CONTRAST STUDY ON CT AND BA IN 3000 PATIENTS

Brain atlas(BA)is an important diagnostictechnique after CT and MRI·By clinical experi-ence,there were some advantages in BA·BA cansupplement shortage of CT·But there was also someshortages in BA·The contrast study between CTandBA in3000patients was reported as follows now:Data and MethodGeneral data:In3000patients,male was1490cases(49·7%),female was1510cases(50·3%)·Largest age was82years old·Smallest age was3days·Clinical disease examined:Acute cerebrovascu-lar diseases we…     

CONTRAST STUDY ON CT AND BA IN ACUTE CEREBROVASCULAR DISEASES

Objective: To explore contrast application on CT and BA in acute cerebrovascular diseases.Method: CT and BA were examined in 718 patients with acute cerebrovascular disease. Results: The different changes of CT and BA were showed in 718 patients with acute cerebrovascular disease.Conclusion: There were separately different advantage and shortcoming in CT and BA in diagnosis of acute cerebrovascular diseases. The value of clinical application of BA was important in acute cerebrovascular diseases.     

CONTRAST STUDY ON BA AND CT IN PATIENTS WITH BRAIN TRAUMA

目的:探讨脑电地形图与脑CT在脑外伤诊断中的应用价值。方法:脑电地形图和脑CT在124例脑外伤患者中被检查了,并且进行了对比。结果:在硬膜内和外血肿等器质病变中,BA和CT的定性和定位诊断是一致的,在脑震荡和脑外伤后综合征等功能性病变中,BA是阳性而CT是阴性。结论:脑电地形图在脑外伤的诊断中有重要应用价值。     

THE CONTRAST STUDY ON LEVEL DIAGNOSIS OF CT AND BA IN CEREBROVASCULAR DISEASES

Objective:To explore level diagnosis on CT and BA in cerebrovascular diseases. Meth-od:CT and BA were examined in 53 patients with eerebrovascular diseases and compared in level diagnosis. Result: The sides on level diagonsis of CT and BA were identical. The rang of diseases was larger in BA than that in CT. Conclusion: BA can help level diagnosis in cerebrovaseular diseases. The level diagnosis of BA and CT were basically identical.     

CONTRAST STUDY ON CT AND BA IN DIAGNOSIS OF PATIENTS WITH ATHEROTHROMBOTIC BRAIN INFARCTION

~~CONTRAST STUDY ON CT AND BA IN DIAGNOSIS OF PATIENTS WITH ATHEROTHROMBOTIC BRAIN INFARCTION$河北省人民医院     

CONTRAST STUDY ON BA AND CT IN PATIENTS WITH POST-TRAUMATIC BRAIN SYNDROME

目的：探讨脑电地形图与脑 CT 在脑外伤后综合征患者诊断中的应用价值。方法：103 例脑外伤后综合征患者进行了脑电地形图和脑 CT 检查,并进行对比。结果：在脑外伤后综合征患者中,脑电地形图显示阳性改变,而脑 CT 为阴性。结论：脑电地形图在脑外伤后综合征患者的诊断中有重要应用价值。     

THE STUDY APPLIED ON BA IN DIAGNOSIS OF CEREBRAL ARTERIOSCLEROSIS

目的:探讨脑电地形图在脑动脉硬化诊断中的应用价值。方法:90例脑动脉硬化患者进行了脑电地形图及脑CT检查,并两者进行了对比。结果:90例脑动脉硬化患者的脑电地形图改变是明显的,与脑CT对比有显著差异,P0.01。结论:脑电地形图在脑动脉硬化患者诊断中有重要价值。     

Contrast study on CT and BA in cerebral hemorrhage due to hypertension

Cerebral hemorrhage due to hypertension iscommon and multiple disease in middle-old per-son.Its mortality rate and disbility rate were higher.The people′s health was threatened seriously.Inorder to explore method of overearly diagnosis andtreatment and d…     

THE CONTRAST STUDY ON BA AND CT IN PATIENTS WITHCEREBRAL INFECTIOUS DISEASES

目的:探讨脑电地形图与脑CT在脑感染性疾病诊断中的应用价值。方法:脑电地形图和脑CT在99例患有脑感染性疾病患者中被检查了并且进行了对比。结果:在疾病的定性和定位诊断中,脑电地形图和脑CT是一致的。但是,在阳性率方面,散发性病毒性脑炎在脑电地形图中94例是阳性,而在CT中只56例是阳性。结论:脑电地形图在脑感染性疾病的诊断中有重要应用价值。     

急性脑血管病之脑电地形图与脑CT对比研究

本文报告了急性脑血管病的脑电地形图与脑CT的对比研究。介绍了急性脑血管病的脑电地形图改变,对脑电地形图与脑CT在急性脑血管病诊断上的优劣进行了对比,进一步讨论了脑电地形图在急性脑血管病中的临床应用价值。     

APPLIED STUDY ON BA IN CARBON MONOXIDE POISONING

目的:探讨脑电地形图在一氧化碳中的应用价值。方法:63例一氧化碳中毒患者的脑电地形图被检查了。结果:这63例病人的脑电地形图改变是明显的。结论:脑电地形图在一氧化碳中毒患者的诊断、治疗和预后中有重要应用价值。     

THE APPLIED STUDY ON BA IN DIAGNOSIS OF INTERPHASE OF ATTACK OF EPILEPSY

目的：探讨脑电地形图在癫痛发作间期诊断中应用价值。方法：脑电地形图在110例癫痫患者的发作间期被检查了。并且与脑电图进行了对比。结果：脑电地形图在110例癫痫患者发作间期有明显改变，与脑电图有显著差异（P〈0．01）。结论：脑电地形图在癫痫发作间期诊断中的应用价值是重要的。     

Lanthanide-based nanocrystals as dual-modal probes for SPECT and X-ray CT imaging

Applications of lanthanide-based nanoparticles for bioimaging have attracted increasing attention. Herein, small size PEG-EuOF:¹⁵³Sm nanocrystals (∼5 nm) (PEG = poly(ethylene glycol)bis(carboxymethyl)ether) combined with the radioactive and X-ray absorption properties were synthesized. The distribution of the PEG-EuOF nanocrystals in living animals was studied by ex vivo radioassay, inductively coupled plasma-atomic emission spectrum (ICP-AES) analysis and in vivo SPECT imaging, which indicated that the small size PEG-EuOF:¹⁵³Sm had long blood retention time (blood half-life (t_1/2) reach to 4.65 h) and were eliminated significantly through biliary/gastrointestinal pathway in vivo. Meanwhile, benefiting from the high attenuation ability of Eu, the small size PEG-EuOF was successfully applied for lymph node CT imaging, extending the bio-applications of these small nanocrystals. The results of cytotoxicity and in vivo toxicity also showed that the PEG-EuOF nanocrystals have relatively low toxicity, which suggest their safety for in vivo imaging. The studies provide preliminary validation for the use of PEG-EuOF nanocrystals for in vivo bioimaging applications.     

计算机模拟CT滤波反投影重建的方法

目的:选择合适的滤波函数处理对CT反投影图像进行滤波,从而达到消除反投影所产生的星形伪影的目的。使得CT滤波反投影重建的方法直观地演示出来,也便于比较不同滤波函数的效果,寻找更好的滤波函数。方法:采用计算机软件编程实现计算机模拟CT反投影重建,以VC软件平台IDE集成开发环境,开发出一个具有可视图形界面的上位机软件,通过选择不同的滤波反投影参数,对重建的图像的效果进行定量的比较,探讨滤波函数中不同参数对结果的影响。结果:通过软件编程实现了标准体模图像重建的模拟,界面简单,可以直观地对CT图像进行反投影重建,同时所选择的基于频率域变换的滤波函数也部分消除了重建过程中造成的星形伪影,提高了图像均匀度,使标准体模的重建图像达到预期的理想效果。结论:开发的软件实现了CT反投影重建,能够将标准体模反投影重建的成像过程以更清晰的方式展现出来,有利于在医学物理学理论课和实验课的教学中,直观演示星形伪影及滤波效果,使学生更好地学习CT技术的原理。也有利于尝试新的投影算法,寻找新的滤波函数。     

PRELIMINARY EXPLORATION OF NORMAL VALUE OF BA ON CHILDREN IN HEBEI REGION

目的:探讨河北省地区儿童的脑电地形图的正常值。方法:对30例正常儿童通过BA-Ⅲ型脑电地形图仪进行了检查。结果:30例正常儿童地形图各频段的平均正常值被初步确定。结论:30例正常儿童的脑电地形图的正常值是有参考价值的。     

Dose management in CT facility

Computed Tomography (CT) examinations have rapidly increased in number over the last few years due to recent advances such as the spiral, multidetector-row, CT fluoroscopy and Positron Emission Tomography (PET)-CT technology. This has resulted in a large increase in collective radiation dose as reported by many international organisations. It is also stated that frequently, image quality in CT exceeds the level required for confident diagnosis. This inevitably results in patient radiation doses that are higher than actually required, as also stressed by the US Food and Drug Administration (FDA) regarding the CT exposure of paediatric and small adult patients. However, the wide range in exposure parameters reported, as well as the different CT applications reveal the difficulty in standardising CT procedures. The purpose of this paper is to review the basic CT principles, outline the recent technological advances and their impact in patient radiation dose and finally suggest methods of radiation dose optimisation.     

THE CONTRAST ANALYSIS BETWEEN BA AND REG IN DIAGNOSIS OF PATIENTS WITH VASCULAR HEADACHE

目的:探讨脑电地形图与脑血流图在血管性头痛患者诊断中的应用价值.方法:脑电地形图与脑血流图被检查并对患者阳性率进行了对比.结果:脑电地形图的阳性率是100%,脑血流图的阳性率是43.1%.两者对比P值<0.05.结论:脑电地形图在血管性头痛的诊断中有重要价值.

Abstract：

Objective:To explore value applied of BA and REG in diagnosis of patients with vascular headache.Method:BA and REG were examened in patients with vascular headache and cornpared in positive rate between BA and REG.Result:The positive rate of REG was 43.1% and BA was 100%(P<0.05).Conclusion:The diagnostic value of BA was important in vascular headache.     

肺部CT图像气管树分割技术研究进展

肺部气管是人体与外界进行气体交换的唯一通路;其解剖结构信息可用于诊断呼吸系统疾病。计算机断层扫描技术(CT)是检测呼吸系统疾病的主要手段,但因就诊人数多、图像数据量大等因素;导致人工阅片费时费力。而肺部气管树的自动提取与分割;是实现自动化定量分析与呼吸系统疾病辅助诊断的前提。首先对肺部气管树分割技术的背景及意义进行介绍;然后分析对比传统分割技术、基于管状结构检测的分割技术以及基于机器学习的分割技术所运用的研究方法和存在的问题。最后指出提高肺部气管树分割效果;依赖于将气管分割技术与泄漏剔除技术相互结合;需要在尽可能分割出多数气管树分枝的基础上;消除分割结果中存在的伪气管区域。     

鼻咽光纤镜与CT检查在鼻咽癌诊断中的对比研究

对387例因各种鼻咽病变同时作了鼻咽光纤镜与CT检查的患者进行对比研究,发现:1咽旁间隙与颈动脉鞘区的改变并非鼻咽癌所特有,鼻咽癌依据CT分期有可能使T期增加,因而病期增加;2鼻咽腔肌肉运动、痂皮等可能影响CT成像;3鼻咽癌放疗后原病灶部位CT表现多有肿胀或增厚,伴或不伴有咽旁间隙和/或颈动脉鞘区的改变,判断病灶是否残留或复发,一定要有病理诊断;4鼻咽光纤镜与CT检查在鼻咽癌诊断中存在较大差异。     

Hyoid Bone Development: An Assessment Of Optimal CT Scanner Parameters and Three‐Dimensional Volume Rendering Techniques

The hyoid bone anchors and supports the vocal tract. Its complex shape is best studied in three dimensions, but it is difficult to capture on computed tomography (CT) images and three‐dimensional volume renderings. The goal of this study was to determine the optimal CT scanning and rendering parameters to accurately measure the growth and developmental anatomy of the hyoid and to determine whether it is feasible and necessary to use these parameters in the measurement of hyoids from in vivo CT scans. Direct linear and volumetric measurements of skeletonized hyoid bone specimens were compared with corresponding CT images to determine the most accurate scanning parameters and three‐dimensional rendering techniques. A pilot study was undertaken using in vivo scans from a retrospective CT database to determine feasibility of quantifying hyoid growth. Scanning parameters and rendering technique affected accuracy of measurements. Most linear CT measurements were within 10% of direct measurements; however, volume was overestimated when CT scans were acquired with a slice thickness greater than 1.25 mm. Slice‐by‐slice thresholding of hyoid images decreased volume overestimation. The pilot study revealed that the linear measurements tested correlate with age. A fine‐tuned rendering approach applied to small slice thickness CT scans produces the most accurate measurements of hyoid bones. However, linear measurements can be accurately assessed from in vivo CT scans at a larger slice thickness. Such findings imply that investigation into the growth and development of the hyoid bone, and the vocal tract as a whole, can now be performed using these techniques. Anat Rec, 298:1408–1415, 2015. © 2015 Wiley Periodicals, Inc.