课件：双源C及其临床应.ppt

主要经营：网络软件设计、图文设计制作、发布广告等 公司秉着以优质的服务对待每一位客户，做到让客户满意！ 致力于数据挖掘，合同简历、论文写作、PPT设计、计划书、策划案、学习课件、各类模板等方方面面，打造全网一站式需求 * * * * Patient with myocardial bridging of the LAD, shown nicely in the end systolic phase. * Optimal cardiac imaging can be best achieved in the diastolic phase of the heartbeat. The faster the heart rate, the shorter this phase becomes. At a low and stable heart rate, the time a single source CT scanner needs for imaging is sufficient. This is comparable with a camera that has a long shutter speed, imaging a car passing by very slowly. The result: sharp images. CLICK The faster the heart rate, the shorter the diastolic phase becomes. At higher or varying heart rates, the diastolic phase is too short for a single source CT scanner. This is now comparable to the camera with the same long shutter speed, imaging a racing car passing by very fast. The result: poor image quality, blurry images. * * Unprecedented image quality and detail with the industry’s highest routine isotropic resolution of below 0.4 mm in combination with fast acquisition speed are clearly demonstrated. * With a large, 78 cm bore + field of view and 200 cm scan range you can scan most acute patients. Even patients carrying life support equipment can be easily positioned and examined, saving precious time from scan to diagnosis. SOMATOM Definition is the first CT scanner offering a comprehensive solution for acute care – without compromise. * * * * 适应证___肺小结节的随访评估功能 适应证___CNS急性脑缺血的CT灌注成像 适应证___CNS急性脑缺血的CT灌注成像 适应证___CNS急性脑缺血的CT灌注成像 适应证___CNS急性脑缺血的CT灌注成像 适应证___CNS脑肿瘤的CT灌注成像 适应证___CNS脑肿瘤的CT灌注成像 适应证___CNS脑肿瘤的CT灌注成像 适应证___腹部肝脏CT灌注成像 适应证___腹部肝脏CT灌注成像 适应证___腹部肝脏CT灌注成像 适应证___腹部结肠仿真内窥镜 适应证___腹部结肠三维重建 结肠癌。男性,62岁。 检查前一天出现不明原因腹泻，伴有血便。 结肠镜检查时只能进入43厘米。 CT横结肠处巨大肿瘤，表面成分叶状，距离肛门约73厘米。 适应证|骨 科骨折 适应证 |骨 科骨折 适应证___ 骨 科骨折的VR重建 适应证___ 骨 科骨骼的VR重建 DSCT新的适应范围 双源CT采用双能量扫描时两个球管的管电压分别为80KV和140KV，低KV球管的管电流为高KV球管管电流的三倍以保证其输出的射线有足够的能量，两个球管能同时同层进行扫描，所获得的低能和高能数据不存在位置和时间差，极大拓展了双能CT的应用，目前双源CT双能的应用包括一下几个