重组切面结合MIP(5 mm)图像上的显示率、诊断结果,进行对比分析。【结果】MPR平行肺门支气管血管束方向5 mm MIP 明显提高肺结节血管集束征的检出率 ...
高樱
doaj  

低剂量64层螺旋CT成像在结肠癌鉴别诊断中的价值及影像学特点分析

open access: yesZhongguo shiyan zhenduanxue, 2017
目的比较分析低剂量64层螺旋CT成像(64-MSCT)在结肠癌鉴别诊断中的价值并分析其影像学特点。方法选取46例确诊或高度可以结肠癌病人进行结肠充气64-MSCT检查,通过得出的图像来诊断结肠癌,计算检查准确率,同时46例患者应用气钡双对比造影以及手术病理结果进行对比。将扫描获得的结果通过图像重建的方法进行图像处理,得到的MPR-CTVE融合图像与肠镜结果进行对比。结果 46例中,全部诊断经病理和手术确认为结肠癌,低剂量64-MSCT结果全部诊断为结肠癌,诊断敏感度为100%(46/46 ...
计一丁, 徐东风
doaj  

Efficacy of intravitreal injection of the dexamethasone intravitreal implant Ozurdex® in treatment of patients with refractory diabetic macular edema of different optical coherence tomography patterns [PDF]

open access: yes
Objective To investigate the efficacy of intravitreal injection of Ozurdex® in the treatment of refractory diabetic macular edema (DME) with different optical coherence tomography (OCT) patterns.
WANG Yibo, MENG Xuxia, LIU Penghui, YANG Jing
core   +1 more source

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