Results 41 to 50 of about 3,406 (155)
Zhongguo shiyan zhenduanxue, 2011 目的探索适用于64层螺旋CT肾上腺成像筛查肾上腺肿瘤的低剂量扫描参数,以有利于该技术在临床上更广泛应用。方法选择2009年6月至2010年6月吉化集团公司总医院确诊的肾上腺肿瘤30例,男15例,女15例。平均年龄38岁,年龄范围在28岁-67岁之间。肾上腺肿瘤共36个,其中所有病例均经手术病理证实。对照组:健康自愿者10例。一同使用64层螺旋CT在自动管电流模式下以不同的扫描参数组合扫描:噪声指数（NI）分别采用8、121、5、18、21、24、273、0、33;管电压（TV）分别采用140 kV ...
亓波, 王小红
doaj
Zhongshan Daxue xuebao. Yixue kexue ban, 2018 【目的】探讨急性单侧上尿路梗阻肾周桥隔增厚与分肾功能的相关性。【方法】收集因结石所致急性 单侧上尿路梗阻病例50例，所有病例均行多排螺旋CT（MSCT）平扫及增强扫描；根据其是否存在肾周桥隔增厚， 分为有桥隔增厚组和无桥隔增厚组，各25例；测量双肾皮质平扫及增强扫描肾皮质期的CT值，采用独立样本 t 检验分析组间肾皮质 CT 增强值（CT 皮增-CT 皮平）及皮质期患侧与健侧皮质 CT 值比值（CT 患皮 /CT 健皮 ）的差 异。【结果】有桥隔增厚组与无桥隔增厚组比较，肾皮质增强值分别为 ...
张福康 +3 more
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Zhongguo shiyan zhenduanxue, 2021 目的采用双源CT能量成像探讨多发病灶的同源性。方法收经手术病理或者随访观察证实的直肠癌及周围病灶,使用Siemens Somatom Defination Flash功能CT机进行双能CT平扫及增强扫描,经过后处理工作站得到虚拟平扫图像、碘图,能量曲线斜率及标准化碘浓度,计算CT值、对原发灶与其周围病灶进行比较。结果经两独立样本t检验结果显示,不同点动、静脉期结直肠癌和周围淋巴结转移灶各指标比较显示曲线斜率及NIC两组差异均无统计学意义(均P>0.05),说明肿瘤与转移灶的同源性 ...
苏文蕊, 梁其洲, 李香营
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Ultrasonic and CT scanning analysis of coal-rock mass under the primary bedding structure [PDF]
In order to study the influence of the primary bedding structure on wave velocity and mechanical properties of coal-rock mass, multilayer and multi-directional ultrasonic and CT scanning tests were carried out in laboratory.
Chunyuan LI +6 more
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Zhongguo shiyan zhenduanxue, 2019 近年来,人们生活习惯与方式的转变,胃肠道间质肿瘤的发生率上升[1]。与此同时,临床开始加强对该肿瘤诊断与治疗的重视。就胃肠道间质肿瘤而言,诊断方法较多,不同诊断方法所取得的效果不尽相同。临床指出,多排螺旋CT增强扫描在肿瘤诊断中的效果较好[2,3]。多排螺旋CT增强扫描,是新颖的诊断方法,敏感性较高。为了明确多排螺旋CT增强扫描对胃肠道间质瘤的价值,本研究展开探析 ...
胡东 +5 more
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A Randomized Phase I/II Trial to Compare Weekly Usage with Triple Weekly Usage of Paclitaxel in Concurrent Radiochemotherapy for Patients with Locally Advanced Non-small Cell Lung Cancer [PDF]
, 2011 Background and objective Although the guidelines of the National Comprehensive Cancer Network of USA recommend that the standard therapy for locally advanced non-small cell lung cancer (LANSCLC) is concurrent chemoradiotherapy.
Anhui SHI +4 more
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Value of Low Tube Voltage Combined with Deep Learning Image Reconstruction Algorithm to Reduce Radiation Dose in Combined Thoracoabdominal Enhanced CT [PDF]
Objective: To investigate the effect of low tube voltage combined with deep learning image reconstruction (DLIR) on radiation dose reduction and maintaining image quality in combined chest and abdominal enhanced CT scans. Methods: (1) Phantom study.
Bei AN +6 more
core +1 more source
Zhongguo shiyan zhenduanxue, 2014 急性门静脉、肠系膜上静脉血栓形成是临床上少见的血管阻塞性疾病,Kumar[1]等建议肠系膜上静脉血栓形成分为小血管型及大血管型,小血管型仅有单纯肠系膜上静脉小血管血栓形成,而大血管型则累及大血管或合并门静脉或脾静脉血栓形成。此病容易误诊,死亡率较高[1-5],常规CT扫描速度慢,层厚较厚,对该病的敏感性相对较低,多层螺旋CT扫描速度快、通过平扫及增强扫描,利用其强大的后处理功能进行血管 ...
孙培祥
doaj
Structure of the Ambrosia Beetle (Coleoptera: Curculionidae) Mycangia Revealed Through Micro-Computed Tomography [PDF]
, 2018 Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae and Platypodinae) rely on a symbiosis with fungi for their nutrition. Symbiotic fungi are preserved and transported in specialized storage structures called mycangia.
Gillett, Conrad P.D.T +7 more
core +1 more source
[The modified Valsalva maneuver in hypopharynx CT scan]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2023 Liang X +7 more
europepmc +1 more source