CT 平扫(noncontrast CT,NCCT)由于应用广泛、检查时间短、检查费用较低,以及可准确检查蛛网膜下腔出血和脑实质出血等优点,已经成为急性脑卒中的一线影像学检查方法。大量研究证明,NCCT检出急性缺血性脑卒中病灶的能力与MR的T2WI检出能力相当,可以检出6小时内(超急性期)的脑缺血灶。 更重要的是,CT检查不仅能发现超急...
胃癌手术关注的血管变异主要在2~3级(如迷走肝左动脉),这些血管动脉晚期亦可清晰显示,CT动脉成像(CT⁃Angiograph,CTA)动脉早期检查临床价值有限。静脉期(60~90 s)除了利于观察周围组织脏器侵犯,也有助于淋巴结转移、腹膜转移及壁外血管侵犯(extramural vascular invasion,EMVI)的检出及诊断[22]。根据需要(如评估肿...
What is the difference between a CT angiogram and a CT scan with IV contrast? An angiogram is a specific type ofCT scanwith contrast. In a CT angiogram the contrast is timed so that it will highlight either the arteries or veins (venogram) of interest. What is a CT angiography used f...
CT 平扫(noncontrast CT,NCCT)由于应用广泛、检查时间短、检查费用较低,以及可准确检查蛛网膜下腔出血和脑实质出血等优点,已经成为急性脑卒中的一线影像学检查方法。大量研究证明,NCCT检出急性缺血性脑卒中病灶的能力与MR的T2WI检出能力相当,可以检出6小时内(超急性期)的脑...
Dorr and associates (2013) stated that clinical studies have consistently shown that there is only a very weak correlation between the angiographically determined severity of CAD and disturbance of regional coronary perfusion. On the other hand, the results of randomized trials with a fractional flow...
探索单能级重建(Mono-E)技术对强化欠佳肺动脉CT造影图像的补救能力,探索碘密度值和有效原子序数值(Z-effective)对最优补救单能级的预测能力,并寻找合适的窗口设置。 资料与方法 回顾性分析2019年8月—2022年2月天津医科大学宝坻临床学院...
Contrast- enhanced angiographic cone-beam CT of cerebrovascular stents: Experimental optimization and clinical applica- tion. Am J Neuroradiol 2011; 32: 137-144.Patel NV, Gounis MJ, Wakhloo AK, et al. Contrast-enhanced angio- graphic cone-beam CT of cerebrovascular stents: experimental op- tim...
Define Multidetector CT. Multidetector CT synonyms, Multidetector CT pronunciation, Multidetector CT translation, English dictionary definition of Multidetector CT. n. Abbr. CT Tomography in which computer analysis of a series of x-ray scans made of a bo
Acquisition performed with only 40 mL of contrast media agent Courtesy of Baotou Central Hospital, Baotou, PR China Collimation:2 x 192 x 0.6 mm Pitch:2.0 Scan time:0.28 s Scan length:128 mm Rotation time:0.25 s Tube setting:70/70 kV, 80 mAs ...
or enlarge. Cavernous malformations are the most common angiographically occult CNS vascular malformation, with a prevalence of approximately 0.5%. About 75% of cases are solitary (sporadic), with 10% to 30% of cases being multiple or familia...